Role - Java Backend Developer
Experience - 3 years 10 months
Location - Gurugram

Round 1 - DSA Round
Project discussion and follow up questions. 2 DSA questions were asked

• https://leetcode.com/problems/populating-next-right-pointers-in-each-node/
• https://leetcode.com/problems/intersection-of-two-linked-lists/
  Verdict - Strong Positive

Round 2 - LLD Round
LLD of Delivery System of any app like Zepto/ Blinkit/ Nykaa (only from the perspective of the driver, not user).

• List down the functional and non-functional requirements.
• Use chat gpt to write the basic running code. Now write running code for the requirements you listed.
• Add some extra features like estimated time calculation, real time tracking details etc.
  Verdict - Strong Positive

Round 3 - LLD Round
LLD of McDonalds having multiple outlets.

• List down the microservices, entities, database schema, program flow and basic APIs.
• Tell how will have you handle concurrent orders by multiple users to preserve the consistency of the stock of ingredients at a particular store.
• Various follow-up questions were asked, like writing database queries to fetch details of orders/ stock/ payments etc. or how to auto-scale your design.
  Verdict - Strong Positive

Round 4 - Managerial Round

• Project discussion and follow up questions
• Discuss some challenges which you faced during current projects and how did you solve them. How will you further improve the design of your current project
• What is singleton class, write sample code for it along with the driver class.
• How to make a singleton class thread-safe?
• What is static keyword?
  Verdict - Positive (but with few negative points, as I made few mistakes in writing the code for singleton class)

Overall - Selected. Offer - 75 % hike over current base salary.