Java Quiz for Beginners - Get Learn Tech

Welcome to your Java Quiz for Beginners

Name

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

createNew

new

create

instance

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

It is used to include external libraries in the project.

It is used to import classes from the java.util package.

It specifies the package where the current class is located.

It indicates the starting point of the program.

What does the "this" keyword refer to in Java?

It refers to the current method being executed.

It refers to the current class being used.

It refers to the superclass of the current class.

It refers to the current object instance.

What is the output of the following code snippet?

int x = 10;
int y = 5;
System.out.println(x 5);

false

Error

true

Which operator is used for comparing two numbers for equality in Java?

===

What is the output of the following code snippet?

int x = 10;
System.out.println(x++);

What is the purpose of the "continue" statement in Java?

It skips the current iteration of a loop and continues with the next iteration.

It terminates the entire program.

It exits the loop or switch statement it is used in.

It throws an exception to be caught by a try-catch block.

Which of the following is a valid long literal?

123.456

123.0

123L

123

What does the "void" keyword indicate in Java?

It signifies that a variable or method cannot be changed after it is initialized.

It indicates that a method does not return any value.

It indicates that a variable does not have a specific value.

It specifies that a variable or method can only be accessed within its own class.

What is the purpose of the "finally" block in a try-catch-finally statement in Java?

It is executed only if catch block executes.

It is executed before the try block.

It is executed only if an exception occurs.

It is executed regardless of whether an exception occurs.

What is the result of the following code snippet?

int x = 10;
x += 5;
System.out.println(x);

Error

What is the output of the following code snippet?

String str = "Hello";
System.out.println(str.length());

What is the output of the following code snippet?

int x = 5;
int y = 3;
System.out.println(x % y);

Error

What does the "super" keyword do in Java?

It invokes the constructor of the parent class.

It invokes the constructor of the current class.

It refers to the superclass of the current class.

It refers to the subclass of the current class.

What does the "protected" keyword indicate in Java?

It makes a variable or method belong to the class, not the object.

It indicates that a variable or method can only be accessed within its own package or by subclasses.

It specifies that a variable or method can only be accessed within its own class

It signifies that a variable or method cannot be changed after it is initialized.

Which of the following is NOT a valid Java identifier?

myVar

1Var

_myVar

$myVar

Evaluate the following Java expression

int x=3, y=5, z=10;
System.out.println(++z + y - y + z + x++)

What does the "break" statement do in Java?

Terminates the entire program.

Skips the current iteration of a loop and continues with the next iteration.

Exits the loop or switch statement it is used in.

Throws an exception to be caught by a try-catch block.

What does the "public" access modifier indicate in Java?

It makes a variable or method belong to the class, not the object.

It signifies that a variable or method cannot be changed after it is initialized

It indicates that a variable or method can be accessed from any other class.

It specifies that a variable or method can only be accessed within its own class

Which of the following is true about Java arrays?

Arrays automatically resize when elements are added or removed.

The elements of an array must be of the same data type.

The length of an array can be changed after it is initialized.

Arrays can contain elements of different data types.

What is the output of the following code snippet?

int[] numbers = {1, 2, 3, 4, 5};
System.out.println(numbers[3]);

What is the output of the following code snippet?

String name = "Java"; System.out.println("Hello, " + name + "!");

Hello, Java!

Hello

Hello, name!

Hello, "Java"!

What is the output of the following code snippet?

System.out.println(10 != 5);

false

true

Error

Which of the following is NOT a primitive data type in Java?

int

String

float

boolean

What is the output of the following code snippet?

String str = "Java";
System.out.println(str.charAt(2));

What is the output of the following code snippet?

int[] arr = {1, 2, 3, 4, 5};
for (int i : arr) {
if (i == 3) {
continue;
}
System.out.print(i + " ");
}

1 2 4

1 2 3 4 5

1 2 4 5

1 2 3

What is the result of the following code snippet?

String str = "Java";
System.out.println(str.substring(1, 3));

Jav

ava

Error

What is the output of the following code snippet?

String str = "Java";
System.out.println(str.indexOf('a'));

ArrayIndexOutOfBoundException

What does the "implements" keyword indicate in Java?

It is used to implement an abstract method.

It indicates that a method returns a value.

It is used to implement an interface.

It specifies that a class is a subclass of another class.

What does the "extends" keyword indicate in Java?

It specifies that a class is a subclass of another class.

It is used to extend the length of an array.

It is used to extend the capabilities of a method.

It indicates that a variable has a fixed length.

What does the expression float a = 35 / 0 return?

35.0

ArithmeticException: / by zero

What is the output of the following code snippet?

int x = 5;
int y = 2;
System.out.println(x / y);

1.0

2.0

2.5

Which of the following is NOT a Java keyword?

static

final

private

main

Which of the following is true about Java interfaces?

Interface data members will be private

Interfaces can have constructors.

Interfaces can have instance variables.

Classes can implement multiple interfaces.

Time's up