The correct action is to implement retries with exponential backoff in the Lambda function for S3 put operations. This resolves the ProvisionedThroughputExceededException because S3 throttles requests when a bucket’s partition-level request rate limit is exceeded, and exponential backoff—where the function waits progressively longer intervals between retries—prevents overwhelming the bucket with repeated failed attempts, allowing transient capacity to recover. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your understanding of how Lambda interacts with S3 under high-throughput streaming ingestion from Kinesis; a common trap is assuming that increasing Lambda memory or timeout alone fixes throttling, but those address compute or duration limits, not S3’s request rate limits. Remember the mnemonic “Backoff for Backend”—when S3 says “slow down,” your code must back off exponentially, not just try again faster.
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A data engineering team is ingesting streaming data from IoT devices into Amazon Kinesis Data Streams. The data is then consumed by an AWS Lambda function that transforms each record and writes it to Amazon S3. Recently, the Lambda function started failing with 'ProvisionedThroughputExceededException' errors when writing to S3. The team has already increased the Lambda function's memory and timeout. Which action should the team take to resolve the issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement retries with exponential backoff in the Lambda function for S3 put operations.
The 'ProvisionedThroughputExceededException' error indicates that the Lambda function is being throttled by S3 due to exceeding the bucket's request rate limits. Implementing retries with exponential backoff in the Lambda function for S3 put operations is the correct solution because it allows the function to gracefully handle transient throttling errors by waiting progressively longer between retries, which aligns with AWS's guidance for managing S3 request rate limits.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use S3 Batch Operations to write data in batches.
Why it's wrong here
Batch Operations is for post-hoc processing, not real-time streaming writes.
✗
Increase the number of shards in the Kinesis data stream.
Why it's wrong here
This addresses Kinesis throughput but not S3 throttling.
✗
Enable S3 Transfer Acceleration on the destination bucket.
Why it's wrong here
This improves transfer speed but does not handle throttling errors.
✓
Implement retries with exponential backoff in the Lambda function for S3 put operations.
Why this is correct
This handles transient S3 throttling by retrying with backoff.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the source of the error (Kinesis vs. S3) and incorrectly assume that increasing Kinesis shards will fix the S3 throttling, or they mistake S3 Transfer Acceleration for a solution to rate limits when it only improves network latency.
Detailed technical explanation
How to think about this question
S3 buckets have a default request rate limit of 3,500 PUT requests per second per prefix, and exceeding this causes 'ProvisionedThroughputExceededException'. Exponential backoff with jitter is a standard retry strategy that reduces client-side contention and aligns with AWS SDK defaults; the Lambda function should catch the exception and retry with a delay that doubles each time (e.g., 100ms, 200ms, 400ms) up to a maximum. In real-world scenarios, this pattern is critical for bursty IoT workloads where multiple Lambda invocations simultaneously write to the same S3 prefix, and without retries, data loss can occur.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement retries with exponential backoff in the Lambda function for S3 put operations. — The 'ProvisionedThroughputExceededException' error indicates that the Lambda function is being throttled by S3 due to exceeding the bucket's request rate limits. Implementing retries with exponential backoff in the Lambda function for S3 put operations is the correct solution because it allows the function to gracefully handle transient throttling errors by waiting progressively longer between retries, which aligns with AWS's guidance for managing S3 request rate limits.
What should I do if I get this DEA-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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