AWS Certified Developer Exam – 10 Lambda Practice Questions DVA C02
Preparing for the AWS Certified Developer Associate exam (DVA-C02)? In this episode, we walk through 10 Lambda-focused practice exam questions covering the most commonly tested scenarios — including async invocations, concurrency limits, SQS duplicate handling, VPC timeouts, and more.
✅ What's covered in this video:
EventBridge async invocations: max event age & retry attempts
S3 trigger failures & Lambda destinations
SQS visibility timeout vs processing time (duplicate messages)
API Gateway 429 throttling errors & concurrency limits
Provisioned concurrency on a schedule
Lambda in a VPC timing out (security groups & NACLs)
Designing for idempotency with SQS
API Gateway payload limits & S3 pre-upload pattern
Preventing duplicate DynamoDB writes with conditional writes
Stopping a Lambda function without modifying SNS (reserved concurrency = 0)
Whether you're just starting your AWS exam prep or doing a final review, these questions will sharpen your understanding of Lambda architecture and help you avoid common exam traps.
Chapters:
00:00 Welcome + What to Expect (10 Lambda Practice Questions)
00:18 Q1: EventBridge Async Invocations — Max Event Age & Retry Attempts
01:35 Q2: S3 Trigger Failures — Capture Events with Lambda Destinations
02:45 Q3: SQS Visibility Timeout vs Processing Time (Duplicate Messages)
03:50 Q4: API Gateway 429s — Fixing Lambda Concurrency Limits
04:27 Q5: Predictable Traffic Spikes — Scheduled Provisioned Concurrency
05:22 Q6: Lambda in a VPC Timing Out — Security Groups & NACLs
06:21 Q7: SQS Duplicate Deliveries — Design for Idempotency
07:10 Q8: API Gateway Payload Limits — Upload to S3, Pass the Key
08:10 Q9: Preventing Duplicate DynamoDB Writes — Conditional Writes / Idempotency
08:54 Q10: Temporarily Stop SNS-Invoked Lambda — Reserved Concurrency = 0
09:50 Wrap-Up + Like, Subscribe, and Next Episode
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