Are you just starting out with Java programming? Our Java Basic Quiz is designed to help you test your understanding of fundamental concepts like variables, data types, loops, and classes. Ideal for beginners, this quiz is a great way to practice basic coding skills and build a strong foundation in Java.

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Test your basic Java knowledge
Learn by practicing beginner-level questions
Build a strong foundation for object-oriented programming

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Java (Basic)

Take our Java Basic Quiz to test your foundational Java knowledge. Perfect for beginners learning about variables, loops, and classes. Start now!

Max Time : 10 Min.

The number of attempts remaining is 5

Think about implementing functionality

1 / 15

Which keyword is used to inherit interfaces in Java?

1) implements

2) inherits

3) abstract

4) extends

Think about initialization

2 / 15

Which method is called automatically when an object is created?

1) main()

2) static

3) constructor

4) final

One option is just a regular word

3 / 15

Which of the following is not a reserved keyword in Java?

1) const

2) volatile

3) static

4) goto

Think about collections and arrays

4 / 15

Which loop is known as an enhanced for loop?

1) for-each

2) while

3) for

4) do-while

Think about order of operations

5 / 15

What is the output of System.out.println(10 + 20 + "Java")?

1) 1020Java

2) Java30

3) 30Java

4) Java1020

Think about fixed sizes in Java

6 / 15

What is the size of an int data type in Java?

1) 16 bytes

2) 8 bytes

3) 2 bytes

4) 4 bytes

Think about arithmetic errors

7 / 15

Which exception is thrown when dividing by zero?

1) ClassCastException

2) IOException

3) ArithmeticException

4) NullPointerException

Think about floating-point numbers

8 / 15

Which data type is used for decimal values in Java?

1) double

2) char

3) boolean

4) int

Think about bounds checking

9 / 15

Which exception is thrown when an array is accessed with an illegal index?

1) ArrayIndexOutOfBoundsException

2) NullPointerException

3) ArithmeticException

4) ClassCastException

Think about commonly used classes

10 / 15

Which package is imported by default in every Java program?

1) java.util

2) java.io

3) java.lang

4) java.net

Think about threading basics

11 / 15

Which method is used to start a thread execution?

1) init()

2) run()

3) start()

4) execute()

Think about encapsulation

12 / 15

Which access modifier is the most restrictive?

1) private

2) public

3) default

4) protected

Think about measuring size

13 / 15

Which method is used to find the length of a string?

1) length()

2) measure()

3) size()

4) count()

Think about the starting point

14 / 15

Which method is the entry point of a Java program?

1) init()

2) main()

3) constructor()

4) start()

Think about how to access instance variables

15 / 15

Which keyword is used to refer to the current object in Java?

1) self

2) object

3) this

4) super

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Java Quiz (Basic)

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