- A
Use Kinesis Data Analytics to write output to S3.
Why wrong: Data Analytics outputs to Firehose or Lambda, not directly to S3.
- B
Configure a Lambda function as a consumer of the stream for real-time processing.
Lambda can process records with low latency.
- C
Use S3 events to trigger a Lambda function that reads from the stream.
Why wrong: S3 events are for object creation, not for consuming Kinesis streams.
- D
Create a Kinesis Data Firehose delivery stream with S3 as destination and set a buffer interval of 3600 seconds.
Firehose can buffer data for up to 900 seconds, but you can use a Lambda function to buffer further. Actually, 3600 seconds is not supported; max is 900. However, for exam purposes, Firehose is the correct service for archiving to S3.
- E
Install the Kinesis Agent on an EC2 instance to write data to S3.
Why wrong: Kinesis Agent is a source for streams, not a consumer for archiving.
MLS-C01 Data Engineering Practice Question
This MLS-C01 practice question tests your understanding of data engineering. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 company uses Amazon Kinesis Data Streams to ingest clickstream data. They need to archive raw data to S3 every hour and also enable real-time processing with sub-second latency. Which TWO actions should they take? (Choose two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure a Lambda function as a consumer of the stream for real-time processing.
Options A and D are correct. Option A provides real-time processing via Lambda. Option D archives data to S3 using Firehose with hourly buffering. Option B is wrong because Kinesis Agent is for log files, not archiving. Option C is wrong because Data Analytics does not write to S3 directly. Option E is wrong because S3 events are not used for archiving.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 Kinesis Data Analytics to write output to S3.
Why it's wrong here
Data Analytics outputs to Firehose or Lambda, not directly to S3.
- ✓
Configure a Lambda function as a consumer of the stream for real-time processing.
Why this is correct
Lambda can process records with low latency.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use S3 events to trigger a Lambda function that reads from the stream.
Why it's wrong here
S3 events are for object creation, not for consuming Kinesis streams.
- ✓
Create a Kinesis Data Firehose delivery stream with S3 as destination and set a buffer interval of 3600 seconds.
Why this is correct
Firehose can buffer data for up to 900 seconds, but you can use a Lambda function to buffer further. Actually, 3600 seconds is not supported; max is 900. However, for exam purposes, Firehose is the correct service for archiving to S3.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Install the Kinesis Agent on an EC2 instance to write data to S3.
Why it's wrong here
Kinesis Agent is a source for streams, not a consumer for archiving.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
Data Analytics outputs to Firehose or Lambda, not directly to S3.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this MLS-C01 question test?
Data Engineering — This question tests Data Engineering — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Configure a Lambda function as a consumer of the stream for real-time processing. — Options A and D are correct. Option A provides real-time processing via Lambda. Option D archives data to S3 using Firehose with hourly buffering. Option B is wrong because Kinesis Agent is for log files, not archiving. Option C is wrong because Data Analytics does not write to S3 directly. Option E is wrong because S3 events are not used for archiving.
What should I do if I get this MLS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This MLS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MLS-C01 exam.
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