(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Computer Applications

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

int x = 98; char ch = (char)x; what is the value in ch?

The output of the statement "CONCENTRATION" indexOf('T') is ______.

The output of the statement "talent". compareTo("genius") is ______.

Which of the following are entry-controlled loops?

1. for
2. while
3. do..while
4. switch

Consider the above picture and choose the correct statement from the following:

Write Java expression for:

`(|a + b|)/(sqrt(a^2 + b^2))`

Give the output of the following program segment. How many times is the loop executed?

for(x=10;x>20;x++)
System.out.println(x);
System.out.println(x*2);

The following code to compare two strings is compiled, the following syntax error was displayed - incompatible types - int cannot be converted to boolean.

Identify the statement which has the error and write the correct statement. Give the output of the program segment.

void calculate()
  {
  String a="KING",b="KINGDOM";
  boolean x=a.compareTo(b);
  system.out.println(x);
  }

DTDC, a courier company, charges for the courier based on the weight of the parcel. Define a class with the following specifications:

Define a class to accept a number from user and check if it is an EvenPal number or not. (The number is said to be EvenPal number when number is palindrome number (a number is palindrome if it is equal to its reverse) and sum of its digits is an even number.)

Example: 121 - is a palindrome number

Sum of the digits - 1 + 2 + 1 = 4 which is an even number

Define a class to accept values into an integer array of order 4 x 4 and check whether it is a DIAGONAL array or not An array is DIAGONAL if the sum of the left diagonal elements equals the sum of the right diagonal elements. Print the appropriate message.

Example:

3 4 2 5   Sum of the left diagonal elements =

2 5 2 3   3 + 5 + 2 + 1 = 11

5 3 2 7   Sum of the right diagonal elements =

1 3 7 1   5 + 2 + 3 + 1 = 11

Define a class to accept the gmail id and check for its validity.

A gmail id is valid only if it has:

→ @

→ . (dot)

→ gmail

→ com

Example: [email protected] is a valid gmail id.

Consider the array given below:

char ch[]={'A','E','I','O','U'};

Write the output of the following statements:

System.out.println(ch[0]*2);;

To execute a loop 10 times, which of the following is correct?

How many times will the following loop execute? Write the output of the code:

int x=10;
while(true) {
System.out.println(x++*2);
if(x%3==0)
break;
}

Write the output of the following String methods:

String x="Galaxy",y="Games";
(a)  System.out.println(x.charAt(0)==y.charAt(0));
(b)  System.out.println(x.compareTo(y));

Write the output for the following :

String s1 = “phoenix”; String s2 =”island”;

System.out.prindn (s1.substring(0).concat (s2.substring(2)));

System.out.println(s2.toUpperCase( ));

String x[ ] = {“Artificial intelligence”, “IOT”, “Machine learning”, “Big data”};
Give the output of the following statements:

(i) System.out.prindn(x[3]);
(ii) System.out.prindn(x.length);

Write a program to input a sentence and convert it into uppercase and count and display the total number of words starting with a letter ‘A’.

Example:
Sample Input: ADVANCEMENT AND APPLICATION OF INFORMATION TECHNOLOGY ARE EVER CHANGING.
Sample Output: Total number of words starting with letter A’ = 4.