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

Evaluate the value of n. if value of p = 5, q = 19  
int n = (q – p) > (p – q) ? (q – p) : (p – q) 

Arrange the following primitive-data types in ascending order of their size:
(i) char (ii) byte (iii) double (iv) int

What is the value of y after evaluating the expression given below?

y+= ++y + y-- + --y; when int y=8; 

What are the values of a and b after the following function is executed if the values passed are 30 and 50?

void paws(int a, int b) 
{ a = a + b; 
  b = a - b; 
  a = a - b;' 
System.out.println(a + "," + b); 
} 

State the data type and value of y after the following is executed: char x = 7; y = Character.isLetter(x); 

State the value of y after the following is executed:

char x = '7';

y = Character.isLetter(x);

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

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

Which of the following is an escape sequence character in Java?

If (a>b&&b>c) then largest number is ______.

Primitive data types are built in data types which are a part of the wrapper classes. These wrapper classes are encapsulated in the java.lang package. Non primitive datatypes like Scanner class are a part of the utility package for which an object needs to be created.

1. To which package the Character and Boolean classes belong?
2. Write the statement to access the Scanner class in the program.

The size of '\n' is ______.

Identify the operator that gets the highest precedence while evaluating the given expression:

a + b % c * d - e

Which of the following is a valid java keyword?

The output of the following code is ______.

System.out.println(Math.ceil(6.4)+Math.floor(-1-2));

The default value of a boolean variable is ______.

A student executes the following code to increase the value of a variable 'x' by 2.

He has written the following statement, which in incorrect.

x=+2;

What will be the correct statement?

1. x+=2;
2. x=2
3. x=x+2;

Consider the following program segment in which the statements are jumbled, choose the correct order of statements to swap two variables using the third variable.

void swap(int a, int b)
{       a=b;      -> (1)
        b=t;           -> (2)
        int t=0;  -> (3)
        t=a;      -> (4) 
}

Evaluate the given expression when the value of a=2 and b=3

b*=a++-++b+ ++a;
System.out.println("a="+a);
System.out.println("b="+b);

Define a class with the following specifications:

Class name: Bank

Member variables:

double p - stores the principal amount

double n - stores the time period in years

double r - stores the rate of interest

double a - stores the amount

member methods:

void accept () - input values for p and n using Scanner class methods only.

void calculate () - calculate the amount based on the following conditions:

`a = p (1+r/100)^n`

void display () - display the details in the given format.

Write the main method to create an object and call the above methods.