Interview Pro Tip
Red Flag: 'I just picked one' or ignoring trade-offs. Pro-Move: Show a structured process (POC, criteria, documentation) and willingness to revisit if assumptions change.
**Situation**: We had to choose between two cloud providers (GCP vs AWS) for a new data platform. Pricing was opaque, performance benchmarks were incomplete, and we had a 4-week window to decide. **Task**: Make a defensible choice with incomplete data. **Action**: I ran a time-boxed evaluation: (1) POC of core workloads (batch ETL, streaming, ad-hoc queries) on both platforms. (2) Benchmarked latency and cost for our typical queries....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Presidio, Swiggy. The answer also includes follow-up discussion points that interviewers commonly explore.
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