On-campus interview, then on-site.

The on-campus interview consisted of very little coding and mainly OOP concepts. The on-site portion included some coding (HackerRank) and then more OOP/behavioral questions.

I don't quite remember the details, as it was honestly a long time ago.

Basic OOP/Java Questions

This section covers fundamental Object-Oriented Programming (OOP) and Java concepts.

Core OOP Concepts:

• Encapsulation: Bundling data (attributes) and methods (behaviors) that operate on the data within a single unit, called a class.
• Abstraction: Hiding complex implementation details and showing only essential features of an object.
• Inheritance: Allowing a new class to acquire properties and behaviors from an existing class.
• Polymorphism: The ability of an object to take on many forms, meaning it can be accessed through a base class reference.

Java Specifics:

• What is a class?
• What is an object?
• Difference between a class and an object.
• What is a constructor?
• Explain the public, private, and protected access modifiers.
• What is method overloading?
• What is method overriding?
• Explain the static keyword.
• What is the final keyword used for?
• What are interfaces and abstract classes? What is the difference between them?
• Explain Java's garbage collection.
• What is the difference between == and .equals()?
• What is an exception and how do you handle it?
• Explain the try-catch-finally block.
• What are the different types of exceptions in Java?
• What is a String in Java? Is it mutable or immutable?
• Explain the concept of a package.
• What is the super keyword?