Zepto Software Development Engineer 3 Interview Questions, Process, and Tips

Interview preparation tips for other job seekers - Round 1 - Technical: The first round involved solving one tree-based question and one array-based question. I was also asked about object-oriented programming concepts, Git commands, and SQL queries. In addition, I faced questions based on my resume projects, and I was asked to explain the difference between a primary key and a unique key.

Round 2 - Technical: The second round focused more on system design and APIs. I was asked to explain the difference between PUT and POST in REST APIs, design the database schema of one of my projects, and discuss inheritance and access modifiers (public, private, protected). Git commands were also covered. A scenario-based question was presented: "How would you send an email to a million users, ensuring that if an email fails, the system retries sending it three times? If the retries fail, the system should move on to the next email. Additionally, if the system crashes after sending 1000-2000 emails, how would you ensure that upon restart, it resumes from where it left off without resending emails?"

The HR was friendly, clearly explained the next steps, and provided constructive feedback. Overall, it was a positive interview experience.