Software Engineer Interview Questions
Technical coding, system design, and engineering behavioral questions
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Walk me through how you would design a URL shortener like bit.ly
Sample Answer:
I'd start by clarifying requirements: read/write ratio, expected scale, custom URLs. For architecture, I'd use a service to generate short codes, a database to store mappings, and a cache layer for frequently accessed URLs...
Implement a function to find the longest palindromic substring
Sample Answer:
I can solve this using dynamic programming or the expand-around-centers approach. The DP solution has O(n²) time complexity...
Tell me about a time you had to debug a particularly challenging issue
Sample Answer:
In my previous role, we had a memory leak that only occurred in production. I used profiling tools and systematic elimination to identify the root cause...
How would you explain APIs to a non-technical person?
Sample Answer:
I'd use the restaurant analogy - APIs are like waiters who take your order, communicate with the kitchen, and bring back your food...
What's the difference between SQL and NoSQL databases?
Sample Answer:
SQL databases are relational with ACID properties, while NoSQL offers flexibility with different data models like document, key-value, or graph...
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