practice

Which of the following is not a valid comment in Java? Options: a. /** comment */ b. /* comment */ c. /* comment / d. // comment

• /* comment *

• # comment

• // comment //

• c. /* comment /

What is the output of the following code? (Code snippet provided) Options: a. NPTEL2024\n44java b. NPTEL44\n44java c. NPTEL2024\n2024java d. NPTEL44\n2024java

• NPTEL2024 44java

• c. NPTEL2024\n2024java

• NPTEL44 44java

• NPTEL2024 44java

Which of the following is used to find and fix bugs in the Java programs? Options: a. JVM b. JRE c. JDK d. JDB

• a. JDK

• b. JRE

• c. JVM

• d. JDB

What is the value returned by the method f() defined below? (Method provided) Options: a. The sum of x and y, that is, x + y. b. The difference of x and y, that is, x - y. c. The maximum of x and y, that is, the larger value of x and y. d. The minimum of x and y, that is, the smaller value of x and y.

• The absolute difference of x and y, that is, |x - y|.

• c. The maximum of x and y, that is, the larger value of x and y.

• The average of x and y, that is, (x + y) / 2.

• The product of x and y, that is, x * y.

Consider the following program. What will be the output if it is executed? (Code snippet provided) Options: a. Print fi

• Print f

• Print if

• Print fi

• Print fi and more

What is the purpose of the 'static' keyword in Java? Options: a. To define a constant b. To create a class method c. To create an instance variable d. To define an interface

• To define a method variable

• To implement an abstract class

• b. To create a class method

• To create a subclass

Which of the following is a valid way to declare an array in Java? Options: a. int[] arr; b. int arr[]; c. Both a and b d. None of the above

• c. Both a and b

• int arr = new int[5];

• array int[] arr;

• int[] = arr;

What is the default value of a boolean variable in Java? Options: a. true b. false c. 0 d. null

• d. true

• b. false

• c. 1

• a. undefined

Which of the following is not a primitive data type in Java? Options: a. int b. float c. String d. char

• byte

• double

• String

• boolean

What is the output of the following code snippet? (Code snippet provided) Options: a. 10 b. 20 c. 30 d. Compilation error

• a. 10

• c. 30

• d. Runtime error

• b. 20