Written Exam Question set for a Java & React JS Fullstack Senior Software Engineer role

Here’s a comprehensive written exam question set for a Java & React JS Fullstack Senior Software Engineer role. The exam is divided into four sections: Java, React JS, Fullstack, and General. Each section includes both multiple-choice and short-answer questions.

Java Section

Multiple Choice Questions:

1. What are the main principles of Object-Oriented Programming (OOP)?

   1. Encapsulation, Polymorphism, Abstraction, Inheritance

   2. Encapsulation, Modularity, Abstraction, Concurrency

   3. Encapsulation, Polymorphism, Composition, Inheritance

2. Which method in Java is used to compare the values of two objects?

   1. ==

   2. equals()

   3. compareTo()

3. What is the output of the following code snippet?