Rocketlane Backend Java Developer Interview Questions and Answers

Q1. Basic questions on Java - Collections, Object Class
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Q2. Basic questions on REST - Various HTTP methods, Difference between PUT and PATCH
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Q3. Give deets about the project mentioned on the resume
Ans. 
The project mentioned on the resume is a web application for managing inventory and sales.
• Developed using Java and Spring framework

• Implemented RESTful APIs for CRUD operations

• Integrated with a relational database for data storage

• Implemented authentication and authorization using Spring Security

• Used front-end technologies like HTML, CSS, and JavaScript for the user interface
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Q4. Why do you want to switch
Ans. 
I want to switch because I am looking for new challenges and opportunities to grow as a backend Java developer.
• Seeking new challenges and opportunities

• Wanting to expand my skills and knowledge as a backend Java developer

• Looking for a company with a strong backend development team

• Desire to work on larger and more complex projects

• Wanting to contribute to the development of innovative solutions
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Platform - HR
Question - Sort array based on frequency and then value

REST - Various HTTP methods, Idempotency
Java - Threading, Diamond Problem
OOP - Abstract class vs Interface - when to use what and why

What is a cache and why do we use it

What happens when you enter a URL in the browser