Question 1

Which keyword is used to declare a method in Java?

Accepted Answer

void

Answer

int

Answer

new

Answer

class

Question 2

What does the 'public' keyword indicate in a Java class?

Accepted Answer

It specifies that the class can be accessed from any other class.

Answer

It specifies that the class is abstract and cannot be instantiated.

Answer

It indicates that the class cannot be inherited.

Answer

It indicates that the class is a subclass of another class.

Question 3

What does the keyword 'static' mean when used in a Java method?

Accepted Answer

The method belongs to the class rather than an instance of the class.

Answer

The method can only be called within the same package.

Answer

The method cannot be overridden in a subclass.

Answer

The method can access private variables of the class.

Question 4

Which data type in Java is used to store whole numbers?

Accepted Answer

int

Answer

double

Answer

boolean

Answer

String

Question 5

What is the purpose of the 'import' keyword in Java?

Accepted Answer

It is used to include classes from other packages.

Answer

It is used to allocate memory for an object.

Answer

It is used to declare a new variable.

Answer

It is used to define a new method.

Question 6

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

Accepted Answer

false

Answer

null

Answer

0

Answer

true

Question 7

What is the purpose of the 'for' loop in Java?

Accepted Answer

To repeatedly execute a block of code based on a given condition.

Answer

To perform a one-time check and execute a block of code.

Answer

To define a new method.

Answer

To declare a new variable.

Question 8

What is the purpose of the 'break' statement in Java?

Accepted Answer

To terminate the execution of a loop or switch statement.

Answer

To continue to the next iteration of a loop.

Answer

To throw an exception.

Answer

To return a value from a method.

Question 9

What is the purpose of the 'this' keyword in Java?

Accepted Answer

To refer to the current instance of a class.

Answer

To create a new instance of a class.

Answer

To declare a variable.

Answer

To perform mathematical operations.

Question 10

Which data type would you use to store a whole number in Java?

Accepted Answer

int

Answer

double

Answer

String

Answer

boolean

Question 11

What is the correct syntax for declaring a variable in Java?

Accepted Answer

int myVariable;

Answer

int = myVariable;

Answer

variable myVariable is int;

Answer

myVariable = int;

Question 12

What is the result of 10 % 3 in Java?

Accepted Answer

1

Answer

10

Answer

0

Answer

3

Question 13

What is the purpose of a constructor in Java?

Accepted Answer

To initialize objects

Answer

To declare methods

Answer

To define class variables

Answer

To perform mathematical operations

Answer

To print output

Question 14

What does the 'public' keyword indicate in Java?

Accepted Answer

That the method or variable is accessible from other classes

Answer

That the method or variable is static and belongs to the class itself

Answer

That the method or variable is abstract and must be implemented by a subclass

Answer

That the method or variable is final and cannot be modified

Answer

That the method or variable is private and can only be accessed within its own class

Question 15

What is the purpose of the 'if' statement in Java?

Accepted Answer

To execute a block of code conditionally

Answer

To print output

Answer

To loop through a collection

Answer

To declare variables

Answer

To handle exceptions

Question 16

Which keyword is used to create an instance of a class in Java?

Accepted Answer

new

Answer

allocate

Answer

instance

Answer

create

Answer

object

Question 17

What is a method in Java?

Accepted Answer

A block of code that performs a specific task.

Answer

A reserved keyword in Java.

Answer

A loop structure in Java.

Answer

A data type in Java.

Question 18

What is the purpose of a return type in a method declaration in Java?

Accepted Answer

To specify the type of value that the method returns.

Answer

To specify the name of the method.

Answer

To specify the access modifier of the method.

Answer

To specify the parameters of the method.

Question 19

What is the syntax to call a method in Java?

Accepted Answer

methodName();

Answer

methodName;

Answer

methodName{}

Answer

methodName[];

Question 20

Which of the following statements about java class is correct?

Accepted Answer

A class is a blueprint for creating objects (a particular data structure), providing initial values for state (member variables or attributes), and implementations of behavior (member functions or methods).

Answer

A class is a built-in data type in Java

Answer

A class is a special type of method in Java

Answer

A class is a variable that holds the data

Question 21

Which of the following is true about Java constructors?

Accepted Answer

option D: Constructors have the same name as the class in which they are declared.

Answer

option A: Constructors can be inherited from a superclass.

Answer

option B: Constructors can be overridden in a subclass.

Answer

option C: Constructors are used to define class methods.

Question 22

Which keyword is used to prevent a variable from being modified after initialization in Java?

Accepted Answer

option C: final

Answer

option B: volatile

Answer

option D: transient

Answer

option A: static

Question 23

Which of the following is true about Java inheritance?

Accepted Answer

option D: A subclass inherits all the non-private members (methods and fields) of its superclass.

Answer

option B: A superclass can inherit members from its subclasses.

Answer

option C: Inheritance allows for multiple inheritance in Java.

Answer

option A: A subclass can only inherit private members of its superclass.

Question 24

What is the purpose of curly braces in Java?

Accepted Answer

To define code blocks

Answer

To format text strings

Answer

To perform mathematical operations

Answer

To declare variables

Answer

To import external libraries

Question 25

Which statement is true about the use of curly braces in Java?

Accepted Answer

Curly braces must always be used with if-else statements and loops

Answer

Curly braces are required for all expressions

Answer

Curly braces are only used for method declarations

Answer

Curly braces are used for defining variables in Java

Answer

Curly braces are optional and can be omitted in all situations

Question 26

What is the purpose of System.out in Java?

Accepted Answer

To print output to the standard output stream

Answer

To read user input from the console

Answer

To perform mathematical calculations

Answer

To handle exception errors

Question 27

What method is used to print a new line in Java using System.out?

Accepted Answer

println

Answer

print

Answer

newLine

Answer

nextLine

Question 28

Which method is used to print a string without adding a newline character in Java using System.out?

Accepted Answer

print

Answer

println

Answer

display

Answer

write

Question 29

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

Accepted Answer

Object

Answer

boolean

Answer

int

Answer

double

Question 30

Which primitive type in Java is used to store large whole numbers?

Accepted Answer

long

Answer

char

Answer

boolean

Answer

double

Question 31

Which primitive data type in Java is used to store single characters?

Accepted Answer

char

Answer

boolean

Answer

String

Answer

int

Question 32

What is a double in Java?

Accepted Answer

A data type that represents floating-point numbers with more precision than the float data type.

Answer

A looping statement in Java.

Answer

A control flow statement in Java that allows for branching based on a condition.

Answer

A data structure in Java that stores key-value pairs.

Question 33

What is the result of adding a double and an int in Java?

Accepted Answer

A double

Answer

An int

Answer

A String

Answer

A boolean

Question 34

How do you declare a double variable in Java?

Accepted Answer

double myVariable;

Answer

variable double myVariable;

Answer

declare myVariable as double;

Answer

double = myVariable;

Answer

myVariable = double;

Question 35

What happens when you attempt to divide a non-zero number by zero in Java?

Accepted Answer

ArithmeticException

Answer

NaN

Answer

Infinity

Answer

0

Question 36

What is the purpose of compound assignment operators in Java?

Accepted Answer

To perform an operation and assign the result to the same variable in a single statement.

Answer

To perform logical operations in Java.

Answer

To compare two values for equality in Java.

Answer

To increment or decrement a variable in Java.

Question 37

What is the purpose of the increment operator in Java?

Accepted Answer

To increase the value of a variable by 1.

Answer

To assign a new value to a variable.

Answer

To multiply the value of a variable by 2.

Answer

To decrease the value of a variable by 1.

Question 38

What is the purpose of the decrement operator in Java?

Accepted Answer

To subtract 1 from a variable.

Answer

To divide a variable by -1.

Answer

To add 1 to a variable.

Answer

To multiply a variable by -1.

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