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AWS Certified Cloud Practitioner (CLF-C02) | Domain 4 Cost Explorer, Budgets, and Cost Allocation Questions 04

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Problem 1

An AWS organization has separate member accounts for production, testing, and development. A finance analyst wants to isolate only Amazon EC2 costs incurred by the production account and review the breakdown by usage type.

Which Cost Explorer configuration is most appropriate?

View explanation

As of August 22, 2026, filters of different types in Cost Explorer can narrow the view to their intersection. To isolate only production EC2 costs, both Service and Linked account must be specified, and grouping by Usage type provides the requested breakdown. Filtering only by linked account leaves other production services, while filtering only by service includes EC2 costs from other accounts.

Problem 2

Cost Explorer has been enabled in a new AWS account. The account has only two weeks of usage history. The analyst has permission to view Cost Explorer, but no future cost forecast appears.

Which explanation is most reasonable?

View explanation

As of August 22, 2026, Cost Explorer forecasts are based on historical usage and do not appear when there is not enough history to produce an 80% prediction interval. AWS notes that this commonly occurs in accounts with less than one full billing cycle. View permission does not resolve insufficient history, and neither an RI purchase nor CloudWatch Logs delivery is a forecasting prerequisite.

Problem 3

A company purchased a one-year All Upfront Savings Plan in September. A finance analyst wants to compare the effective compute cost for each month without making only the upfront month appear unusually expensive.

Which cost view should the analyst use in Cost Explorer?

View explanation

As of August 22, 2026, the amortized cost view in Cost Explorer distributes upfront Savings Plans and RI fees across the commitment term, making effective daily or monthly costs easier to compare. Distributing the one-year upfront fee across the term fits this objective. Amortization is an analytical view; it does not change the actual September charge or its payment timing.

Problem 4

An account has sufficient usage history. Its monthly budget is USD 10,000, and the team wants an alert before actual spending exceeds the budget, as soon as the month-end forecast reaches 80% of the budget.

Which AWS Budgets notification condition should be selected?

View explanation

As of August 22, 2026, AWS Budgets can evaluate either actual or forecasted values. A forecasted threshold of 80% meets the requirement to warn based on the month-end estimate before an actual overrun. An actual 100% alert arrives too late for this objective, while Savings Plans utilization is different from cost budget consumption. Forecast alerts also require sufficient history.

Problem 5

From an AWS Organizations management account, a company wants to automatically prevent a selected member account from creating new AWS resources when the month-end forecast reaches 90% of its budget. The required role and permissions for AWS Budgets can be configured.

Which approach best meets the requirement?

View explanation

As of August 22, 2026, AWS Budgets actions can apply an IAM policy or SCP automatically or after manual approval when a threshold is reached. An automatic action that applies an SCP from the management account fits the requirement to restrict creation in a member account. A notification alone does not change permissions, and neither Cost Explorer nor CUR executes governance controls.

Problem 6

A service normally uses more resources every weekend, so a fixed monthly spending ceiling cannot easily distinguish expected growth from an unusual spike. The team wants to detect deviations from historical spending patterns and investigate contributing services or accounts.

Which feature is most appropriate for this objective?

View explanation

As of August 22, 2026, AWS Cost Anomaly Detection uses machine learning to evaluate spending patterns, including seasonality and natural growth, and detect unusual spend and its cost impact. It also provides potential root causes such as service, account, Region, and usage type. Its purpose differs from fixed-threshold management in AWS Budgets, and it does not guarantee that usage will be blocked before an anomaly occurs.

Problem 7

A FinOps team wants to retain hourly AWS cost and usage line items continuously and repeatedly analyze data that includes cost allocation tags by using standard SQL.

Which architecture best meets the requirements?

View explanation

As of August 22, 2026, AWS Cost and Usage Reports deliver detailed cost and usage line items to a designated S3 bucket and can support hourly, daily, or monthly analysis including tags. Selecting the Athena integration enables repeated SQL analysis of the data in S3. Budgets is for alerts and controls, while CloudTrail primarily records API activity and does not replace detailed billing line items.

Problem 8

An analyst applied a user-defined Project tag to supported resources. Immediately afterward, the tag cannot be selected as a cost allocation dimension in Cost Explorer or billing reports.

Which next step is appropriate?

View explanation

As of August 22, 2026, a user-defined resource tag must be activated on the Cost allocation tags page in Billing and Cost Management before it can be used for billing analysis. It can take up to 24 hours for the key to appear and up to another 24 hours for activation. IAM tags, CloudWatch metrics, and the Support plan do not replace this activation step.

Problem 9

A Department cost category has these regular rules in order. Rule 1 assigns Amazon EC2 service line items to Shared. Rule 2 assigns line items with the Team=Marketing cost allocation tag to Marketing. The default for unmatched items is Other. One EC2 line item also has Team=Marketing.

Which cost category value is assigned to this line item?

View explanation

As of August 22, 2026, regular Cost Categories rules are evaluated from top to bottom, and the first matching rule determines the value when several rules match. This line item first matches the Amazon EC2 condition in Rule 1 and is assigned to Shared, so the later Marketing rule does not overwrite it. It is not counted in both values, and the default applies only when no rule matches.

Problem 10

A company wants to allocate costs categorized as Shared Platform internally, assigning 70% to Engineering and 30% to Marketing. It does not need this allocation to rewrite the AWS invoice or the underlying data in Cost Explorer.

Which combination of configuration and verification location is appropriate?

View explanation

As of August 22, 2026, a specified allocation percentage calls for the fixed method, configured as 70% for Engineering and 30% for Marketing. The allocated amounts are viewed on the Cost Categories details page. Split charge results do not affect CUR, Cost Explorer, other underlying cost data, or the AWS invoice, so options that rewrite billed amounts or historical line items are incorrect.