- A
Amazon Aurora
Why wrong: Amazon Aurora is a relational database compatible with MySQL and PostgreSQL. While it offers high performance and multi-Region replication, it does not guarantee single-digit millisecond latency at the massive scale of millions of requests per second, nor does it provide the same seamless scaling as DynamoDB for high-velocity workloads.
- B
Amazon DynamoDB
Amazon DynamoDB is a fully managed NoSQL database that delivers consistent single-digit millisecond latency at any scale. It supports global tables for multi-Region replication and automatic scaling to handle millions of requests per second. It also provides built-in backup and restore, meeting all stated requirements.
- C
Amazon RDS for MySQL
Why wrong: Amazon RDS for MySQL is a relational database service that scales vertically and horizontally with read replicas, but it is not designed for single-digit millisecond latency at extreme throughput levels. It also requires manual sharding for very high write volumes and does not offer native multi-Region replication for disaster recovery.
- D
Amazon Redshift
Why wrong: Amazon Redshift is a petabyte-scale data warehouse service optimized for analytical queries and large-scale reporting. It is not suitable for low-latency transactional workloads and does not provide single-digit millisecond responsiveness for high-velocity read/write operations.
Quick Answer
Amazon DynamoDB is the correct choice because it is a fully managed NoSQL database designed for global, low-latency workloads, delivering single-digit millisecond latency at any scale while seamlessly handling millions of requests per second. Its DynamoDB Global Tables feature automatically replicates data across multiple AWS Regions, ensuring both disaster recovery and low-latency reads for a global e-commerce application, all backed by built-in automatic backup and restore. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of which service meets the specific combination of global replication, performance, and full management—a common trap is confusing DynamoDB with Amazon RDS or Aurora, which are relational and lack native multi-Region replication at this speed. Remember the memory tip: DynamoDB is the "global, fast, and serverless" database for key-value and document workloads, so when you see "global low latency NoSQL database" in a scenario, think DynamoDB Global Tables.
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 company is building a global e-commerce application that requires a database with single-digit millisecond latency, seamless scaling to handle millions of requests per second, and the ability to replicate data across multiple AWS Regions for disaster recovery and low-latency reads. The database must be fully managed with automatic backup and restores. Which AWS service should the company choose?
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 the correct choice because it is a fully managed NoSQL key-value and document database that delivers single-digit millisecond latency at any scale, supports automatic multi-Region replication via DynamoDB Global Tables for disaster recovery and low-latency reads, and provides built-in backup and restore capabilities. This combination of performance, seamless scaling to millions of requests per second, and global replication aligns perfectly with the requirements of a global e-commerce application.
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 Aurora
Why it's wrong here
Amazon Aurora is a relational database compatible with MySQL and PostgreSQL. While it offers high performance and multi-Region replication, it does not guarantee single-digit millisecond latency at the massive scale of millions of requests per second, nor does it provide the same seamless scaling as DynamoDB for high-velocity workloads.
- ✓
Amazon DynamoDB
Why this is correct
Amazon DynamoDB is a fully managed NoSQL database that delivers consistent single-digit millisecond latency at any scale. It supports global tables for multi-Region replication and automatic scaling to handle millions of requests per second. It also provides built-in backup and restore, meeting all stated requirements.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon RDS for MySQL
Why it's wrong here
Amazon RDS for MySQL is a relational database service that scales vertically and horizontally with read replicas, but it is not designed for single-digit millisecond latency at extreme throughput levels. It also requires manual sharding for very high write volumes and does not offer native multi-Region replication for disaster recovery.
- ✗
Amazon Redshift
Why it's wrong here
Amazon Redshift is a petabyte-scale data warehouse service optimized for analytical queries and large-scale reporting. It is not suitable for low-latency transactional workloads and does not provide single-digit millisecond responsiveness for high-velocity read/write operations.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose Amazon Aurora because of its familiarity with relational databases and its 'high performance' reputation, but they overlook the specific requirement for single-digit millisecond latency at millions of requests per second, which is a key-value/NoSQL workload that DynamoDB is purpose-built for, not a relational database.
Detailed technical explanation
How to think about this question
DynamoDB achieves single-digit millisecond latency through its distributed architecture that partitions data across multiple nodes using consistent hashing, and it scales automatically by splitting partitions as throughput increases. DynamoDB Global Tables use active-active replication across AWS Regions, leveraging DynamoDB Streams to capture item-level changes and propagate them asynchronously with eventual consistency, enabling low-latency reads from any region while maintaining disaster recovery capabilities. The service also offers point-in-time recovery (PITR) and on-demand backup, ensuring automated restores without manual intervention.
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
Got this wrong? Here's your next step.
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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 the correct choice because it is a fully managed NoSQL key-value and document database that delivers single-digit millisecond latency at any scale, supports automatic multi-Region replication via DynamoDB Global Tables for disaster recovery and low-latency reads, and provides built-in backup and restore capabilities. This combination of performance, seamless scaling to millions of requests per second, and global replication aligns perfectly with the requirements of a global e-commerce application.
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 company is building a web application that requires a fully managed NoSQL database with single-digit millisecond latency at any scale. The application will experience unpredictable traffic spikes, and the database must automatically scale throughput capacity up and down without manual intervention. The developers want to focus on application code rather than database management tasks. Which AWS database service should the company choose?
medium- A.Amazon RDS for MySQL
- ✓ B.Amazon DynamoDB
- C.Amazon Redshift
- D.Amazon ElastiCache
Why B: Amazon DynamoDB is a fully managed NoSQL key-value and document database that delivers single-digit millisecond latency at any scale. It supports automatic scaling of read/write throughput capacity via Auto Scaling policies, eliminating the need for manual intervention. This makes it ideal for web applications with unpredictable traffic spikes, as it offloads all database management tasks to AWS.
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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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