Java Programming MCQ - VIDYA VICHAR

Welcome to your Java Programming MCQ

What is the purpose of static keyword in Java?

Declares a constant

None of the above

Allocates memory statically

Makes a variable or method belong to the class itself

None

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

int arr[];

int arr[3];

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

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

None

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

Declares a method

Reads input from the user

Prints output to the console

None of the above

None

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

To indicate the number of arguments the method takes

To specify the return type of the method

None of the above

To indicate that the method does not return anything

None

How do you declare a generic class in Java?

typedef class MyClass { ... }

generic class MyClass { ... }

class MyClass { ... }

define class MyClass { ... }

None

What is the purpose of import statement in Java?

Declares a class

Imports a package

None of the above

Allocates memory

None

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

int arr[][3];

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

int arr[][][];

int arr[][];

None

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

methodName(void) { ... }

methodName() { ... }

void methodName() { ... }

method void methodName() { ... }

None

How do you catch an exception in Java?

except (Exception e) { ... }

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

catch (Exception e) { ... }

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

None

10.

How do you declare an interface in Java?

interface MyInterface { ... }

define interface MyInterface { ... }

typedef interface { ... } MyInterface;

class MyInterface { ... }

None

11.

What is the purpose of this keyword in Java?

Refers to a static method

Refers to the superclass of a class

Refers to the current instance of a class

None of the above

None

12.

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

None of the above

None

13.

How do you define a class in Java?

class MyClass { ... };

define class MyClass { ... };

typedef class { ... } MyClass;

class { ... } MyClass;

None

14.

What is the purpose of public access modifier in Java?

None of the above

Allows access from anywhere

Restricts access to subclasses

Restricts access to the current package

None

15.

How do you declare a static method in Java?

void method() static { ... }

void static method() { ... }

method static void() { ... }

static void method() { ... }

None

16.

How do you declare a constructor in Java?

void MyClass() { ... }

new MyClass() { ... }

constructor MyClass() { ... }

MyClass() { ... }

None

17.

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

int const x = 10;

final int x = 10;

int final x = 10;

constant int x = 10;

None

18.

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

Exits the switch statement

Continues to the next case

None of the above

Exits the loop

None

19.

How do you declare an integer variable in Java?

int var;

integer var;

variable var;

var int;

None

20.

How do you declare an abstract method in Java?

void abstract method();

void method();

method() abstract;

abstract void method();

None

21.

How do you dynamically allocate memory in Java?

new size;

Java handles memory allocation automatically

allocate(size);

malloc(size);

None

22.

What is the purpose of the super keyword in Java?

Calls a superclass method

None of the above

Declares a superclass

Refers to the superclass of the current object

None

23.

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

func(array);

func(array[]);

func(&array);

func(*array);

None

24.

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

arr(3);

arr[2];

arr.3;

arr(2);

None

25.

What does the equals() method do in Java?

Copies one string to another

Compares two objects for equality

Concatenates two strings

None of the above

None

26.

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

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

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

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

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

None

27.

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

Declares a method

Handles exceptions

Defines a new class

None of the above

None

28.

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

None of the above

None

29.

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

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

for i = 0 to 4 { ... }

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

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

None

30.

How do you define a constant in Java?

final int CONSTANT = 10;

define CONSTANT 10

int CONSTANT = 10;

constant CONSTANT = 10

None

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