Question 1

Explain your job to a kid.

Accepted Answer

**Analogy**: 'Imagine a library with scattered books. I organize them so when someone asks "How many dog books this week?" or "Which are popular?" we answer quickly. I build systems that collect info from clicks, purchases; put it in order for computers to answer. I make sure it's correct and reaches the right people....

Question 2

How do you deal with failed large file processing when a file fails at the final 10%?

Accepted Answer

**Situation**: 10% remaining = 90% work lost if restart from scratch.

**Approach**: (1) Chunking—process by offset/record count; checkpoint progress; resume from last successful chunk; (2) Idempotency—reprocess produces same result; (3) Retry with backoff—transient may succeed; (4) Partial commit—save completed; retry only failed portion; (5) Triage—transient vs persistent (bad data)....

Question 3

How do you handle fluctuations in active users?

Accepted Answer

**Strategies**: (1) Auto-scale—K8s HPA, Lambda, Spark dynamic allocation; (2) Queueing—Kafka/SQS buffer; (3) Caching—reduce backend load; (4) Rate limiting—protect spikes; (5) Observability—monitor load, latency. Predictable spikes (events): pre-scale....

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Gartner General Interview Questions

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All 3 Questions

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