InterviewCloud

AWS Interview Questions

AWS scenarios for data engineering, MLOps, Generative AI systems, deployment, monitoring, and certification planning.

5 questions
AWS

How would you deploy an ML model on AWS?medium

Type
scenario
Topic
sagemaker-ml-deploy
Frequency
common
Answer

Use a containerized model endpoint with CI/CD, monitoring, autoscaling, and rollback.

Explanation

A strong answer mentions SageMaker endpoints or ECS/EKS, model artifacts in S3, image registry in ECR, traffic shifting, CloudWatch metrics, alarms, and model/data drift checks.

Follow-upHow would you handle canary deployment?

How would you design a data lake on S3?medium

Type
scenario
Topic
s3-data-lake
Frequency
common
Answer

Separate raw, curated, and serving layers with cataloging, partitioning, security, and quality checks.

Explanation

Use S3 as storage, Glue Data Catalog for metadata, IAM and Lake Formation for access, Athena or Spark for querying, and lifecycle policies for cost control.

Follow-upHow do partitions affect query cost?

How would you build RAG with AWS services?hard

Type
scenario
Topic
bedrock-rag
Frequency
common
Answer

Ingest documents into S3, process chunks, embed them, store vectors, retrieve context, and generate with Bedrock.

Explanation

Typical pieces include S3, Lambda or Step Functions, Bedrock embeddings and generation, OpenSearch Serverless or a vector DB, IAM boundaries, citations, evaluation, and CloudWatch tracing.

Follow-upHow would you enforce document-level permissions?

When would you use Lambda vs ECS?medium

Type
conceptual
Topic
lambda-ecs
Frequency
common
Answer

Use Lambda for short event-driven tasks and ECS for long-running services, custom runtimes, or steady workloads.

Explanation

Interviewers expect tradeoffs around cold starts, runtime limits, cost profile, operational control, networking, scaling, and deployment complexity.

Follow-upWhen would EKS be justified?

Which AWS certifications support interview preparation?easy

Type
conceptual
Topic
cert-path
Frequency
common
Answer

Cloud Practitioner is optional; Solutions Architect Associate and ML/AI-focused certifications are more useful for interview depth.

Explanation

Treat certifications as structure, not proof. For interviews, prioritize architecture scenarios, IAM, networking, storage, monitoring, cost, and hands-on projects.

Follow-upWhat project would you build alongside the cert?