- A
Amazon RDS for MySQL
Why wrong: Amazon RDS is a relational database service, not a NoSQL database. It does not natively provide single-digit millisecond latency at any scale or automatic throughput scaling in the same way as DynamoDB. RDS supports Multi-AZ for high availability but is not designed for the flexible, low-latency workload described.
- B
Amazon DynamoDB
Amazon DynamoDB is the correct answer. It is a fully managed NoSQL service that delivers consistent single-digit millisecond latency at any scale. It automatically scales read/write throughput based on traffic patterns and replicates data across three Availability Zones in an AWS Region by default, meeting all requirements.
- C
Amazon Redshift
Why wrong: Amazon Redshift is a petabyte-scale data warehouse designed for analytical and complex query workloads, not for high-traffic, low-latency transactional operations. It does not provide single-digit millisecond latency for real-time reads and writes, and it is not a NoSQL database.
- D
Amazon ElastiCache for Redis
Why wrong: Amazon ElastiCache is an in-memory caching service, not a primary durable database. While it can provide extremely low latency, it is typically used to accelerate queries to a backing database. It is not designed for persistent, durable data storage with automatic throughput scaling as the primary data store.
Quick Answer
The answer is Amazon DynamoDB. This fully managed NoSQL database is the correct choice because it delivers consistent single-digit millisecond response times at any scale, automatically adjusts throughput capacity up and down based on traffic through its auto scaling feature, and replicates data across multiple Availability Zones for high availability and durability. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of which AWS service pairs a NoSQL data model with automatic scaling and multi-AZ replication—a common trap is confusing DynamoDB with Amazon RDS or Aurora, which are relational databases, or with ElastiCache, which is an in-memory cache rather than a persistent database. Remember that when you see keywords like “NoSQL,” “auto scaling throughput,” “single-digit millisecond latency,” and “fully managed,” DynamoDB is almost always the answer. A helpful memory tip: think of DynamoDB as the “dynamic NoSQL database” that dynamically scales both reads and writes to match your traffic.
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.
A fast-growing mobile game company uses a NoSQL database to store player profiles, leaderboards, and game state. The database must deliver consistent single-digit millisecond response times regardless of the number of concurrent players. The company wants a fully managed service that automatically scales throughput capacity up and down based on traffic and replicates data across multiple Availability Zones for high availability. Which AWS service should the company use?
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 database service that delivers consistent single-digit millisecond latency at any scale. It supports automatic scaling of throughput capacity based on traffic patterns and replicates data across multiple Availability Zones (AZs) for high availability and durability, making it the ideal choice for a fast-growing mobile game company.
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 for MySQL
Why it's wrong here
Amazon RDS is a relational database service, not a NoSQL database. It does not natively provide single-digit millisecond latency at any scale or automatic throughput scaling in the same way as DynamoDB. RDS supports Multi-AZ for high availability but is not designed for the flexible, low-latency workload described.
- ✓
Amazon DynamoDB
Why this is correct
Amazon DynamoDB is the correct answer. It is a fully managed NoSQL service that delivers consistent single-digit millisecond latency at any scale. It automatically scales read/write throughput based on traffic patterns and replicates data across three Availability Zones in an AWS Region by default, meeting all requirements.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Redshift
Why it's wrong here
Amazon Redshift is a petabyte-scale data warehouse designed for analytical and complex query workloads, not for high-traffic, low-latency transactional operations. It does not provide single-digit millisecond latency for real-time reads and writes, and it is not a NoSQL database.
- ✗
Amazon ElastiCache for Redis
Why it's wrong here
Amazon ElastiCache is an in-memory caching service, not a primary durable database. While it can provide extremely low latency, it is typically used to accelerate queries to a backing database. It is not designed for persistent, durable data storage with automatic throughput scaling as the primary data store.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Amazon ElastiCache for Redis (a caching layer) with a primary NoSQL database, overlooking that DynamoDB is the fully managed, auto-scaling, multi-AZ NoSQL service designed for consistent low-latency workloads.
Detailed technical explanation
How to think about this question
DynamoDB uses a distributed architecture with automatic partitioning and replication across multiple AZs, ensuring that read and write requests are consistently served with single-digit millisecond latency even as traffic spikes. Its on-demand capacity mode automatically scales throughput based on actual traffic, eliminating the need for capacity planning, while global tables can provide multi-region replication for disaster recovery. In a real-world mobile game scenario, DynamoDB can handle millions of concurrent player sessions updating leaderboards and game state without performance degradation.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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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 database service that delivers consistent single-digit millisecond latency at any scale. It supports automatic scaling of throughput capacity based on traffic patterns and replicates data across multiple Availability Zones (AZs) for high availability and durability, making it the ideal choice for a fast-growing mobile game company.
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 →
Same concept, more angles
1 more ways this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A gaming company needs a database that can handle millions of requests per second with consistent single-digit millisecond latency and automatically scales without any capacity planning. Which AWS database service meets these requirements?
easy- A.Amazon RDS for MySQL
- B.Amazon Aurora
- ✓ C.Amazon DynamoDB
- D.Amazon Redshift
Why C: Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers consistent single-digit millisecond latency at any scale. It automatically scales throughput capacity via on-demand mode, eliminating the need for capacity planning, and can handle millions of requests per second, making it ideal for high-traffic gaming workloads.
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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