- A
Amazon RDS
Why wrong: RDS is a managed relational database service, not a NoSQL service.
- B
Amazon Redshift
Why wrong: Redshift is a data warehouse optimized for analytics, not a general-purpose NoSQL database.
- C
Amazon DynamoDB
DynamoDB is AWS's serverless, fully managed NoSQL database with guaranteed single-digit millisecond latency.
- D
Amazon ElastiCache
Why wrong: ElastiCache is an in-memory caching service (Redis/Memcached), not a primary NoSQL database.
Question 378 of 1,024
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which AWS service provides a fully managed NoSQL database designed for single-digit millisecond performance at any scale?
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
✓
Amazon DynamoDB
Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers consistent single-digit millisecond latency at any scale. It achieves this through its distributed architecture, automatic partitioning, and SSD-backed storage, making it ideal for high-traffic web applications, gaming, and IoT workloads.
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.
- ✗
Amazon RDS
Why it's wrong here
RDS is a managed relational database service, not a NoSQL service.
- ✗
Amazon Redshift
Why it's wrong here
Redshift is a data warehouse optimized for analytics, not a general-purpose NoSQL database.
- ✓
Amazon DynamoDB
Why this is correct
DynamoDB is AWS's serverless, fully managed NoSQL database with guaranteed single-digit millisecond latency.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon ElastiCache
Why it's wrong here
ElastiCache is an in-memory caching service (Redis/Memcached), not a primary NoSQL database.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon ElastiCache (an in-memory cache) with a NoSQL database, but ElastiCache is not a persistent database and lacks the durability and querying capabilities of DynamoDB.
Detailed technical explanation
How to think about this question
DynamoDB uses a distributed hash table with automatic replication across multiple Availability Zones, and its consistent performance is maintained through adaptive capacity and auto-scaling. Under the hood, it partitions data by primary key and uses a leaderless replication model to ensure low-latency reads and writes, even as data grows to terabytes or more. A real-world scenario is a mobile gaming leaderboard that requires sub-10ms updates for millions of concurrent players, where DynamoDB's DAX (DynamoDB Accelerator) can further reduce read latency to microseconds.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon DynamoDB — Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers consistent single-digit millisecond latency at any scale. It achieves this through its distributed architecture, automatic partitioning, and SSD-backed storage, making it ideal for high-traffic web applications, gaming, and IoT workloads.
What should I do if I get this CLF-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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
This CLF-C02 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 CLF-C02 exam.
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