Juspay

Role: SDE

College: Not Specified

Interview Date: August 2024

Interview Type: Off-Campus (Traveled to Bangalore office)

Result: Rejected

Difficulty: Hard

Rounds: 4 rounds

Topics Asked: Graph Problems, "Tree of Space", Thread Safety, Locking Mechanisms, Mutex/Semaphore, Rollback Algorithms, General Problem Solving (non-CS related)

Experience:

This candidate, with 1 year of working experience, shared their interview process for an SDE role.

Round 1: Coding Round (90 minutes)
Three graph problems were given. The candidate managed to solve 2.5 of them and advanced.

Round 2 (Part A): Coding Round (90 minutes)
This round involved solving one graph-based problem.

Round 3 (Part B): Hackathon (All-day process)
The candidate worked on the same "Tree of Space" problem, deriving its time and space complexity. They were then asked to make only the locking mechanism in the code thread-safe, without using mutex/semaphore initially. After analyzing inconsistencies, a solution was implemented focusing on a rollback algorithm.

Round 4: Technical/Problem Solving Round (On-site in Bangalore)
Candidates were asked to come to the Bangalore office. They were given a problem: "You are given a coil, magnets, shaft, wheel, and battery. How would you create a motor?" The problem statement had nothing to do with engineering or computer science. After a lunch break, one-on-one interviews started late. The candidate waited until 8 PM but was not called for an interview, and was eventually told the process was over. The overall experience was described as disorganized and a waste of time, leading to rejection.