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BigData / Data Lake Interview questions

What are Data Lake migration strategies from on-premises to cloud?

Migrating on-premises data lakes to cloud requires planning data transfer, application migration, and validation. Strategies: lift-and-shift (replicate infrastructure in cloud), replatform (move to cloud-native services), refactor (redesign for cloud). Approaches: one-time bulk transfer using AWS Snowball/Azure Data Box, continuous replication using AWS DataSync/Azure File Sync, hybrid (keep on-prem, extend to cloud). Phases: assess current state, design target architecture, pilot migration, incremental cutover, decommission on-prem. Best practices: start with non-critical workloads, validate data integrity, test performance, train teams, plan rollback.

What physical device enables bulk data transfer to AWS?
Which migration strategy redesigns for cloud-native?

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