Java Programming MCQ - VIDYA VICHAR

Welcome to your Java Programming MCQ

What does the equals() method do in Java?

Compares two objects for equality

Copies one string to another

None of the above

Concatenates two strings

None

What is the purpose of void in method declarations in Java?

To specify the return type of the method

To indicate the number of arguments the method takes

None of the above

To indicate that the method does not return anything

None

How do you declare a method that does not return any value in Java?

methodName() { ... }

method void methodName() { ... }

void methodName() { ... }

methodName(void) { ... }

None

What is the purpose of the System.out.println() method in Java?

Declares a method

Prints output to the console

Reads input from the user

None of the above

None

How do you declare a variable that cannot be modified in Java?

final int x = 10;

int const x = 10;

constant int x = 10;

int final x = 10;

None

How do you write a for loop in Java that iterates 5 times?

for (i = 0; i < 5; i++) { ... }

for (int i = 0; i < 5; i++) { ... }

for (i = 1; i <= 5; i++) { ... }

for i = 0 to 4 { ... }

None

How do you declare an interface in Java?

interface MyInterface { ... }

define interface MyInterface { ... }

typedef interface { ... } MyInterface;

class MyInterface { ... }

None

How do you declare a multi-dimensional array in Java?

int arr[][][];

int arr[][] = {...};

int arr[][3];

int arr[][];

None

How do you declare a generic class in Java?

typedef class MyClass { ... }

generic class MyClass { ... }

define class MyClass { ... }

class MyClass { ... }

None

10.

What is the purpose of import statement in Java?

None of the above

Declares a class

Imports a package

Allocates memory

None

11.

How do you declare an integer variable in Java?

int var;

var int;

integer var;

variable var;

None

12.

What is the purpose of static keyword in Java?

None of the above

Declares a constant

Allocates memory statically

Makes a variable or method belong to the class itself

None

13.

How do you pass an array to a method in Java?

func(*array);

func(array[]);

func(&array);

func(array);

None

14.

How do you declare a static method in Java?

void static method() { ... }

method static void() { ... }

void method() static { ... }

static void method() { ... }

None

15.

What is the correct way to initialize an array in Java?

int arr[3];

arr[] = {1, 2, 3};

int arr[];

int arr[3] = {1, 2, 3};

None

16.

How do you define a class in Java?

typedef class { ... } MyClass;

class MyClass { ... };

define class MyClass { ... };

class { ... } MyClass;

None

17.

How do you define a constant in Java?

define CONSTANT 10

int CONSTANT = 10;

constant CONSTANT = 10

final int CONSTANT = 10;

None

18.

How do you declare a constructor in Java?

void MyClass() { ... }

constructor MyClass() { ... }

MyClass() { ... }

new MyClass() { ... }

None

19.

How do you access the third element of an array arr in Java?

arr(2);

arr[2];

arr.3;

arr(3);

None

20.

How do you dynamically allocate memory in Java?

malloc(size);

new size;

Java handles memory allocation automatically

allocate(size);

None

21.

What is the purpose of try-catch block in Java?

Declares a method

Handles exceptions

Defines a new class

None of the above

None

22.

How do you open a file named data.txt for writing in Java?

FileWriter file = new FileWriter("data.txt");

open("data.txt", "w");

fopen("data.txt", "w");

file.open("data.txt", "write");

None

23.

What does the break statement do in a switch statement in Java?

Exits the loop

Continues to the next case

Exits the switch statement

None of the above

None

24.

What is the purpose of public access modifier in Java?

Restricts access to the current package

None of the above

Restricts access to subclasses

Allows access from anywhere

None

25.

What is the output of System.out.println(10 % 3); in Java?

None of the above

None

26.

How do you declare an abstract method in Java?

void abstract method();

void method();

method() abstract;

abstract void method();

None

27.

What is the output of System.out.println("Hello".charAt(1)); in Java?

None of the above

None

28.

How do you catch an exception in Java?

try { ... } catch (Exception e) { ... }

except (Exception e) { ... }

try { ... } except (Exception e) { ... }

catch (Exception e) { ... }

None

29.

What is the purpose of this keyword in Java?

Refers to the current instance of a class

Refers to the superclass of a class

Refers to a static method

None of the above

None

30.

What is the purpose of the super keyword in Java?

Refers to the superclass of the current object

Declares a superclass

Calls a superclass method

None of the above

None

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