Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company is developing a mobile application that requires a database to store user session data and preferences. The data is accessed very frequently with low-latency requirements, and the access patterns are unpredictable – the application experiences sudden spikes in read and write traffic. The company wants a fully managed database service that automatically scales to handle the workload, requires no patching or server administration, and charges based on the throughput consumed rather than on provisioned capacity. Which AWS service meets these requirements?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Amazon RDS for MySQL
Amazon RDS is a managed relational database service, but it requires managing database instances, does not automatically scale throughput, and is not designed for unpredictable, high-traffic key-value workloads like session data. It is better suited for traditional relational workloads.
B
Best answer
Amazon DynamoDB
Amazon DynamoDB is a fully managed NoSQL database that provides single-digit millisecond performance at any scale. It supports on-demand capacity mode, which automatically scales to accommodate traffic spikes and charges per request, eliminating the need for provisioning. It is ideal for session storage, gaming, and real-time applications.
C
Distractor review
Amazon Redshift
Amazon Redshift is a petabyte-scale data warehouse used for analytical queries on large datasets. It is not optimized for low-latency, high-frequency point lookups or writes, and requires cluster management. It does not fit the use case of a session database.
D
Distractor review
Amazon EBS
Amazon EBS provides block-level storage volumes for use with Amazon EC2 instances. It is not a database service and does not offer query capabilities, automatic scaling, or throughput-based pricing. It simply provides raw storage that must be managed by the operating system.
Common exam trap
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.
Technical deep dive
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Amazon DynamoDB — Amazon DynamoDB is a fully managed NoSQL database designed for low-latency, high-throughput workloads with unpredictable access patterns. It offers on-demand capacity mode, which automatically scales to handle traffic spikes and charges only for the reads and writes consumed. DynamoDB does not require any server management, patching, or manual scaling. In contrast, Amazon RDS is a managed relational database but requires instance management and does not auto-scale throughput; Amazon Redshift is a data warehouse for analytics; Amazon EBS is block storage, not a database.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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