Role - Senior Software Engineer (Backend)
Location - Noida
Experience - 3 years 8 months

OA Round

• Theoretical questions on Java and algorithms.
• Coding questions - Find the maximum even subsequence in an array, find the cost to make two strings equal - where cost is the difference in ASCII values of 2 characters at the same index in the 2 strings

Round 1 -

1. In-depth project discussion, follow-up questions, tell the high level design of your project
2. Tell about design patterns which you have used
3. What is rate limiter and where is it placed in HLD?
4. Coding question - https://leetcode.com/problems/rotting-oranges/
   Verdict - Positive

Round 2 -

1. In-depth discussion of my project, follow-up questions, tell about the impact that your projects brought
2. Which database did you use in your projects and why?
3. LLD - Wiki Management System of Atlassian - Requirements specification, database schema design and various follow-up questions
4. What is partition tolerance and how is it achieved - explain the difference between availability and partition tolerance with a real world example
   Verdict - Negative as I couldn't explain the last question well

Round 3 -

1. In-depth project discussion, follow-up questions
2. Why did you use MySQL in your project?
3. What are load balancers, auto-scaling, which health monitoring tools do you know?
4. Tell about caching and cache eviction algorithms
5. Write complete working code of LRU Cache design in O(1) time, how will you make it thread safe?
   Verdict - Positive

Overall - Selected. Offer - 45 % hike over current base salary.