Java Programming - Set 1

What is the purpose of the Scanner class?

• To read input from the console

• To perform console output

• To declare variables

• To compute area

What is the syntax for declaring a constant in Java?

• final datatype CONSTANTNAME = value;

• datatype variableName;

• Scanner input = new Scanner(System.in);

• Math.pow(a, b)

Which of the following is a valid identifier in Java?

• 2A

• readDouble

• MAX_VALUE

• 4#R

What is the result of 5 / 2 in Java?

• 2

• 2.5

• 2.0

• 2.25

What is the range of the byte data type in Java?

• -128 to 127

• -32768 to 32767

• -2147483648 to 2147483647

• -9223372036854775808 to 9223372036854775807

What is the remainder when 20 is divided by 3?

• 0

• 1

• 2

• 3

What is the result of Math.pow(2, 3)?

• 2

• 3

• 8

• 6

What is the data type for a floating-point number with double precision in Java?

• byte

• short

• int

• double

What is the syntax for reading a double value from the keyboard using the Scanner class?

• input.nextDouble();

• input.nextInt();

• input.nextFloat();

• input.nextLong();

What is the result of 7 % 3?

• 0

• 1

• 2

• 3