A company's development and test environments run around the clock, but its engineers use them only during weekday working hours.
The finance lead wants to cut the monthly AWS bill by automating how these environments are created and run, rather than relying on manual reviews.
Which TWO actions achieve this? (Choose two.)
Choose two answers.
AA. Use a schedule to stop development and test instances automatically outside working hours.
BB. Increase the size of every instance so that engineers need to tune performance less often.
CC. Turn off AWS CloudTrail in every account to save on log storage.
DD. Create test environments from AWS CloudFormation templates and delete each stack when testing ends.
EE. Buy three-year Reserved Instances for test servers that run only during the working day.
Show the answer and explanation
Answers: A, D
A. Right: Correct. An automated schedule stops instances outside working hours and starts them again in the morning. The company stops paying for compute nobody is using, with no manual effort each day.
B. Wrong: Incorrect. Larger instances cost more per hour, so this raises the bill. Tuning performance less often does not reduce cost.
C. Wrong: Incorrect. CloudTrail records API activity for auditing and security, and its storage cost is small. Turning it off to save money removes visibility for very little saving.
D. Right: Correct. CloudFormation templates build an environment the same way each time, and deleting the stack when testing ends stops charges for resources nobody is using.
E. Wrong: Incorrect. A Reserved Instance is billed at its discounted rate for every hour of its term, whether or not it runs. Committing for three years to servers that run only in working hours pays for idle time.
Explanation
Scheduling stops and starts non-production instances automatically, and CloudFormation lets teams create and remove environments on demand, so charges stop when the work stops. Larger instances and disabling audit logs raise cost or remove visibility, and reserved capacity that sits idle wastes money.
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