You don't need to use AWS in your answer. But referencing relevant services shows familiarity with Amazon's stack.
Services worth knowing:
- S3: Object storage. Unlimited scale, nines durability.
- DynamoDB: NoSQL database. Single-digit millisecond reads at any scale.
- SQS: Message queue. Decouples services.
- Lambda: Serverless compute. Pay per invocation.
- CloudFront: CDN. Global content delivery.
- ElastiCache: Managed Redis. In-memory caching.
- RDS: Managed SQL databases (MySQL, PostgreSQL).
Only mention services you can explain. Name-dropping without understanding backfires.