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AWS CLF-C02Free AWS Certified Cloud Practitioner practice test
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A startup runs a web application with unpredictable traffic spikes throughout the day. The team wants to minimize costs while keeping the application available at all times. They are comfortable with interruptions to a small batch-processing worker fleet but need the web tier always running. Which combination of EC2 purchasing options best meets this requirement?
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Q1. A startup runs a web application with unpredictable traffic spikes throughout the day. The team wants to minimize costs while keeping the application available at all times. They are comfortable with interruptions to a small batch-processing worker fleet but need the web tier always running. Which combination of EC2 purchasing options best meets this requirement?
Correct answer: B. Use Reserved Instances for the web tier and Spot Instances for the batch workers
Reserved Instances provide a significant discount (up to 72%) over On-Demand pricing for steady, predictable workloads like a web tier that must always run. Spot Instances offer up to 90% savings and are ideal for fault-tolerant, interruption-tolerant workloads like batch processing. Using Spot for the web tier (C) is risky because Spot can be reclaimed with a 2-minute warning, causing downtime. Dedicated Hosts (D) are used for licensing compliance and cost much more than necessary here. On-Demand for both (A) misses significant savings opportunities.
Q2. A company stores large video archives in Amazon S3. The files are uploaded once and accessed only during occasional legal reviews, which happen roughly twice a year. The company wants to minimize storage costs while still being able to retrieve files within hours when needed. Which S3 storage class is MOST cost-effective for this use case?
Correct answer: C. S3 Glacier Flexible Retrieval
S3 Glacier Flexible Retrieval offers very low storage cost with standard retrieval in 3–5 hours and expedited retrieval within minutes — meeting the hours-level requirement at minimal cost. Because the data is accessed only twice a year, Glacier's retrieval fees are negligible compared to the storage savings. S3 Standard (A) is designed for frequently accessed data and is unnecessarily expensive for this pattern. S3 Intelligent-Tiering (B) adds per-object monitoring fees and is best when access patterns are unknown, not when they are clearly infrequent. S3 One Zone-IA (D) stores data in a single AZ, adding durability risk without delivering storage costs as low as Glacier Flexible Retrieval.
Q3. An organization has multiple AWS accounts managed under AWS Organizations. The finance team wants a single, comprehensive file that shows resource usage and costs broken down by account, service, and custom cost allocation tags for detailed chargeback reporting. Which AWS tool delivers this?
Correct answer: C. AWS Cost and Usage Report (CUR)
The AWS Cost and Usage Report (CUR) is the most granular billing data source AWS provides. It delivers CSV or Parquet files to S3 containing every line-item charge across all accounts, broken down by service, resource, and any activated cost allocation tags — exactly what chargeback reporting requires. AWS Cost Explorer (A) provides interactive graphs and trend analysis but does not produce raw exportable files at line-item granularity. AWS Budgets (B) sends alerts when spending thresholds are crossed but does not produce usage reports. AWS Pricing Calculator (D) is used to estimate future costs before deploying resources, not to report on actual usage.
Q4. A solutions architect wants to commit to a consistent amount of compute spend (measured in $/hour) across any EC2 instance family, size, operating system, or AWS Region for the next three years. Which EC2 cost-saving mechanism offers this flexibility?
Correct answer: C. Compute Savings Plans
Compute Savings Plans apply to any EC2 instance regardless of instance family, size, OS, tenancy, or Region, and also cover AWS Fargate and AWS Lambda usage. They offer up to 66% savings versus On-Demand and provide the broadest flexibility. EC2 Instance Savings Plans (D) lock you to a specific instance family in a specific Region, offering slightly higher savings (up to 72%) but less flexibility. Standard Reserved Instances (A) are locked to instance type, OS, and Region. Convertible Reserved Instances (B) allow attribute changes but are still EC2-specific and cannot span Fargate or Lambda.
Q5. A company is evaluating its AWS support plan. They need access to the AWS Support API, a designated Technical Account Manager (TAM), and a response time of under 15 minutes for business-critical system outages. Which support plan is the MINIMUM tier that satisfies all three requirements?
Correct answer: D. Enterprise
Only the Enterprise support plan guarantees a less-than-15-minute response time for business-critical system down cases and provides a designated Technical Account Manager (TAM). The Enterprise On-Ramp plan (C) offers a 30-minute response time for business-critical cases and a pool of TAMs rather than a designated one — neither meets the under-15-minute requirement. Business (B) provides a 1-hour response for production system down cases and access to the AWS Support API, but no TAM and no 15-minute SLA. Developer (A) provides only business-hours email access with an initial response of up to 12 hours for general guidance.
Q6. During a monthly cost review, a cloud administrator notices unexpected charges for EC2 compute in an account. They need to visualize spending trends over the past 6 months, filter by service, and forecast costs for the next 3 months — all without writing any code or queries. Which AWS service is designed for this interactive analysis?
Correct answer: B. AWS Cost Explorer
AWS Cost Explorer provides an interactive console interface to visualize historical costs and usage up to 12 months back, filter by service, account, or tag, and generate forecasts for up to 12 months ahead — all without writing queries. The Cost and Usage Report (A) produces raw data files that require a separate analytics tool to visualize. Amazon QuickSight (C) is a general-purpose BI tool that can query CUR data but requires setup and query authoring. AWS Budgets (D) monitors spend against defined thresholds and sends alerts, but does not offer historical trend visualization or forecasting.
Q7. A company runs a regulated workload that requires dedicated physical servers to meet software licensing requirements tied to per-socket, per-core, or per-VM rules. The team also needs visibility into the number of physical sockets on the host. Which EC2 purchasing option is designed for this requirement?
Correct answer: C. Dedicated Hosts
Dedicated Hosts give you a physical server allocated to your account where you can see and control the socket, core, and VM placement details required for Bring Your Own License (BYOL) software licensing models. Dedicated Instances (A) also run on hardware dedicated to a single account, but they do not expose host-level details like socket counts — making them unsuitable for per-socket license audits. Capacity Reservations (B) reserve capacity in an AZ but do not guarantee physical server isolation or host visibility. On-Demand Instances with placement groups (D) optimize network performance or fault distribution but run on shared hardware.
Q8. A company uses AWS Organizations with 12 member accounts. They activate cost allocation tags on 'CostCenter' and 'Project' keys. After one billing cycle they notice that costs for several member accounts still appear under the payer account's untagged bucket. What is the MOST likely reason?
Correct answer: B. Resources in member accounts must be tagged after the tag is activated; existing resources already running are not retroactively tagged in reports
Cost allocation tags must be activated in the payer (management) account's Billing console, but they only appear in Cost and Usage Reports for charges incurred after activation. Resources that were already running and billed before the tag was activated will not be retroactively relabeled in prior billing data, and untagged resources show under an untagged bucket. Tags are activated on the payer (management) account for the entire organization, making option A incorrect. AWS Organizations fully supports consolidated billing with cost allocation tags, ruling out option C. Option D is partly true (tags can take up to 24 hours to become visible in reports) but they are never applied retroactively to pre-activation charges.
Q9. A developer wants to estimate the monthly cost of running a new three-tier web application on AWS before provisioning any resources. The estimate should account for specific instance types, data transfer out volumes, and an RDS Multi-AZ deployment. Which AWS tool should the developer use?
Correct answer: C. AWS Pricing Calculator
AWS Pricing Calculator is purpose-built for creating pre-deployment cost estimates. Users can model specific services, configure instance types, storage sizes, data transfer volumes, and Multi-AZ options to produce a detailed monthly estimate before spending any money. AWS Cost Explorer (A) analyzes actual historical spend and cannot project costs for resources that do not yet exist. AWS Trusted Advisor (B) reviews existing deployed resources for optimization and best-practice alignment but does not produce pre-deployment estimates. AWS Budgets (D) monitors actual or forecasted spending against user-defined thresholds but requires existing usage data.
Q10. A company wants to receive proactive, account-specific notifications about AWS service disruptions and scheduled maintenance events that could affect their specific resources in us-east-1. Which AWS tool provides personalized, account-level alerts about these events?
Correct answer: B. AWS Health Dashboard — Your account health tab
The AWS Health Dashboard's 'Your account health' tab (formerly called the Personal Health Dashboard) provides personalized alerts and remediation guidance for AWS events that affect your specific resources and account, including service disruptions and planned maintenance in the Regions you use. The 'Service history' tab (A) (formerly the Service Health Dashboard) shows the general public status of all AWS services globally but is not personalized to your account or resources. AWS Trusted Advisor (C) provides best-practice checks across cost, security, performance, and fault tolerance but does not send real-time service event alerts. Amazon CloudWatch Alarms (D) monitor metrics from your own applications and infrastructure, not AWS service health events.
Exam facts and objectives sourced from the official AWS certification page. Last reviewed June 2026.
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