Flipkart SDE Intern Machine Coding Round 2024 | On-Campus

Round 1: Online Assessment

• Duration: 90 mins
• Platform: HackerRank
• Questions: 3 questions (1 Easy Math, 1 Hard Graph, 1 Hard DP). I solved 2.5 and cleared the cutoff.

Round 2: Machine Coding (Elimination)

• Duration: 120 mins
• Task: Build a Cult.fit like Gym Slot Booking System entirely in-memory.
• Requirements: Users should be able to book, cancel, and view waitlists. Gym centers can add/remove slots. Code must be executable.
• My Approach: I used Java and tried to implement the Strategy Design Pattern for the waitlist allocation logic.
• Where I went wrong: I tightly coupled my 'User' and 'Booking' classes, making it difficult to extend when the interviewer asked for a follow-up feature (handling partial refunds). I also spent way too much time over-engineering the design patterns rather than getting a working MVP (Minimum Viable Product).
• How to Answer Machine Coding: Working Code > Perfect Architecture. Always get the basic requirements running first. The interviewer wants to see executable code that passes their test cases.

Key Takeaways for Freshers

Practice LLD (Low-Level Design) strictly within a 90-minute timer. Understand SOLID principles practically, not just theoretically. If your code doesn't compile at the end of the round, it's an automatic reject.