350-401 Cheat Sheet (High-Yield Review)
Last-minute review of key differences, traps, and high-yield topics.
Quick answers
- S3/EBS/EFS: know when each fits.
- ALB vs NLB: L7 features vs L4 performance.
- Security Group vs NACL: stateful vs stateless.
- Multi-AZ vs Read Replica: HA vs read scaling.
A cheat sheet is a list of repeatable decisions: what to check first, what it means, what to do next.
Use it as a fast refresher, then do timed questions immediately.
Continue in the app for deeper practice and explanations.
Free Practice Test
10 random questions from the ENCORE 350-401 Cheat Sheet bank. Instant feedback.
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- You want a quick baseline: 10-question mini test
- You plan to practice offline with packs in the app
- You want explanations + exam-style timed mode
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High-yield review list
- S3: durability, storage classes, lifecycle, replication.
- EC2: ASG + ALB patterns, placement, EBS vs instance store.
- VPC: routing, security groups vs NACLs, endpoints.
- Databases: RDS vs DynamoDB, Multi-AZ basics, read replicas.
- CloudFront: caching + origin patterns, signed URLs/cookies basics.
Topics & Skills Covered
- Routing & switching reminders
- Wireless basics
- Security checkpoints
- Virtualization essentials
- Automation basics
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Frequently Asked Questions
How should I use this cheat sheet?
Read quickly, then do a timed set. Every mistake becomes a rule you add to your notes.
How often to review?
Daily in the final week — 5–10 minutes is enough if you practice right after.
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