ICSE Class 10 Sample Paper 2021-2022

COMPUTER APPLICATIONS
 (Theory)
(Two hours)

Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the question paper.
The time given at the head of this Paper is the time allowed for writing the answers. 

This Paper is divided into two Sections.
Attempt all questions from Section A and any four questions from Section B.
The intended marks for questions or parts of questions are given in brackets [ ].

SECTION A (40 Marks)
Attempt all questions(2 marks each question)

Question 1.

a . What do mean by Inheritance and Polymorphism in Java?
b . Give the output of this code

int a = 9; a++;
System.out.println (a);
a -= a-- - --a;
System  .out.println (a);                  

c . What is the value stored in x and y after execution of these statements?

             double x = Math.ceil(8.3) + Math.floor(-3.2)+Math.rint(4.5);
             double y = Math.abs(Math.round(Math.max( -4.4, -9.6)));  
d . Give the total number of bytes occupied by these arrays?

1. 1. 1. int ar[25]
      2. char M[3][4]
      3. double A[12]

e . What is the output of this code? Show the working

long num=729, sum 0;
for( long y= num; y> 0; y= y/10){
      sum= sum + y % 10;
}
System.out.println("Sum of digits = "+ sum);

Question 2.

a . If int y = 10 then find int z = (++y * (y++ + 5));
b . State the result of the following statement.

System.out.print(“My Friends are \n”);
System.out.print(“Ronit \tNihir \t”);
System.out.print(“and Ananya too”); 

c . What do you mean by function overloading? Explain with the help of one example.    
d . What is the output of the following statements when executed?
          char ch[ ]= {‘I’, ‘N’, T’, E’, ‘L’, P’, ‘E’, ‘N’, ‘T’, ‘I’, ‘U’, ‘M’};
         String obj= new String(ch, 3, 4);
         System.out.println(“The result is = “+ obj
e . Differentiate between Character.toLowerCase() and Character.toUpperCase() methods. With an example.      

Question 3.     

a . Explain the statements (i) and (ii) from the following code.

char x =’a’;
(i) x+= 3;    // why will this run?
(ii) x= x +3;  //why will this gives compile time error?       

b . State the method that: 
           i. Converts a string to a primitive float data type
          ii. Determines if the specified character is an uppercase character
c . What is the difference between pure and impure function?
d . What is this keyword? Also discuss the significance 
e . State the output of this program Segment?

String str1 = ”great”;
String str2= “Minds”;
System.out.println(str1.substring(0,2). Concat(str2.substring(1)));
System.out.println(( “WH”+(str1.substring(2).toUpperCase() ))); 

f . Write a statement each to perform the following task on a string:

1. 1. 1. Extract the second last character of a word stored in the variable wd.
      2. Cheek if the second character of a string str is in uppercase.

g . Find the errors in the given program segment and re-write the statements correctly to assign values to an integer array.

int a= new int(5);
for(int i=0; i<=5; i++)
    a[i]= I; 

h . What do you mean by Punctuators? Give examples.   
i . If String n1 = “99”; and String n2=”100”; Give the output of the following:

1. 1. 1. String st= n1+n2; System.out.println (st) ;
      2. System.out.println( n1.charAt( 1 ));
      3. System.out.println( n2 + n1);
      4. System.out.printlnt (n1+ “ ”+n2); [2]

j . Write an expression for :