Domain 1.5: Cost Optimization

An organization wants to allocate AWS costs to specific business units. They use AWS Organizations with consolidated billing. What is the MOST effective way to ensure all resources are properly categorized for chargeback?

A company has a predictable baseline of EC2 usage across multiple accounts in an AWS Organization. They want to reduce costs but need the flexibility to change instance families and regions in the future. Which pricing model should they purchase?

A company uses AWS Organizations with Consolidated Billing. They want to allocate costs to different business units based on resource usage. Some resources, like shared network infrastructure, cannot be directly tagged to a single business unit. How can they achieve accurate cost allocation?

An enterprise wants to optimize its AWS compute costs. They have steady-state EC2 workloads, highly variable containerized workloads on Fargate, and batch processing jobs that can be interrupted. Which TWO pricing models should they combine for maximum savings? (Select TWO)

An organization wants to allocate AWS costs to specific departments. They use multiple AWS accounts. How can they ensure that specific tags are applied to all newly created EC2 instances to enable cost allocation?

A company wants to purchase Compute Savings Plans to reduce costs. They have a multi-account structure with consolidated billing enabled. How can they ensure the Savings Plan discount is applied to the accounts with the highest usage first?

An organization wants to optimize costs for their EC2 fleet. They have a baseline of steady-state usage and occasional unpredictable spikes. Which TWO pricing models should they combine for the MOST cost-effective architecture? (Select TWO)

A company wants to implement a robust cost optimization and visibility strategy across their 100 AWS accounts. Which FOUR actions should they take? (Select FOUR)

An enterprise has 50 AWS accounts under AWS Organizations. They want to implement a chargeback model where each business unit (BU) pays for its own AWS usage. However, some resources like Transit Gateway and central databases are shared. How can the architect provide accurate cost visibility and chargeback capabilities?

A large enterprise has a predictable baseline of EC2 usage and a highly variable spike in usage during end-of-month processing. They want to optimize costs across their AWS Organization. They have multiple instance families in use (M5, C5, R5) across three regions. What is the MOST flexible and cost-effective commitment discount strategy?

A company has a massive data lake in Amazon S3. They use Amazon Athena for querying. Over time, query performance has degraded, and costs have skyrocketed. The data is currently stored in raw CSV format, partitioned by year. What is the MOST effective strategy to improve performance and reduce costs?

A company is running a large fleet of Amazon EC2 instances. They want to optimize costs without impacting performance. They have identified that many instances have predictable usage, but some workloads are fault-tolerant and can be interrupted. The company also has a significant amount of data transfer between Availability Zones. Which combination of strategies will maximize cost savings? (Select THREE)

A company has a complex AWS environment with hundreds of linked accounts under AWS Organizations. The CFO wants to allocate costs to specific business units (BUs). However, many resources are shared across BUs, such as Transit Gateways and central logging buckets. How can the Solutions Architect provide accurate cost allocation for both dedicated and shared resources?

An enterprise wants to allocate AWS costs to specific business units. They use a multi-account strategy. Some resources, like a central Transit Gateway, are shared. How can they accurately allocate the costs of shared resources to the business units that consume them?

A company has a predictable baseline of EC2 usage and highly variable spike usage. They want to maximize cost savings without risking capacity shortages during spikes. Which purchasing strategy should the architect recommend?

An organization uses AWS Organizations with consolidated billing. The central IT team wants to allocate costs back to individual business units based on their resource usage. However, many resources like EC2 instances and S3 buckets are shared across business units. What is the MOST effective strategy to achieve accurate cost allocation?

A company is using AWS Cost Explorer and notices a significant increase in data transfer costs. Upon investigation, they find that EC2 instances in a private subnet are downloading large amounts of data from Amazon S3 via a NAT Gateway. How can the architect reduce these data transfer costs to zero?