Computer Applications Official 2022-2023 (English Medium) ICSE Class 10 Question Paper Solution

A mechanism where one class acquires the properties of another class:

Polymorphism

Inheritance

Encapsulation

Abstraction

A Identify the type of operator &&:

ternary

unary

logical

relational

The Scanner class method used to accept words with space:

next()

nextLine()

Next()

nextString()

The keyword used to call package in the program:

Extends

Export

Import

Package

What value will Math.sqrt (Math.ceil (15.3)) return?

16.0

16

4.0

5.0

The absence of which statement leads to fall through situation in switch case statement?

Continue

Break

Return

System.exit(0)

State the type of loop in the given program segment

for (int i = 5; i l = 0; i =2)

System.out.println(i);

finite

null

infinite

fixed

Write a method prototype name check() which takes an integer argument and returns a char:

char check()

void check (int x)

check (int x)

char check (int x)

The number of values that a method can return is ______.

1

2

3

4

Predict the output of the following code snippet: String P = "20", Q = "22";

int a = Integer.parseInt(P);

int b = Integer.value0f(Q);

System.out.println(a + " " + b);

20

2220

20 22

22

The String class method to join two strings is ______.

concat(String)

<string>.joint(string)

concat(char)

Concat()

The output of the function "COMPOSITION". substring(3, 6):

POST

MPO

POS

MPOS

int x = (int) 32.8; is an example of ______ typecasting.

impiicit

automatic

explicit

coercion

The code obtained after compilation is known as ______.

source code

object code

machine code

java byte code

Missing a semicolon in a statement is what type of error?

Logical

Syntax

Runtime

No error

Consider the following program segment and select the output of the same when n = 10:

switch(n)
{Case 10: System.out.println(0*2);
case 4: System.out.println(n*4); break;
default : Syslem.out.println(n);
}

20
40

10
4

20, 40

10
10

A method which does not modify the value of variables is termed as ______.

Impure method 

Pure method

Primitive method

User defined method

When an object of a Wrapper class is converted to its corresponding primitive data type, it is called as ______.

Boxing

Explicit type conversion

Unboxing

Implicit type conversion

The number of bits occupied by the value 'a' is ______.

1 bit

4 bits

2 bits

16 bits

Method which is a part of a class rather than an instance of the class is termed as ______.

Static method

Non static method

Wrapper class 

String method

Write the Java expression for (a + b)^x.

Evaluate the expression when the value of x = 4;
x* = - - x + x + + + x

Convert the following do...while loop to for loop:

int x = - 10;
do

{x - -;
System.out.print(x);
}while(r >= 1);

Give the output of the following Character class method:

Character.toUpperCase('a')

Give the output of the following Character class method:

Character.isLetterOrDigit('W')

Rewrite the following code using the if-else statement:

int m = 400;
double cl). = (m>300) ? (m/10.0) * 2; (m/20.0) - 2;

Give the output of the following program segment:

int n = 4279; int d;
while(n>0)
(d=n%10;
System.out.println(d);
n=n/100;
}

Give the output of the following String class method:

"COMMENCEMENT".lastIndexOf('M')

Give the output of the following String class method:

"devote". compareTo("DEVOTE")

Consider the given array and answer the question given below:

int x[ ] {4; 7,9,66,72,0,16);

What is the length of the array?

Consider the given array and answer the question given below:

int x[ ] {4; 7,9,66,72,0,16);

What is the value in x[4]?

Name the following:

What is an instance of the class called?

Name the following:

The method which has same name as that of the class name.

Write the value of n after execution:

char ch = 'd';
int n = ch + 5;

Design a class with the following specifications:

Member methods:

void print() Display student name, age, mks and stream allocated.

Call all the above methods in main method using an object.

Define a class to accept 10 characters from a user. Using bubble sort technique arrange them in ascending order. Display the sorted array and original array.

Define a class to overload the function print as follows:

Define a class to accept a String and print the number of digits, alphabets and special characters in the string.

Define a class to accept values into an array of double data type of size 20. Accept a double value from user and search in the array using linear search method. If value is found display message "Found" with its potiition where it is present in the array. Otherwise display message "not found".

Define a class to accept values in integer array of size 10. Find sum of one digit number and sum of two digit numbers entered. Display them separately.

Example: Input: a[ ] = {2, 12, 4, 9, 18, 25; 3, 32, 20, 1}
Output: Sum of one digit numbers : 2 + 4 + 9 + 3 + 1 = 19
Sum of two disit numbers: 12 + 18 + 25 + 32 + 20 = 107