Java Quiz for Beginners - Get Learn Tech

Welcome to your Java Quiz for Beginners

Name

What is the output of the following code snippet?

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

None

What is the result of the following code snippet?

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

Jav

ava

Error

None

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

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

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

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

None

What is the result of the following code snippet?

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

Error

None

What is the output of the following code snippet?

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

false

Error

true

None

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

It is executed before the try block.

It is executed regardless of whether an exception occurs.

It is executed only if an exception occurs.

It is executed only if catch block executes.

None

What does the "break" statement do in Java?

Exits the loop or switch statement it is used in.

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

Terminates the entire program.

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

None

What does the "super" keyword do in Java?

It invokes the constructor of the parent class.

It refers to the subclass of the current class.

It invokes the constructor of the current class.

It refers to the superclass of the current class.

None

What is the output of the following code snippet?

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

Error

None

What is the output of the following code snippet?

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

ArrayIndexOutOfBoundException

None

What does the "extends" keyword indicate in Java?

It indicates that a variable has a fixed length.

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

It is used to extend the capabilities of a method.

It is used to extend the length of an array.

None

What is the output of the following code snippet?

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

None

Which of the following is a valid long literal?

123L

123.0

123

123.456

None

Evaluate the following Java expression

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

None

What is the output of the following code snippet?

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

None

Which of the following is NOT a valid Java identifier?

$myVar

1Var

_myVar

myVar

None

What is the output of the following code snippet?

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

None

What does the "protected" keyword indicate in Java?

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.

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

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

None

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

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

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

It terminates the entire program.

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

None

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 3

1 2 4

1 2 4 5

1 2 3 4 5

None

Which of the following is NOT a Java keyword?

final

main

static

private

None

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

None

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

35.0

ArithmeticException: / by zero

None

What does the "implements" keyword indicate in Java?

It indicates that a method returns a value.

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

It is used to implement an abstract method.

It is used to implement an interface.

None

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

It indicates the starting point of the program.

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

It specifies the package where the current class is located.

It is used to include external libraries in the project.

None

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

boolean

int

String

float

None

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

new

create

createNew

instance

None

Which of the following is true about Java arrays?

Arrays can contain elements of different data types.

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

Arrays automatically resize when elements are added or removed.

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

None

Which of the following is true about Java interfaces?

Interfaces can have constructors.

Interface data members will be private

Classes can implement multiple interfaces.

Interfaces can have instance variables.

None

What is the output of the following code snippet?

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

Hello, "Java"!

Hello, Java!

Hello

Hello, name!

None

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

It refers to the current class being used.

It refers to the current method being executed.

It refers to the superclass of the current class.

It refers to the current object instance.

None

What does the "void" keyword indicate in Java?

It indicates that a method does not return any value.

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.

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

None

What is the output of the following code snippet?

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

true

Error

false

None

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

===

None

Time's up