AWS Certified SysOps Administrator – Associate — Question 24

A company is running distributed computing software to manage a fleet of 20 Amazon EC2 instances for calculations. The fleet includes 2 control nodes and 18 task nodes to run the calculations. Control nodes can automatically start the task nodes.
Currently, all the nodes run on demand. The control nodes must be available 24 hours a day, 7 days a week. The task nodes run for 4 hours each day. A SysOps administrator needs to optimize the cost of this solution.
Which combination of actions will meet these requirements? (Choose two.)

Answer options

Correct answer: A, E

Explanation

The correct answer, A, is suitable because purchasing EC2 Instance Savings Plans for the control nodes ensures cost savings for resources that need to be available 24/7. Option E is also correct as using Spot Instances for the task nodes can significantly reduce costs, given they only run for 4 hours a day. Options B, C, and D are not optimal; Dedicated Hosts may not provide cost benefits, Reserved Instances for task nodes aren't needed since they run less frequently, and using Spot Instances for control nodes could risk availability.