Discover the key factors impacting costs in the AWS Cloud for the AWS Certified Cloud Practitioner CLF-C02 exam. Learn about data transfer out and compute resource usage to optimize your AWS expenses.
Table of Contents
Question
Which factors impact costs in the AWS Cloud? (Select TWO.)
A. Number of unused AWS Lambda functions
B. Number of Amazon S3 buckets configured
C. Data transfer in without acceleration
D. Data transfer out without acceleration
E. Compute resources that are currently in use
Answer
D. Data transfer out without acceleration
E. Compute resources that are currently in use
Explanation
Data transfer out without acceleration and compute resources that are currently in use are factors that impact costs in the AWS Cloud.
D. Data Transfer Out Without Acceleration
- AWS charges for data transfer out of its services, such as transferring data from AWS to the internet or between regions. This is a significant cost factor because inbound data transfer is generally free, while outbound data incurs charges based on volume and destination location.
- Example: If you host a website on Amazon S3 or EC2, the data sent to users (outbound traffic) contributes to your costs.
E. Compute Resources That Are Currently in Use
- Compute resources, such as Amazon EC2 instances, AWS Lambda functions, or container services like ECS and EKS, incur costs based on their usage. Charges are determined by factors like instance type, duration of use, and additional features (e.g., storage or networking).
- Example: Running an EC2 instance continuously will result in higher costs compared to stopping it when not in use.
Incorrect Options
A. Number of Unused AWS Lambda Functions
AWS does not charge for unused Lambda functions. Costs are only incurred when Lambda functions are invoked (based on execution time and memory used).
B. Number of Amazon S3 Buckets Configured
The number of S3 buckets does not directly impact costs. Instead, charges depend on the amount of data stored, requests made (e.g., GET/PUT), and data transfer.
C. Data Transfer In Without Acceleration
Data transfer into AWS services is typically free, making this option irrelevant for cost considerations.
Key Takeaway for the Exam
Understanding AWS pricing models is crucial for passing the CLF-C02 exam. Focus on these three primary cost drivers:
- Compute usage
- Storage usage
- Outbound data transfer
AWS provides tools like the AWS Pricing Calculator and AWS Cost Explorer to help estimate and optimize costs effectively.
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