Java Online Quiz For Experts

Test your coding prowess in our Ultimate Programming Java Online Quiz for Experts with Total 7 Questions.

Whether you're a seasoned developer or just dipping your toes into the programming world, challenge yourself with a range of questions spanning languages like Python, Java, and more.

Are you ready to conquer the coding conundrums? Put on your thinking hat and dive into the quiz now!

Name

Which interface does java.util.Hashtable implement?

A.) Java.util.Map

B.) Java.util.List

C.) Java.util.HashTable

D.) Java.util.Collection

None

What allows the programmer to destroy an object x?

A.) x.delete()

B.) x.finalize()

C.) Runtime.getRuntime().gc()

D.) Only the garbage collection system can destroy an object.

None

Which of the below is a valid way to instantiate an array in java?

A.) int myArray [] = {1, 3, 5};

B.) int myArray [] [] = {1,2,3,4};

C.) int [] myArray = (5, 4, 3);

D.) int [] myArray = {“1”, “2”, “3”};

None

You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in the natural order. Which interface provides that capability?

A.) java.util.Map

B.) java.util.Set

C.) java.util.List

D.) java.util.Collection

None

Which two are valid constructors for Thread?

A.) Thread(Runnable r, String name)

B.) Thread()

C.) Thread(int priority)

D.) Thread(Runnable r, ThreadGroup g)

E.) Thread(Runnable r, int priority)

Can we have two main methods in a java class?