Computer Applications Set 1 2021-2022 (English Medium) ICSE Class 10 Question Paper Solution

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

Boxing

Explicit type conversion

Unboxing

Implicit type conversion

State the value of y after the following is executed:

char x = '7';

y = Character.isLetter(x);

false

7

true

'7'

Give the output of the following string methods.

"MISSISSIPPI".indexOf('S') + "MISSISSIPPI".lastIndexOf('I')

10

12

20

11

Corresponding wrapper class of int data type is ______

integer

INTEGER

Int

Integer

Variable that is declared within the body of a method is termed as ______

Instance variable

class variable

Local variable

Argument variable

Identify the correct array declaration statement.

int a[10];

int a[]=new int[10];

int arr[i]=10;

int a[10]=new int[];

A variable that is bounded to the object itself is called ______

Instance variable

class variable

Local variable

Argument variable

The access modifier that gives the most accessibility is ______

private

public

protected

package

Give the output of the following code.

String A = "26.0", B= "74.0";

double C = Double.parseDouble(A);

double D = Double.parseDouble(B);

System.out.println((C+D));

26

74

100.0

2674

Wrapper classes are available in ______ package.

java.io

java.util

java.lang

java.awt

Define a class to declare an integer array of size n and accept the elements into the array. Search for an element input by the user using the linear search technique, display the element if it is found, otherwise display the message “NO SUCH ELEMENT".

Define a class to declare a character array of size ten, accept the character into the array and perform the following:

• Count the number of uppercase letters in the array and print.
• Count the number of vowels in the array and print.

Define a class to declare an array of size 20 of the double datatype, accept the elements into the array and perform the following:

• Calculate and print the sum of all the elements.
• Calculate and print the highest value of the array.

Define a class to accept two strings, convert them into uppercase, check and display whether two strings are equal or not, if the two strings are not equal, print the string with the highest length or print the message both the strings are of equal length.

Define a class to accept a string, convert it into lowercase and check whether the string is a palindrome or not.

A palindrome is a word that reads the same backward as forward.

Example:

madam, racecar etc.

Define a class to accept and store 10 strings into the array and print the strings with an even number of characters.