ICSE

ICSE Class 10 Computer Applications Sample Question Paper 12 with Answers

Section -A (40 Marks)
Attempt all questions

Question 1
(a) What do you mean by reusability feature.
(b) Write the java expression for the roots of the quadratic equation.
(c) Name any two jump statments and their usages.
(d) (i) Name the mathematical function which is used to find the cosine of an angle given in radians.
(ii) Name a string functions which removes the blank spaces provided in the prefix and suffix of a string.
(e) What do you mean by dynamic initialization of an array? Give an example.
Answer:
(a) Reusability feature is related to inheritance in java where derived class can use the methods and common data from the base class.

(b) double r1 = (-b + Math.sqrt(b * b – 4 * a * c)) / (2 * a);
double r2 = (-b – Math.sqrt(b * b – 4 * a * c)) / (2 * a);

(c) (i) break;
(ii) continue
for(int i =1; i< 10; i++)
{
if(i*3 == 9)
break;
}
for(int i =1; i< 10; i++)
{
if(i%2 == 0)
continue;
System.out.println(i);
}

(d) Math.cos(b) trim( ).
Answer:
Math.cos(b)
trim( ).

(e) When the array is initialized during the run time of program its called dynamic initialization of array.
E.g.
int a[ ] = new int[10];

Question 2
(a) Consider the following code
class lol
{
public static int m=3,y=4; public int a =10,b = 15;
}
(i) Name the variables for which each of object of the class will have its own distinct copy.
(ii) Name the variables that are common to all the objects of the class.
Answer:
(i) m and y
(ii) a and b.

(b) Distinguish between constructor and method.
Answer:

(c) What are the values of a and b after the following function is executed if values passed are 30 and 50.
void pass(inta, int b)
{
a = a+b; b= a-b; a = a-b;
System.out.println(“a=”+a+””b=”+b);
}
Answer:
a=50 b=30

(d) Rewrite the following statement using if-else statement amount = (x!=50)?((x<50)?(4.0/100*x):(l 0.0/100*x)):500;
Answer:

if(x!=50)
{
if(x<50)
amount = 4.0/100*x; 
else
amount = 10/100*x;
}
else
amount = 500;

(e) Name any two tokens of java.
Answer:
variables and constants.

Question 3
(a) What are the different keywords that checks the visibility of a member of the class? What are they called?
(b) Determine how many times loop will be executed and print the output.
int a=1, b=2; while(++b<6)a*b;
System.out.println(a);
(c) Attempt the following:
(i) A package that is involved to manipulate character as well as String?
(ii) Name a data type that can hold 16 bit Unicode characters.
(iii) What is the output of code below:
charc = ‘A’; int m = 5;
System.out.println(char(c+m));
System.out.println(c+m);
(iv) Write statements to show how finding the length of a character array char[ ] differs from finding the lengths of string object str.
(v) Give the output of the following functions System.out. println(“MALAYALAN”.indexOf(‘A,)+”Sidharth”.lastlndexOf(‘h’));
(vi) double a = Math.pow(“200”.index0f(‘0’),2);
System.out.println(a);
(vii) Differentiate between linear search and binary search.
(viii) Evaluate the following expression:
int p, k= 8,m=11,r=7; p = (r++%7)+(-m%5)+k*(++k-8);
Answer:
(a) private, public, protected
(b) 3 times 60
(c) (i) java.lang
(ii) byte
(iii) F 70
(iv) array.length and str.length( )
(v) 8
(vi) 1.0
(vii)

(viii) 8

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
Write a program in java to input a number and check whether it is a pronic number or Heteromecic number or not.
Pronic number: A pronic number, oblong number, rectangular number or heteromecic number is a number which is the product of two consecutive integers i.e n(n-t-l)
The first few Pronic numbers are:
0,2,6,12.20,30,42,56,72.
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
System.out.print("lnput a number:"); 
int n = sc.nextlnt( ); 
int result = 0; for(int i=0; i<n; i++)
{
if(i*(i+1) == n)
{
result = 1; break;
}
}
if(result == 1)
System.out.println(''Pronic Number."+n); 
else
System.out.println("Not a Pronic Number."+n);
}//end of main 
}//end of class

Question 5
Write a program to input a word from the user and remove the duplicate characters present in it.
Example:
input: crcricicket
output: criket
Answer:

import java.util.*; 
class Main
{
public static void main(String[ ] args)
{
Scanner sc=new Scanner(System.in); 
System.out.printlnC'Enter a sentence:"); 
String str=sc.nextLine();
String word =
char c = str.charAt(O);
word+=c;
for(int i=0;i<str.iength();i++)
{
char ch=str.charAt(i);
boolean flag=false;
for(int j = 0; j<word.length();j++)
{
if(ch==word.charAt(j))
{
flag = true;
}
}
if(flag == false) 
word+=ch;
}
System.out.println(word);
}//end of main 
}//end of class

Question 6
Write a program to accept a sentence and print only the first letter of each word of the sentence in capital letters separated by a full stop.
e.g.
INPUT Sentence: Sid is a cricket output: S.I.A.C
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc=new Scanner(System.in);
System.out.println(''Enter a sentence: ");
String str=sc.nextLine( );
str = "" +str;
str = str.toUpperCase( );
String word =
for(int i = 0; i < str.length( ); i++)
{
char ch = str.charAt(i); 
if(ch =='')
{
word+=str.charAt(i+1
}
}
System.out.println(word);
} //end of main 
}//end of class

Question 7
Write a program to accept name and corresponding age in two different single dimensional array. Display the records in descending order of age using bubble sort.
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
int temp;
String temp 1;
String a[ ] = new String[15];
int age[ ] = new int[15];
Scanner sc = new Scanner(System.in); 
System.out.printlnC'Enter a 15 names and their ages:"); 
for(int i =0; i<a.length; i++)
{
System.out.print("Enter name"+ (i+1) 
a[i] =sc.next( );
System.out.print("Enter age"+ (i+1) +":"); 
age[i]=sc.nextlnt( );
}
for(int i = 0;i<age.length; i++)
{
for(int j =0; j<age.length - i - 1 ;j++)
{
if(age[j]<(age[j+1]))
{
temp = age[j]; tempi = a[j]; 
age[j]=age[j+1]; 
a[j] = a[j+1 ]; 
age[j+1] = temp; 
a[j+1]=temp1;
}
}
}
for(int i =0; i <a.length;i++)
{
System.out.println(a[i]+"\t"+age[i]);
}
}//end of main 
}//end of class

Question 8
Write a menu driven program to find area of an Equilateral triangle, an isosceles triangle and a scalene triangle as per the users choice.
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in); int n;
float a,c,s,b; double area;
System.out.priintln("1 .Area of equilateral triangle"); System.out.priintln("2.Area of isosceles triangle");
System.out.priintln("3.Area of scalene triangle");
n=sc.nextlnt( );
switch(n)
{

case 1:
System.out.printlnC'Enter side of an equilateral triangle");
s=sc.nextFloat( );
area=Math.sqrt(3.0*s*s)/4.0;
System.out.println("Area="+area);
break;

case 2:
System.out.printlnC'Enter the side and base of isosceles triangle”);
a=sc.nextFloat( );
b=sc.nextFloat( );
area=b/4.0*(Math.sqrt(4.0*a*a-b*b));
System.out.println("Area="+area);
break;

case 3:
System.out.printlnC'Enter the 3 sides of scalene triangle");
a=sc.nextFloat( );
b=sc.nextFloat( );
c= sc.nextFloat( );
s= (a+b+c)/2;
area=Math.sqrt(s*(s-a)*(s-b)*(s-c));
System.out.println(”Area="+area);
break-
default:
System.out.println("Wrong choice");
}
}//end of main 
}//end of class

Question 9
Define a class to overload a function Sum() as follows:
(i) int Sum(int a, int b) – with integer arguments a and b.
Calculate and return sum of all even numbers in the range of a and b.
Sample input: a = 4, b = 16
Sample output: sum = 4 + 6 + 8 + 10 + 12 + 16

(ii) double Sum(double n) – with one double argument n. Calculate and return the product of the following series:
sum = 1.0*1.2*1.4*…’*n

(iii) int Sum(int n) – with one integer argument n. Calculate and return sum of only odd digits of the number n.
Sample input: n = 43961
Sample output: sum = 3 + 9+1=13
Answer:

import java.util.*;
class Main
{
public int sum(int a, int b)
{
int sum= 0; for(int i=a; i<=b;i++)
{
if(i%2==0)
sum+=i;
}
return sum;
Wend of sum
public double sum(double n)
{
double prod=1.0;
for(double i =1.0;i<=n; i+=0.2)
prod*=i; 
return prod;
}
public int sum(int n)
{
int sum = 0; 
int a = n; 
int digit; 
while(a>0)
{
digit = a%10; 
if(digit%2!=0) 
sum+=digit; 
a=a/10;
}
return sum;
}
public static void main(String args[ ])
{
Main s = new Main( );
System.out.println(s.sum(1,5));
System.out.println(s.sum(10.0));
System.out.println(s.sum(10935));
}//end of main
} //end of class

ICSE Class 10 Computer Applications Question Papers with Answers

ICSE Class 10 Computer Applications Sample Question Paper 11 with Answers

Section- A (40 Marks)
Attempt all questions

Question 1
(a) Give one similarity and one difference between do while and while loop.
(b) Write the java statement to find largest of 3 numbers using conditional operator.
(c) What is polymorphism?
(d) Write a function to round off any fractional number? Give one example.
(e) What is difference between infinite loop and fall through statement?
Answer:
(a) Similarity – Both while and do while loop is used when the no. of iterations are not specified. Difference: while loop is entry controlled loop and while do while loop is exit controlled.

(b) int a = (b>c)?b:c; int d = (a>e)?a:e;

(c) Polymorphism is the identity to represent an object in more than one form.

(d) Math.round( )
double k = Math.round(2.9);

(e)

Question 2
(a) Compare local, instance and class variables on the basis of the given criteria.
(i) identification in program
(ii) Usage of access specifier with them.
(iii) provision of initial values.
(iv) Number of copies for each object of class.
Answer:
(a) (i) Local variables are usually used in a block of statement. Instance variables are used by a method while class variable has only one copy throughout out the class.

(ii) Local variable scope remains inside the compound statement. Inside the curly braces.
Instance variable scope remains inside the method. All access specifiers can be used in class variables. Scope is throughout the class.

(iii) Local variables is initialized in its scope.
Instance variables initialized in the method where it is used in.
Class variables are initialized after the class declaration.

(iv) local variables multiple copies can exists.
Instance variables multiple copies can exists.
Class variables single copy exists.

(b) Which OOPs principle is implemented when you:
(i) use the keyword extends
(ii) create an interface
(iii) create various functions
(iv) use private data members?
Answer:
(i) Inheritance
(ii) Abstraction
(iii) Polymorphism
(iv) Encapsulation

(c) What are functions? Give one advantage using functions.
Answer:
Functions are a set of statements used to perform certain tasks. Advantage: It organizes the code into a blocks and helps in performing specific task.

(d) Differentiate between classes and objects. Why is object referred as instance of class?
Answer:
(i) Object is an identifiable entity with some characteristics and behaviour. Class is a collection of object with similar characteristics.

(ii) Object is called instance of class as object helps in accessing the class members and functions to get the required output.

(e) Differentiate between linear search and binary search.
Answer:

Question 3
(a) What is other name of java interpreter? Explain it.
Answer:
JVM (Java virtual machine): It is used to convert java byte code to machine code which can be understood by the computer running on any operating system.

(b) Name the java keyword
(i) used to finish the execution of the method.
(ii) used to implement the concept of inheritance.
Answer:
(i) exit or return
(ii) extends

(c) Attempt the following:
(i) Assign the constant value pi as 3.14 to variable using suitable data type?
(ii) Give difference between unary and binary operators.
(iii) Give examples of each
(i) Composite date type.
(ii) Escape sequence.
(iii) Comment lines
(iv) Wrapper class
(iv) Write any two rules of naming variable
(v) Differentiate between type conversion and coericion.
(vi) State the difference between final and finally.
(vii) a. State the use of toString( ) and valueOf( ).
b. Write a statement to extract the last word of the string str.
(viii) a. What is called byte code?
b. Explicit and implicit type conversion.
Answer:
(i) double const pi =3.14;
(ii) Unary operator is is used for one operand.
Binary operator is used for two operands.
(iii) (i) Array, class
(ii) “\n”‘;\\’
(iii) //or/*java*/
(iv) Character, Integer
(iv) Variables should not be keyword and it should not start with digit or special character except for the $ and & and _. It must start with alphabet.

(v) Final makes a variable constant throughout the program. Finally is a block which is always executed even if exception occurred or not.

(vi) a.

b. String word = str.substring(sr.lastlndexOf(“)+1);

(vii) a. Byte code is an specific set of instruction to be executed by the JVM.
b. Implicit type conversion: Java compiler will automatically convert one data type to another when data types are compatible.
E.g. int 1 = 10;
double b = I;
Explicit type conversion: Java compiler is to be told explicitly to do the conversion form one data type to another.
E.g.
double d = 10.0;
float f = (float)d;

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
Using switch case write a menu driven program to print the patterns.
(a)
0 0 0 0 0
2 2 2 2
6 6 6
12 12
20

(b)
X
YY
XXX
YYYY
XXXXX
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter the choice:");
int a1 = sc.nextlntO;
switch(al)
{
case 1: int a =0; int b = 2;
for(int i =5;i>= 1;i—)
{
for(int j=1; j<=i;j++)
System.out.print(a+""); -
a+=b;
b+=2;
System.out.println( );
}
break;
case 2: for(int i =1 ; i<=5; i++)
{
for(intj=1;j<=i;j++)
{
if(j%2 != 0)
System.out.printC'X");
else
System.out.printC'Y");
}
System.out.printlnO;
}
break;
default: System.out.println("lnvalid Choice");
}
}//end of main 
}//end of class

Question 5
Write a program to print the frequency of the digits occurring in number.
Eg.2566773
Output:
2 1
5 1
6 2
7 2
3 1
Answer:

import java.util.*; 
class Main {
static int frequency(int number, int digit)
{
int count = 0;
while (number > 0)
{
if (number % 10 == digit) count++;
number = number / 10;
}
return count;
}
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in);
System.out.println(''Input the number:");
int n = sc.nextlnt( );
int a = n;
int search = 0;
int countdigit = 0;
int []arr = new int[10];
while(a >0)
{
search = a%10;
countdigit = frequency(n,search);
if(countdigit>0)
{
arr[search]=countdigit;
countdigit=0;
}
a=a/10;
}
for(int i =0; 
i<arr.length;i++)
{
if(arr[i]>0)
System.out.println(i+"\t"+arr[i]);
}
}//end of main
}//end of class

Question 6
Write a class with a special member function to input a multi-digit number(max 9 digit) and print the following:
(i) total number of even and odd digits
(ii) the reverse number
(iii) total number of zeros present.
Answer:

import java.util.*; 
class Main {
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in);
System.out.priintln("lnput the number:");
long a = sc.nextlntQ;
int sumeven =0;
int sumodd =0, sum3 = 0;
String str - long a1 = a;
while(a1 <=999999999&&a1 !=0)
{
int k= (int)al %10;
str+=lnteger.toString(k);
if(k%2 == 0)
sumeven++;
else if(k%2!=0)
sumodd++;
else if (k==0)
sum3++;
else;
a 1 =a 1/10;
}
System.out.println("No. even: "+sumeven+"\t"+ "odd:"+sumodd+"\ t"+"zero: "+sum3+"\t"+"Reverse no:"+str);
}//end of main 
}//end of class

Question 7
Write a class to input a string (combination of letters and digits) and replace the repecated characters with star(*) sign. Then display both old and newly created string.
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc=new Scanner(System.in); 
System.out.println("Enter a sentence:"); 
String str=sc.nextLine( );
for(int i=0;i<str.length( );i++)
{
char ch=str.charAt(i); if(ch!='*')
{
for(int j=str.length( )-1;j>i;j—)
{
char ch 1 =str.charAt(j); jf(ch—chi)
{
StringBuffer strl =new StringBuffer(str);
str1.setCharAt(j,'*');
str=""+strl;
}
}
}
}
System.out.println(str);
}//end of main 
}//end of class

Question 8
Write a program to print the following pattern by taking the input n from the user.
Note: n determines number of rows.
Eg. n = 4
Output:
* * * *
* * *
* * * *
* * *
Answer:

import java.util.*;
class Main {
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in); 
System.out.println("lnput the number:"); 
int n = sc.nextlnt( ); 
for(int i = 1; i <=n;i++)
{
if(i%2==0)
{
for(int j =1; j<=3;j++) 
System.out.printC *");
}
else
{
for(int j =1; j<=4;j++)
System.out.printC*");
}
System.out.println( );
}
}//end of main 
}//end of class

Question 9
Write a java class to calculate and print the electricity bill to be paid by a customer.
Assume that the customer pays a rent of Rs.350.00
No. of units — Charge per unit
Upto 100 units — Rs. 1.50
For the next 100 units — Rs. 2.00
For next 50 units — Rs. 2.50
Beyond 250 units — Rs. 4.00
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc=new Scanner(System.in); 
double fixed_price = 350.0; 
double amt = 0.0;
System.out.println("Enter a unit of electricity consumption: ");
int n=sc.nextlnt( );
if(n<=100)
amt+= amt+1.5*n;
else if(n>100&&n<=200)
amt+= 100*1,5+(n-100)*2.0;
else if(n>200&&n<=250)
amt+= 100*1.5+0 00)*2.0 + (n-200)*2.5;
else
amt+= 100*1.5+0 00)*2.0 + (50)*2.5+(n-250)*4.0;
System.out.println("Electricity bill amount: "+amt);
}//end of main 
}//end of class

ICSE Class 10 Computer Applications Question Papers with Answers

ICSE Class 10 Computer Applications Sample Question Paper 10 with Answers

Section – A
Attempt all questions

Question 1
(a) What do you mean by abstraction.
(b) Using an example explain the term object.
(c) What is wrapper class.
(d) State the use of new operator.
(e) Write a java expression for square root of sinx.
Answer:
(a) Abstraction is the act of representing the essential features of the program without involving in its complexity.

(b) Eg. While using computer user is not concerned about the different parts of the computer only needs to know about usage. Characteristics (big, small, flat etc)

(c) Wrapper class is a class which helps to convert a primitive data type to object type. E.g. Integer, Short etc.

(d) New operator supports instantiations. It is used to allocate memory space to the newly created object.
E.g. Scanner sc = new Scanner(System.in)

(e) double d = Math.sin(x*3.14/180);

Question 2
(a) Differentiate between local variable and global variable.
Answer:

(b) What is the purpose of default in switch statement?
Answer:
When none of the cases of the switch statement are satisfied, the default case is used and executed in the program.

(c) Define an impure function.
Answer:
An impure function is a function where values of the arguments keep changing during the execution of the program.

(d) What is called default constructor?
Answer:
A default constructor is a constructor without any parameters. It is used to assign a default value to the class variables.

(e) Explain the concept of constructor overloading using an example.
Answer:

class lol
{
int a; int n;
lol( )
{
a=0;
}
lol(int c)
{
a=1;
}
public static void main( )
{
lol obj = new lol( );
 lol obj1=new lol(2);
}
}

Question 3
(a) How java make use of formal and actual parameter?
Answer:
Formal parameters are used in the function definition of the program while actual parameters are used in the function call statement.

(b) State the java concept that is implemented into smaller groups
(i) Dividing a long set of instruction into smaller groups and modules.
(ii) Wrapping up of data and its associated function into a class.
Answer:
object oriented programming Encapsulation

(c) Attempt the following:
(i) What is role of access specifier?
(ii) Why is java platform independent?
(iii) Differentiate between public and private visibility label.
(iv) Int a = 7,b = 6; b = a>b?a!=0?3:b<10?9:4:8; System.out.println(b);
(v) Int a = 7,b = 6; b=++a+ ++a/ ++a; System.out.println(b);
(vi) What are functions? Give one advantage of using functions.
(vii) How do objects communicate with each other?
(viii) What are two types of methods? Give two concrete differences between them and include example of each type of function from java.lang.Math class.
Answer:
(i) Access specifiers are used to moderate the accessibility of the data according to user’s choice.
(ii) Java is platform-independent because the JVM can interpret the byte code which can run on any platform.
(iii) Public: It can be accessed anywhere.
Private: It can be accessed only inside the class.
(iv) 3
(v) b=8+9/10=8+0=8
(vi) A function is block of statements in a java program used to perform certain tasks. It organizes the data into segments and helps in performing tasks easily.
(vii) Objects communicate with each other using methods.
(viii)

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
A Smith number is a composite number, the sum of whose digits is the sum of the digits of its prime factors obtained as a result of prime factorization(excluding 1).
The first few such numbers are 4,22,27,58,85,94,121
eg.666
Prime factors are 2,3,3 and 37
Sum of the digits are (6+6+6) = 18
Sum of the digits of the factors (2+3+3+3+7)=18
Write a program to input a number and display whether the number is a Smith number or not.
Answer:

import java.util.*; 
class Main {
int sumDigfint n) 
{
int sum=0; while(n>0)
{
sum+=n%10;
n=n/10;
}
return sum;
} 
int sumPrimeFact(int n)
{
int i=2, sum=0; while(n>1)
{
if(n%i-=0)
{
sum=sum+sumDig(i);
n=n/i;
}
else
i++;
}
return sum;
}
public static void main(String[ ] args)
{
Main ob=new Main( );
Scanner sc = new Scanner(System.in);
System.out.print("Enter a Number:");
int n=sc.nextlnt( );
int a=ob.sumDig(n);
int b=ob.sumPrimeFact(n);
if(a==b)
System.out.print("lt is a Smith Number"); else
System.out.print("lt is Not a Smith Number"); 
}//end of main 
}//end of class

Question 5
Write a program to assign a full path and file name as given below. Using library functions, extract and output the file path, file name and file extension separately as shown.
Input: C:\users\sid\pictures\cricket.jpg
output: C:\users\sid\pictures
File name: Cricket
Extension: jpg
Answer:

import java.util.*; 
class Main {
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in); 
System.out.priintlnflnput the file path:");
String str = sc.nextLine( );
String strl = str.substring(0,str.lastlndexOf('\V)); 
String str2 = str.substring(str.lastlndexOf('\V)+1); 
String str3 = str2.substring(str2.indexOf(' ’)+1); 
System.out.println("Path:" +str1); 
System.out.println("Filename:"+str2); 
System.out.println("Extension:"+str3);
}//end of main 
}//end of class

Question 6
Write a program to input a word from user and remove the consecutive repeated characters by replacing the sequence of repeated characters by its single occurrence.
input: ssiiddaarrtth
Output: sidarth
Answer:

import java.util.*;
class Main {
public static void main(String args[ ])
{
String word ="";
Scanner sc = new Scanner(System.in);
System.out.println("lnput the sentence:");
String str = sc.nextLine( ); char chprev='';
for(int i =0;i<str.length( );i++)
{
char ch = str.charAt(i); 
if(chprev!=ch)
{
word+=ch; chprev = ch;
}
else
continue;
}
System.out.println("word without successive repeated characters is:"+word);
}//end of main
}//end of class

Question 7
Write a program in java to input a number and check whether it is Duck number or not.
Note: A Duck number is a number which has zeroes present in it, but there should be no zero present in the beginning of the number. For example 3210, 7056, 8430709 are all duck numbers whereas 08237,04309 are not.
Answer:

import java.util .*;
class Main {
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in);
System.out.printlnC'Input the number:");
int a = sc.nextlnt( );
int a 1 = a;
int count =0;
String str = Integer.toString(a);
while(a1!=0)
{
if (str.charAt(0)==0)
break;
else
{
int k = a 1 %10; 
if(k==0) count++; a1/=10;
}
}
if(count>=1)
System.out.println("Duck no."); else
System.out.println("Not Duck no.");
}//end of main 
}//end of class

Question 8
Write a program in java to input a number in Decimal number system and convert it into its equivalent number in the octal number system.
Note: Octal number system is a number system which can represent a number in any other number system in terms of digits ranging from 0 to 7 only. This number system consists of only eight basic digits i.e. 0,1,2,3,4,5,6 and 7.
eg. 25 in the decimal number system can be represented as 31 in the octal number system.
Answer:

import java.util.*; 
class Main {
public static void main(String args[ ])
{
Scanner sc = new Scanner(System.in); 
System.out.println("lnput the decimal number:"); 
int a = sc.nextlnt( ); 
int a1 =a%8; 
int a2 = a/8;
String str=" "; 
int a3=a2%8;
String strl = Integer.toString(al);
String str2 = lnteger.toString(a3); 
str=str2+str1;
int ah = Integer.parselnt(str); 
System.out.print(ah);
}//end of main
}//end of class

Question 9
Using Scanner class, write a program to input a string and display all those words of the strings which begins with capital letter and end with a small letter.
Sample Input: We all love Java for School Students because of its Uniqueness
Sample Output: We Java School Students Uniqueness
Answer:

import java.util.*; 
class Main {
public static void main(String args[ ])
{
String word =
Scanner sc = new Scanner(System.in);
System.out.println("lnput the sentence:");
String str = sc.nextLine( ); str+="";
for(int i =0;i<str.length( );i++)
{
char ch = str.charAt(i);
if(ch!='') word+=ch; 
else {
jf(Character.isUpperCase(word.charAt(0))&&Character.isLowerCase(word. charAt(word.lengthO-1)))
{
System.out.print(word+"");
}
word =
}
}
} //end of main 
}//end of class

ICSE Class 10 Computer Applications Question Papers with Answers

ICSE Class 10 Computer Applications Sample Question Paper 9 with Answers

Section- A (40 Marks)
Attempt all questions

Question 1
(a) What is the return of following function.
(i) equals( )
(ii) rint( ).
(b) What do you mean by compound statement. When do you need it.
(c) Explain difference between character constant and string constant.
(d) State any two features of constructor.
(e) Define abstraction.
Answer:
(a) (i) boolean
(ii) double

(b) A set or a block of statement in a program is called compound statement. It can be used to divide the program into segments and organise the data accordingly.

(c)

(d) It has same name as that of class. It has no return type.
(e) Abstraction is the act of representing the essential features of a program without involving in its complexity.

Question 2
(a) Explain the term object using example?
(b) What is the wrapper class. Justify with example?
(c) State the purpose of new operator?
(d) Write java expression for
\(\sin x+\sqrt[2]{a x^{2}-b x+c}\)
Answer:
(a) Object is an identifiable entity with some particular characteristics and behaviour.
E.g.TV, characteristics: Big, small etc.
Behaviour: Show different channels, off/on etc.
(b) The class which helps in converting primitive data types to object type is called wrapper class. Eg. Character, Integer etc.
(c) The ‘new’ keyword supports instantiation. It allocates memory for the newly created object.
(d) double z = Math.sin(x)+Math.sqrt(a*x*x + b*x + c);.
(e) class lol

Question 3
(a) Explain the concept of constructor overloading with example.
(b) Differentiate between equals( ) and compareTo( ).
(c) Attempt the following:
(i) Differentiate between call by value and call by reference.
(ii) What is an identifier. Give example
(iii) Name the package that contains the scanner class. Which unit or class gets called when object is created.
(iv) What is meant by encapsulation.
(v) What is meant by inheritance.
(vi) char a[ ]={‘a’,’b’,,c’}; System.out.println(a); What will be the output.
(vii) char a[ ]={‘a’,’b’,’c’}; System.out.println(a[1]++); System.out. println(++a[1]);
(viii) inta[ ]={1,2,3};System.out.println(a[1]++);System.out.println(++a[1]);
Answer:
(a) Same as above.

(b)

(c) (i)

(ii) Identifiers are those quantities which change their values during the execution of the program. E.g. Int a, b;

(iii) java.util and constructor.

(iv) Encapsulation: Wrapping of data and its associated functions into a single unit.

(v) Inheritance is the method of inheriting the properties of one class from another class. The class which derives its own properties is called base class and the class which derives the properties of another class is called sub class.

(vi) Address of array a[ ]

(vii) b d

(viii) 2

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
Write a program to print the sum of prime digits from given number.
E.g. 134667
Output: 1+3+7=11
Answer:

import java.util.*;
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("enter the number:"); 
int a = sc.nextlnt( ); 
int a 1 = a; int sum = 0; while (a 11=0)
{
int count = 0; int k = a1%10;
for(int i=1; i<=k; i++)
{
if(k%i==0) count++;
}
if(count==2) sum+=k; a 1 /=10;
}
System.out.println("sum = "+sum); 
}//end of main 
}//end of class

Question 5
Write a program to print the longest word from the sentence and print the number of characters of the longest word.
Answer:

import java.util.*; 
class Main
{
public static void main(String [ ] largs)
{
int count = 0; String temp;
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a sentence:"); 
String str = sc.nextLine( ), 
word =""; str - str+" ";
for(int i = 0; i<str.length( ); i++)
{
char ch = str.charAt(i);
if(ch=='') count++;
}
String a[ ] = new Stringfcount]; 
for(int i = 0; i<count;i++)
{
for(int j = 0;j< str.length( ); j++)
{
char ch = str.charAt(j);
if(ch!='') word+=ch; 
else {
a[i] =word; word ="
}
}
}
for(int i = 0;i<a.length; i++)
{
for(int j = 0;j<a.length-i-1;j++)
{
if(a[j].length() > a[j+1].length())
{
temp = a[j]; a[j]=a[j+1]; a[j+1]=temp;
}
}
}
System.out.printlnfLONGESTWORD: "+a[a.length-1]); 
System.out.println("No. of characters:"+a[a. length-1 ].length()); 
}//end of main 
}//end of class

Question 6
Write a program to find sum of negative numbers, sum of positive odd numbers and sum of positive even numbers entered by user and list terminates when user enters 0.
Answer:

import java.util class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
int sum = 0, sum1 = 0, sum2 = 0;
System.out.println("Enter the number to calculate and 0 for exit:"); 
int n = sc.nextlnt( ); int a = n; while(a!=0)
{
if(a>0)
{
if(a%2 == 0)
sum1+=a;
else
sum2+=a;
}
else
{
sum+=a;
}
System.out.println(''Enter the next number and 0 to exit:"); 
a = sc.nextlnt( );
}
System.out.println("Positive even sum: "+suml+"\t"+"Positive odd sum:"+sum2+"\t"+"Negative sum:"+sum);
} //end of main 
}//end of class

Question 7
Using switch case write a menu driven program to print the patterns.
(a)
0 0 0 0 0
2 2 2 2
6 6 6
12 12
2 0

(b)
X
Y Y
X X X
Y Y Y Y
X X X X X
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
System.out.println(''Enter the choice:");
intal = sc.nextlnt( ); switch(al)
{
case 1: inta = 0; int b = 2;
for(int i =5;i>= 1;i—)
{
for(int j=1; j<=i;j++)
System.out.print(a+" ");
a+=b;
b+=2;
System.out.println( );
}
break; case 2:
for(int i =1; i<=5; i++)
{
for(int j=1;j<=i;j++)
{
if(j%2 != 0)
System.out.printC'X");
else
System.out.printC'Y'');
}
System.out.println( );
}
break;
default: System.out.println("lnvalid Choice");
}
}//end of main 
}//end of class

Question 8
Write a program to find using binary search method from list of roll numbers entered by user in ascending order. If the search is successful print “you are selected to go” else print “Try next time”.
Answer:

import java.util.*; 
class Main {
public static void main(String args[ ])
{
int first, last, middle, n, search, array! ];
Scanner sc = new Scanner(System.in);
System.out.println(''Enter total number of students");
n = sc.nextlntO; array = new int[n];
System.out.printlnC'Enter" + n + " integers"); 
for (int i = 0; i<n; i++) arrayti] = sc.nextlnt( );
System.out.printlnC'Enter value to find");
search = sc.nextlnt( ); first = 0; last = n - 1;
middle = (first + last)/2; while(first <= last)
{
if (array[middle] < search)
first = middle + 1;
else if (array[middle] == search)
{
System.out.println(search + " you are selected to go " + (middle + 1) + "•"); break;
}
else
last = middle - 1; 
middle = (first + last)/2;
}
if (first > last)
System.out.println(search + " Try next timeAn");
}//end of main 
}//end of class

Question 9
Write a program to input sentence and print in the lowercase letters and replace all the words like “is” and “are” with “were” and “had” and “has” with “had”.
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in); 
System.out.println("Enter the sentence:"); 
String str = sc.nextLine( );
String str1 = str.toLowerCaseQ;
String word = strl +=" ";
String str2 =" ";
for(int i =0;i<str1 Jength(); i++)
{
char ch = strl .charAt(i);
if(ch!='') word+=ch;
else {
if(word ,equals("is")) str2=str2+"were"+"";
else if(word.equals("are")) str2=str2 + "had"+""; 
else if(word.equals("has")) str2=str2+"had" +""; else
str2=str2+word+" "; word =
}
}
System.out.println(str2);
}//end of main 
}//end of class

ICSE Class 10 Computer Applications Question Papers with Answers

ICSE Class 10 Computer Applications Sample Question Paper 8 with Answers

Section – A
Attempt all questions

Question 1
(a) What is an array. Write the ground syntax for declaring the array.
(b) What is conditional /selection statement in java? Name the operator used for condition checking in java.
(c) What is composite data type. Explain using example.
(d) Which elements of java program represents characteristics and functions of an object.
(e) Define Polymorphism. Which part of the function differentiates between overloaded functions?
Answer:
(a) Array is set of data of the same type.
Eg. inta[ ] = {1,2,3,4,5};
(b) Conditional statements are used to check a condition and print the output accordingly. Ternary operator.
(c) A set of primitive data type is a composite datatype. Eg. Array, Class etc.
(d) Methods and data
(e) The ability to represent a thing in more than one form. The parameters of the function differentiates between the overloaded functions.

Question 2
(a) What do you mean by function signature in java?
(b) Public static void main( ) why is main method declared as static?
(c) int i=3; i+=(i++*2)+ – – i*i++ + ++i/2; System.out.println(i); what is the output of the above code?
(d) Why is the string class called as immutable class.
(e) What’s the use of exception handling in java code:
try{ //code here }catch(IO Exception e)
{//some code here }what is the use of e.
Answer:
(a) Function signature is the part which defines the return type, parameters and visibility of a method.
(b) Main method is declared static because only one copy of the main method is used in the program.
(c) 3 + 6 + 9 + 2 = 20.
(d) String is immutable because once it is stored, it cannot be altered during the execution of the program.
(e) It is used to find the run time errors and catch those errors gracefully, e is object of IO exception class it is used as input to the catch function.

Question 3
(a) Why is binary search called as divide and conquer.
Answer:
Binary search is called divide and conquer because it divides the array into the equal halves and finds the search element in the lower half and upper half of array accordingly.

(b) Differentiate between private and protected access modifiers.
Answer:
Private: accessibility of data or methods is only inside class.
Protected: accessibility of data or methods is only in subclass and package.

(c) Attempt the following:
(i) Find the output of the following code
int a=5,b=6,c=9; int g = a>b?a>c?a:c:(b>c)?b:c;
(ii) Differentiate between length and lengthO function.
(iii) Define class variable vs instance variable
(iv) Write java expression for the following;
\(\frac{\cos x+\sin x}{3.14^{*} \sqrt{x}}\)
(v) What is the source code in java and what is its extension.
(vi) Write one difference between
(i) char type and String type
(ii) “true” and true.
(vii) State the escape sequence for vertical tab and new line feed.
(viii) Which unit of the class gets called when object is created? Give an example
Answer:
(i) 9
(ii) length is used to find the length of array.
Length( ) is used to find length of string.

(iii)

(iv) double x = (Math.cos(x*3.14/180) + Math.sin(x*3.14/180))/ (3.14*Math.sqrt(x));

(v) Source code in java is the set of commands in java to be executed by the JVM. Extension is .java.

(vi) (i)

(ii) “true” – String value
true – boolean value
(vii) “\t”and”\n‘
(viii) Constructor
E.g.

Class lol
{
Int a;
lol( )
{
a=10;
}
Public static void main( )
{
lol obj = new lol( );
}
}

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
Write a program to accept the word from user and print the pattern as shown below:
Sample input: COMP
Output:
C
CO
COM
COMP
COM
CO
C
Answer:

import java.util.*;
class lol {
public static void main()
{
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a word"); 
String str = sc.next( ); 
for(int i =0; i<str.length( ); i++)
{
for(int j =0; j<=i; j++)
{
char ch = str.charAt(i);
System.out.print(ch+" ");
}
System.out.println( );
}
for(int i = str.length( )-2; i<=0; i- -)
{
for(int j = 0; j<=i; j- -)
{
charch = str.charAt(j);
System.out.print(ch+" ");
}
System.out.println( );
}
}//end of main 
}//end of class

Question 5
Using switch…case write a menu driven program to print
‘p’:
S
SS
ASS
LASS
CLASS
x’:
\(x^{1}+\frac{1}{2 !} x^{2}+\frac{1}{3 !} x^{3}+\ldots \frac{1}{n !} x^{n}\)
Answer:

import java.util.*; 
class Main {
public static void main(String[ ] args)
{
Scanner sc = new Scanner(System.in);
System.out.println(''Enter p for printing pattern and x for summation series");
charch = sc.next( ).charAt(0); switch(ch)
{
case 'p': String str ="CLASS"; for(int i = 0; i<str.length(); i++)
{
for(int j =str.length()-1 -i; j<str.length(); j++)
{
System.out.print(str.charAt(j));
}
System.out.println( );
}
break;
case 'x': System.out.println("Enter the value of x and n"); 
double x = sc.nextDouble( ); 
int n = sc.nextlnt( ); 
double sum = 0.0; 
for(int i =1; i <=n; i++)
{
double fact = 1; for(int j = 1; j <=i; j++) fact*=j;
sum=sum+Math.pow(x/i)/fact;
}
System.out.println("sum:" +sum); break;
default: System.out.println("Error"); break;
}
}
}

Question 6
Write a program to accept sentence from user and print number of words which starts with vowel and ends with vowel.
Input: india is greatest country
Output: 1
Answer:

import java.util.*; 
class lol {
public static void main( )
{
int count =0;
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a sentence:");
String str = sc.nextLine( ), word =""; 
for(int i =0; i<str.length(); i++)
{
char ch = str.charAt(i);
if(ch!='')
word = word + ch; 
else {
char chi =word.charAt(0);
char ch2 = word.charAt(word.length()-1);
if((ch1=='a' || ch1=='A' || chi == 'e'|| ch1 == 'E* || chi =='i,||ch1==T|| 
ch1 -='u'||ch1 =='U'||ch1 =='o'||chl =='0')&&(ch2=='a' || ch2==A' || ch2 == 'e'|| ch2 == 'E' || ch2=='i,||ch2==T||
ch2=-,u,||ch2=='U'||ch2==,o,|| ch2=='0'))
{
count++;
}
word
}
}
System.out.println(count);
}//end of main 
}//end of class

Question 7
Write a program to accept a sentence from the user and convert it into uppercase and display the isogram words available in the sentence and also display the count of such words.
(Isogram are words without repetition of the characters)
Input: An important part of life
Output: An part of life
Answer:

import java.util.*; 
class Main {
public static void main(String [jargs)
{
int count =0;
Scanner sc = new Scanner(System.in);
System.out.println("Enter a sentence:");
String str_ = sc.nextLine( ), word =" ";
String str = str_.toUpperCase( );
for(int i =0; i<str.length( ); i++)
{
char ch = str.charAt(i); if(ch!='')
word = word + ch; 
else 
{
char [ ]str1 = word.toCharArray( ); 
for(int k = 0; k<str1 .length-1; k++)
{
for(int j = 0; j<str1 .length—k—1; j++)
{
if(str1[j]>str1[j+1])
{
char temp = strltj]; 
str 1 [j] = str 1 [j+1 ];
str1 [j+1] = temp;
}
}
}
int flag = 0;
for(int m =0; m < str1 .length-1; i++)
{
if(str1[m] == strl [m+1 ])
{
flag = 1; break;
}
}
if(flag==0)
{
System.out.print(str1+""); count++;
} 
word
}
}
System.out.priintln(count);
}//end of main }//end of class

Question 8
Write a program to accept names of 20 students and the total marks scored by them. Arrange the names as per the rank list with maximum marks at the top. Display the final names of the students along with their total marks scored.
Answer:

import java.util.*; 
class lol {
public static void main( )
{
String temp; double tempi;
Scanner sc = new Scanner(System.in);
String at ] = new String[20];
double b[ ] = new double[20]; 
for(int i =0; ka.length; i++)
{
System.out.println("Enter name & marks:"); 
a[i] = sc.nextLineO; 
b[i] = sc.nextDoubleO;
}
for(int i =0; ka.length; i++)
{
for(int j=0;j<a. length-1 -i; j++)
{
if(b[j] <b[j+1])
{
temp = a[j]; a[j] = a[j+1 ]; 
a[j+1] = temp; tempi = b[j];
b[j] = b[j+l]; b[j+1] = temp1;
}
}
}
System.out.println("Name" + "\t" + "Marks"); 
for(int i =0; i<a.length; i++) 
System.out.println(a[i]+"\t"+b[i]);
} //end of function main 
}//end of class

Question 9
Write a program to accept a word in upper case and display the position of each alphabet i.e A as 1 B as 2 …Y as 25 and Z as 26.
Sample Input: CAT
Sample Output:
C3
A 1
T 20
Answer:

import java.util.*; 
class lol 
{
public static void main( )
{
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a word:");
String str = sc.next ( );
String strl = str.toUpperCase( );
forfint i =0; i<str.length( ); i++)
{
char ch = str.charAt(i); inta = ch-64;
System.out.println(ch+"\t"+a);
}//end of function main 
}//end of class

ICSE Class 10 Computer Applications Question Papers with Answers

ICSE Class 10 Computer Applications Sample Question Paper 7 with Answers

Section – A (40 Marks)
Attempt all questions

Question 1
(a) (i) Name the keyword that makes the variable constant in a program.
(ii) Name the keyword that makes the system to report an error.
a. Differentiate between equals!) and equalslgnoreCase( )
b. What is the use of access specifier. Name any two.
c. String si = “computer” , s2 =”computers”; System.out.
i println(s1.compareTo(s2);
d. Differentiate between linear search and binary search.
Answer:
(a) (i) final
(ii) throws

(b)

(c) Access specifiers are used to limit the visibility of data according to the users choice.
Eg. private, public.
(d) -1
(e)

Question 2
(a) Write the memory occupied in computer in bytes for array a[5] of character data type.
Answer:
10 bytes 24 bytes

(b) Differentiate between length!) and length functions.
Answer:

(c) What is error? How logical error differ from syntax error?.
Answer:
When there is an improper use of statement or statement is logically incorrect then an error is displayed.
Syntax error is displayed when there is improper use of basic java statements.
Logical error is displayed when statement is not giving correct output after execution.

(d) Name the methods of scanner class that:
(i) Is used to input an integer data from standard input stream.
(ii) Is used to input a string data from standard input stream.
Answer:
(i) nextlnt( )
(ii) nextLine( ) or next( )

(e) Write the statement to perform the following task:
(i) To find and display the position of the first space in the string str
(ii) To find and display the position of the last space in string str.
Answer:
(i) System.out.printlnC’COMP IS FUN”.indexOf(”));
(ii) System.out.printlnC’COMP IS FUN”.lastindexOf(”));

Question 3
(a) The arguments of the function given in the function definition are called …………
Answer:
formal parameters

(b) Why JVM is required for running java program. Justify your answer.
Answer:
JVM is used to convert the byte code into machine language which can be run on any machine. In java, the compiler produces machine code for a particular system. Java compiler produces code for a Virtual Machine known as Java Virtual Machine.

(c) Attempt the following:
(i) What is called type casting in java. Explain with example.
(ii) Write all the possible correct syntaxes of declaring array.
(iii) What is the purpose of new operator. Why is it useful?.
(iv) double as =Math.pow(“214”.indexOf(‘4’,3));
(v) char a[ ] = {‘j’/a’/v’/a’};
int c = 1;
System.out.pritnln(a[++c]);
System.out.pritnln(a[c]++);
(vi) Explain the use of return statement in the java.
(vii) State the purpose and return data type of the following String functions:
(i) indexOf( )
(ii) compareTo(  )
(viii) State the output of the code:
int m = 25;
int n = 100;
for(int 1 = 1; i<5; i++);
m++; -n;
System.out.println(“m=”+m);
System.out.println(“n=”+n);
Answer:
(i) The conversion of data from one data type to another datatype is called typecasting.
Eg. char ch =’A’;
Int chi = ch;
(ii) int a[ ] = new int [10]; int a[ ];
int a[ ] = {1,2,3};
(iii) The purpose of new operator is to allocate memory to the object. It is helpful in the creation of new object.
(iv) 8.0
(v) (i) v (ii) a
(vi) It is the keyword in java to return from the method with value or without value.
(vii) (i) Find the index of a character return type is integer.
(ii) Compares two strings return type is integer.
(viii) m=20,n=9

Section – B (60 Marks)
Attempt any four questions from this Section

The answers in this Section should consist of the Programs in either Blue J environment or any program environment with Java as the base. Each program should be written using Variable descriptions/Mnemonic Codes such that the logic of the program is clearly depicted. Flow-Charts and Algorithms are not required.

Question 4
Write a program to accept the word from user and print the pattern as shown below:
Sample Input: COMP
Output:
C
CO
COM
COMP
COM
CO
C
Answer:

import java.util.*; 
class lol {
public static void main( )
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter a word");
String str = sc.next( );
for(int i =0; i<str.length( ); i++)
{
for(int j =0; j<=i;j++)
{
charch = str.charAt(i);
System.out.print(ch+" ");
}
System.out.println( );
}
for(int i = str.length( ) - 2; i<=0; i- -)
{
for(int j = 0; j<=i; j- -)
{
char ch = str.charAt(i); 
System.out.print(ch+" ");
}
System.out.println( );
}
}//end of main 
}//end of class

Question 5
Write a program to accept the 15 names in the array and arrange them in alphabetical order by bubble sort technique only. And print the output list.
Answer:

import java.util.*; 
class lol
{
public static void main()
{
String temp;
String a[ ] = new Stringfl 5];
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a 15 names");
for(int i =0; ka.length; i++)
{
a[i] =sc.nextLine();
}
forfint i = 0; i<a.length; i++)
{
for(int j =0; j<a.length-i-1; j++)
{
if(a[j].compareTo(a[j++])>0)
{
temp = a[j]; a[j]=a[j+1]; 
a[j+1] = temp;
}
}
}
for(int i =0; ka.length; i++)
{
System.out.println(a[i]);
}
}//end of main 
}//end of class

Question 6
Write a program to accept sentence from user and print number of words which starts with vowel and ends with vowel.
Input: india is greatest country
Output: 1
Answer:

import java.util.*; 
class lol
 {
public static void main( )
{
int count =0;
Scanner sc = new Scanner(System.in);
System.out.priintln("Enter a sentence:");
String str = sc.nextLine( ), word ="";
 for(int i =0; i<str.length( ); i++)
{
char ch = str.charAt(i); if(ch!='')
word = word + ch; else {
char ch1 =word.charAt(0);
char ch2 = word.charAt(word.length()-1);
if((ch1=='a' || ch1=='A' || chi == 'ej| chi == 'E' || chi ==,i,||chl ==T|| ch1=='u'||ch1=='Uj|ch1=='oj|ch1==,0')&&(ch2=='a' || ch2=='A' || ch2
== 'e'|| ch2 == 'E' || ch2=='i'||ch2==THch2=='uj|ch2=='Uj|ch2=-oj| ch2=='0')) 
{ . count++;
}
word
}
}
System.out.println(count);
}//end of main
}//end of class

Question 7
Write a program to arrange the words in sentence given by user in alphabetical order. Assume input is in lower case letters only.
Input: india is my country
Output: country india is my
Answer:

import java.util.*; 
class lot
{
public static void main( )
{
int count =0;
Scanner sc = new Scanner(System.in); 
System.out.println("Enter a sentence:"); 
String str = sc.nextLine( ), 
word = str = str+" ";
forfint i =0; i<str.length(); i++)
{
char ch= str.charAt(i); if(ch =='') count++;
}
String a[ ] = new Stringfcount];
String temp;
forfint i =0; i<str.length(); i++)
{
char ch = str.charAt(i); if(ch!='') word+= ch;
else
{
int j = 0; a[j]=word; word ="
j++;
}
}
for(int i =0; i<a.length; i++)
{
for(int j =0;j<a.length-i-1; j++)
{
if(atj].compareTo(a[j+1 ])>0)
{
temp = a[i]; a[j] = a[j+1]; 
a[j+1] = temp;
}
}
}
for(int j =0; j<a. length; j++)
{
System.out.print(a[j]+" ");
}
}//end of main 
}//end of class

Question 8
Write a program to accept integer values in the array and find the second lowest value from the array without sorting the array.
inta[ ] = {3.10.4,8,12,6,23}
Output: 4
Answer:

import java.util.*; 
class lol {
public static void main( )
{
int count = 0; 
int sum = 0;
Scanner sc = new Scanner(System.in);
int a[ ] = new int[10]; 
System.out.println("Enter 10 values:"); 
for(int i =0; ka.length; i++)
{
a[i] = sc.nextlnt( );
}
int low=( );
int secondlow=low;
for(int i =0; i<a.length; i++)
{
if(low >a[i])
{
secondlow=low; low = a[i];
}
}
System.out.println(secondlow); 
}//end of main 
}//end of class

Question 9
Write a function to display the given pattern: void pattern (int n)
Note: n is the number of rows:

Answer

import java.util.*; 
class lol
{
public void pattern(int n)
{
int n = 5; 
int 1 = 0;
for(int i =1; i<=n; i++)
{
int k = 1; 
for(int j = 1; j<=i; j++)
{
System.out.print(k+" "); 
k+=2;
}
int 11 = I;
for(int j = 2;j<=i;j++)
{
System.out.print(l1+" "); 11 ++;
}
1+=2;
System.out.println( );
}
}
//end of function pattern
//end of class

ICSE Class 10 Computer Applications Question Papers with Answers