Question 1

Which of the following is not a Java primitive data type?

Accepted Answer

String

Answer

boolean

Answer

double

Answer

int

Question 2

What is the default value of an uninitialized boolean variable in Java?

Accepted Answer

false

Answer

true

Answer

null

Answer

0

Question 3

Which Java data type is used to store whole numbers?

Accepted Answer

int

Answer

String

Answer

double

Answer

char

Question 4

In Java, which data type is used to store single characters?

Accepted Answer

char

Answer

int

Answer

boolean

Answer

String

Question 5

What is the maximum value that can be stored in a variable of type 'short' in Java?

Accepted Answer

32767

Answer

65535

Answer

2147483647

Answer

-32768

Question 6

Which keyword is used to declare a constant variable in Java?

Accepted Answer

final

Answer

int

Answer

public

Answer

static

Question 7

What is the purpose of the 'void' keyword in Java when used with a method?

Accepted Answer

It indicates that the method does not return a value.

Answer

It is used to define a variable with no value assigned.

Answer

It signifies a method that can accept any data type as input.

Answer

It specifies a method that returns an integer.

Question 8

Which Java data type is used to store true/false values?

Accepted Answer

boolean

Answer

double

Answer

int

Answer

char

Question 9

What is the purpose of the 'final' keyword when used in Java variable declarations?

Accepted Answer

It indicates that the value of the variable cannot be changed once initialized.

Answer

It allows the variable to be accessed from any class within the same package.

Answer

It specifies that the variable can only be accessed by methods within the same class.

Answer

It ensures that the variable has a default initial value of 0.

Question 10

What is the difference between '== 'and '.equals()' when comparing two String objects in Java?

Accepted Answer

'==' compares the references of the objects, while '.equals()' compares the actual contents of the objects.

Answer

'==' compares the contents of the objects, while '.equals()' compares the references of the objects.

Answer

'==' checks for null values, while '.equals()' does not.

Answer

'==' is used for comparing integers, while '.equals()' is used for comparing strings.

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