(English Medium) ICSE Class 10 - CISCE Important Questions for Computer Applications

"Java compiled code (byte code) can run on all operating systems" - Name the feature.

Assertion (A): Integer class can be used in the program without calling a package.

Reason (R): It belongs to the default package java lang.

Write a Java expression for the following : |x²+2xy| 

Write a program to input a number and check and print whether it is a Pronic number or not. (Pronic number is the number which is the product of two consecutive integers).

Examples: 12 = 3 × 4 
20 = 4 × 5
42 = 6 × 7

Write a program to input twenty names in an array. Arrange these names in descending order of alphabets, using the bubble sort technique. 

Using the switch statement, write a menu driven program to calculate the maturity amount of a Bank Deposit.
The user is given the following options :
(i) Term Deposit
(ii) Recurring Deposit

For option (i) accept principal (P), rate of interest(r) and time period m years(n). Calculate and output the maturity amount (A) receivable using the formula

`"A" = "P"[1+"r"/100]^"n"`

For option (ii) accept Monthly Installment (P), rate of interest (r) and time period in months (n). Calculate and output the maturity amount (A) receivable using the formula

`"A" = "P" xx "n" + "P" xx ("n"("n" + 1))/2 xx "r"/100 xx 1/12`

For an incorrect option, an appropriate error message should be displayed.

Write a program to accept the year of graduation from school as an integer value from, the user. Using the Binary Search technique on the sorted array of integers given below. 

Output the message “Record exists” If the value input is located in the array. If not, output the message “Record does not exist”.
{1982, 1987, 1993, 1996. 1999, 2003, 2006, 2007, 2009, 2010}.  

The Scanner class method used to accept words with space:

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

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.

Name the keyword which: indicates that a method has no return type.

Name the keyword which: makes the variable as a class variable.

Evaluate the following expression if the value of x = 2,y = 3 and z = 1.
v = x + – z + y + + + y.

Identify the literal given below:

0.5

What are the values stored in variables r₁ and r₂:

(i) double r₁=Math.abs(Math.min(-2.83,-5.83));
(ii) double r₂=Math.sqrt(Math.floor(16.3)); 

Name any two library packages.

What is the difference between the Scanner class functions next () and nextLine()?