SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 data analytics company is building a real-time streaming pipeline using Amazon Kinesis Data Streams. The data is consumed by multiple consumer applications, each with different processing requirements. The company wants to ensure that each consumer can process records independently without affecting others and can reprocess data from a specific point in time. Which feature should the company use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Enhanced Fan-Out with a timestamp to start reading.
Enhanced Fan-Out (EFO) provides each consumer with a dedicated 2 MB/second read throughput per shard, ensuring independent processing without contention. By using the SubscribeToShard API with a starting position specified via a timestamp, consumers can reprocess data from a specific point in time, meeting the requirement exactly.
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 Enhanced Fan-Out with a timestamp to start reading.
Why this is correct
Enhanced Fan-Out provides dedicated throughput per consumer and supports starting from a specific timestamp.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the data retention period to 365 days.
Why it's wrong here
Longer retention allows reprocessing but does not give independent throughput.
✗
Use resharding to increase the number of shards.
Why it's wrong here
Resharding changes shard count but does not provide independent processing or time-based reprocessing.
✗
Use the Kinesis Client Library (KCL) with checkpointing.
Why it's wrong here
KCL manages checkpoints but does not provide dedicated throughput per consumer or easy time-based reprocessing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse checkpointing (which manages consumer state but not throughput isolation) with Enhanced Fan-Out (which provides dedicated throughput and independent consumption), leading them to select the KCL with checkpointing option instead.
Detailed technical explanation
How to think about this question
Enhanced Fan-Out uses HTTP/2-based server-push technology to deliver records to each registered consumer over a persistent connection, eliminating the need for polling and reducing latency to under 200 milliseconds. The SubscribeToShard API supports starting positions such as AT_TIMESTAMP, TRIM_HORIZON, LATEST, or AT_SEQUENCE_NUMBER, allowing precise reprocessing from a historical point without impacting other consumers' throughput.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Enhanced Fan-Out with a timestamp to start reading. — Enhanced Fan-Out (EFO) provides each consumer with a dedicated 2 MB/second read throughput per shard, ensuring independent processing without contention. By using the SubscribeToShard API with a starting position specified via a timestamp, consumers can reprocess data from a specific point in time, meeting the requirement exactly.
What should I do if I get this SAP-C02 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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