Domande di colloquio per Java Developer presso SecureView

Do you know the hash code and equals method

What are the 4 pillars of Java and explain all of them

What is method overridding and method overloading?

Why use method overloading? What is its purpose? Why not just write the methods with different names all together? Why use method overidding? What is its purpose? Why not just write the methods with different names all together?

Explain Access Specifiers

What is static method and static variable?

What will happen if one of the overidding function is defined as static?

What is Set?

What is the difference between Linked List and ArrayList?

What is the structure of a LinkedList and Doubly LinkedList?

How are the elements stored in a LinkedList internally?

How does the structure in the collection framework understand which type of object is added, if the object type is not specified?

How to define an array in java?

What is the difference between interpreter and compiler?

What is the difference between Interface and Abstract Class?

How to write an interface and an abstract class?

Why use and Abstract class or Interface?

What is a class?

Give a method of java.lang.Object Class?

Why use static variable? Give a scenario where it is helpful?

Write a method to return an array of numbers between -50 to 50.