CLF-C02 Billing, Pricing, and Support Practice Test 12 — 15 Questions

Question 1

A company has unpredictable, short-lived batch processing workloads that can be interrupted. Which EC2 purchasing option would provide the lowest cost for these workloads?

Accepted Answer

Spot Instances. Spot Instances (Option C) are the correct choice because they offer unused EC2 capacity at steep discounts (up to 90% off On-Demand) and are ideal for fault-tolerant, flexible, short-lived, or interruptible workloads. Since the company's batch processing jobs are unpredictable and can be interrupted, Spot Instances provide the lowest cost while tolerating the risk of termination when AWS needs the capacity back.

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On-Demand Instances

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Reserved Instances (1-year, No Upfront)

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Dedicated Hosts

Question 2

A company uses AWS Organizations. They want to ensure that member accounts cannot turn off CloudTrail or AWS Config in their accounts. What is the most effective way to enforce this?

Accepted Answer

Apply Service Control Policies (SCPs) at the organization level. Service Control Policies (SCPs) are the most effective way to enforce guardrails across all member accounts in AWS Organizations. SCPs can deny the ability to disable CloudTrail or AWS Config at the organization, organizational unit (OU), or account level, and they cannot be overridden by IAM policies in member accounts. This ensures that even account administrators cannot turn off these services, providing a centralized security control.

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Configure IAM policies in each account to deny these actions

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Use AWS Config rules to detect and alert on violations

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Enable MFA delete on all accounts

Question 3

Which AWS service provides detailed billing reports that can be delivered hourly to Amazon S3 for custom analysis with tools like Amazon Athena or Redshift?

Accepted Answer

AWS Cost and Usage Report (CUR). AWS Cost and Usage Report (CUR) is the correct service because it provides the most granular billing data, including hourly usage and cost details, which can be delivered to an Amazon S3 bucket. This allows you to use analytics tools like Amazon Athena or Amazon Redshift to run custom queries and perform in-depth analysis on the raw billing data.

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AWS Cost Explorer

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AWS Budgets

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Amazon CloudWatch Billing Metrics

Question 4

A company wants to purchase EC2 capacity that provides a discount over On-Demand pricing and is available only when AWS has excess capacity, with the option of interruption with a 2-minute warning. Which option is this?

Accepted Answer

Spot Instances. Spot Instances (Option C) are correct because they offer a significant discount over On-Demand pricing but can be interrupted by AWS with a 2-minute warning when AWS needs the capacity back. This matches the scenario of purchasing EC2 capacity that is available only when AWS has excess capacity and includes the risk of interruption.

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Reserved Instances

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On-Demand Instances

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Dedicated Instances

Question 5

Which AWS service provides recommendations to help reduce costs, such as identifying idle EC2 instances, underutilized EBS volumes, and unassociated Elastic IPs?

Accepted Answer

AWS Trusted Advisor. AWS Trusted Advisor is the correct service because it provides automated cost optimization recommendations by analyzing your AWS environment. It specifically identifies idle EC2 instances, underutilized EBS volumes, and unassociated Elastic IPs, which are common sources of wasted spend. These checks are part of the cost optimization category within Trusted Advisor, and they help you reduce costs by right-sizing or releasing unused resources.

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AWS Cost Explorer

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Amazon CloudWatch

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AWS Pricing Calculator

Question 6

A company received an unexpected AWS bill that was much higher than expected. Which AWS service would help them understand which resource or service caused the cost spike?

Accepted Answer

AWS Cost Explorer. AWS Cost Explorer (B) is the correct service because it provides a pre-built dashboard and reports that allow you to visualize, analyze, and drill down into your AWS costs and usage over time. You can filter by service, linked account, region, or resource tags to identify exactly which resource or service caused the unexpected cost spike. AWS Budgets (A) can alert you when costs exceed a threshold, but it does not provide the historical analysis and granular breakdown needed to pinpoint the root cause of a past spike.

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AWS Budgets

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AWS Pricing Calculator

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AWS Trusted Advisor

Question 7

Which AWS pricing concept means you pay a lower per-unit price when you use more of a service, such as S3 charging less per GB as storage volume increases?

Accepted Answer

Tiered pricing (volume discounts). B is correct because tiered pricing (volume discounts) is the AWS pricing model where the per-unit cost decreases as usage increases. For example, Amazon S3 charges a lower per-GB rate for larger storage volumes, such as $0.023 per GB for the first 50 TB and $0.022 per GB for the next 450 TB, directly reflecting volume-based discounts.

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Pay-as-you-go pricing

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Reserved pricing

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Spot pricing

Question 8

A company is using several AWS services and has noticed their bill has been increasing. They want to identify which team or project is responsible for each cost. Which AWS feature enables tracking costs by team, project, or environment?

Accepted Answer

AWS Cost Allocation Tags. AWS Cost Allocation Tags allow you to tag AWS resources with metadata (e.g., team, project, environment) and then activate those tags in the Billing and Cost Management console. Once activated, AWS generates cost reports that break down charges by those tag values, enabling you to attribute costs to specific teams or projects. This is the native AWS feature designed specifically for cost allocation and tracking.

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AWS Organizations consolidated billing

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AWS Budgets

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AWS Config tags

Question 9

Which AWS support feature provides a dedicated technical contact who provides proactive guidance, acts as an advocate for the customer, and helps with architectural reviews?

Accepted Answer

Technical Account Manager (TAM). The Technical Account Manager (TAM) is the correct answer because it is a dedicated AWS support resource, available only with the Enterprise Support plan, that provides proactive guidance, acts as a customer advocate, and conducts architectural reviews. Unlike other support roles, the TAM is assigned to a specific customer to help optimize their AWS environment, coordinate with AWS teams, and ensure the customer gets the most value from their investment.

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AWS Solutions Architect

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AWS IQ Expert

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AWS Support Engineer

Question 10

A company is using Amazon EC2 and wants to understand the difference between Compute Savings Plans and EC2 Instance Savings Plans. Which statement is accurate?

Accepted Answer

Compute Savings Plans apply to any EC2 instance, Fargate, and Lambda usage, while EC2 Instance Savings Plans apply to a specific instance family and region. Compute Savings Plans offer the broadest flexibility, automatically applying to any EC2 instance (regardless of family, size, or region), as well as AWS Fargate and AWS Lambda usage. In contrast, EC2 Instance Savings Plans are restricted to a specific instance family within a chosen region, providing a narrower scope of coverage. This distinction is fundamental to understanding how each plan optimizes costs based on workload flexibility.

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Compute Savings Plans provide higher discounts than EC2 Instance Savings Plans

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EC2 Instance Savings Plans are more flexible and apply across all instance families

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Both Savings Plans types require specifying the exact instance size at purchase

Question 11

A company processes large amounts of data with Amazon EC2 and exports the results to customers globally via the internet. Which AWS cost component will be their largest variable cost?

Accepted Answer

Data transfer out of AWS to the internet (outbound). Data transfer out of AWS to the internet (outbound) is typically the largest variable cost for workloads that export large results to global customers. AWS charges per GB for outbound data transfer, and rates increase with volume, while inbound data transfer is free. For a company processing large datasets on EC2 and sending results to customers via the internet, outbound traffic dominates the data transfer bill.

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Data transfer into AWS (inbound)

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Data transfer between EC2 instances in the same Availability Zone

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API calls to AWS services

Question 12

Which AWS feature allows multiple AWS accounts to be managed under one umbrella, receive a single consolidated bill, and potentially share volume discounts?

Accepted Answer

AWS Organizations. AWS Organizations is the correct service because it provides centralized management of multiple AWS accounts, enabling a single consolidated bill and the ability to aggregate usage across accounts to qualify for volume discounts. It allows you to create a hierarchy of accounts with organizational units (OUs) and apply service control policies (SCPs) for governance, while the consolidated billing feature combines all usage into a single payer account for pricing benefits.

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AWS Control Tower

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AWS IAM Identity Center

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AWS Cost Explorer

Question 13

A company wants to ensure they never spend more than $500 per month on AWS services. Which AWS feature can automatically stop or terminate resources when cost projections reach a threshold?

Accepted Answer

AWS Budgets Actions. AWS Budgets Actions allow you to define cost and usage budgets with automated responses, such as stopping or terminating EC2 instances, when actual or forecasted costs exceed a specified threshold. This directly meets the requirement to enforce a $500 monthly spending limit without manual intervention. Budget alerts alone only notify you; they do not take automated actions.

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AWS Budgets with budget alerts only

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AWS Cost Explorer spending forecasts

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AWS Service Quotas

Question 14

Which statement about AWS data transfer pricing is correct?

Accepted Answer

Data transfer into AWS from the internet is free; outbound data transfer to the internet is charged. AWS does not charge for data transfer into AWS from the internet, but it does charge for outbound data transfer from AWS to the internet. This pricing model is fundamental to AWS's cost structure, encouraging data ingestion while charging for egress. For example, data uploaded to Amazon S3 is free, but downloading that data to the internet incurs per-GB charges.

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All data transfer into and out of AWS is free

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Data transfer between EC2 instances in different Availability Zones is free

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Data transfer between AWS Regions is free because it stays within AWS infrastructure

Question 15

A company wants to use AWS for a short-term proof-of-concept project lasting one month. They need EC2 instances and RDS databases but don't want any long-term commitment. Which pricing model is most appropriate?

Accepted Answer

On-Demand pricing. On-Demand pricing is the most appropriate for a short-term proof-of-concept lasting only one month because it requires no upfront payment or long-term commitment. You pay for compute and database capacity by the hour or second, and you can stop or terminate resources at any time without penalty. This aligns perfectly with the temporary, flexible nature of a one-month project.

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Reserved Instances (1-year, All Upfront)

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Savings Plans (3-year commitment)

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Spot Instances for all workloads