**Why S3 Cleanup:** Storage costs grow; lifecycle policies handle automated deletion but custom logic (retention by prefix, exclude patterns) needs scripting.
**Implementation:** list_objects_v2 with paginator (handles 1000+ keys). Filter by LastModified. delete_objects in batches of 1000 (max per request)—reduces API calls.
**Cost/Safety:** Each LIST = $0.005 per 1000; DELETE is free. Add dry-run mode. Use versioning + MFA delete for production....
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 Moonfare. The answer also includes follow-up discussion points that interviewers commonly explore.
Continue Reading the Full Answer
Unlock the complete expert answer with code examples, trade-offs, and pro tips - plus 1,863+ more.
Or upgrade to Platform Pro - $39
Engineers who used these answers got offers at
AmazonDatabricksSnowflakeGoogleMeta
According to DataEngPrep.tech, this is one of the most frequently asked Python/Coding interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.