A company has temporary workload that is also variable. The company needs to use Amazon EC2 instances for the workload. The EC2 instances need to handle short bursts of work that cannot stop before fi

Question

Options

• ASpot Instances
• BOn-Demand Instances
• CSavings Plan
• DReserved Instances

• B
  95% (19)
• C
  5% (1)

Explanation

On-Demand Instances are the right choice here because they allow you to pay for compute capacity by the hour or second with no long-term commitments, making them ideal for temporary, variable workloads that must run to completion without interruption.

Why the others are wrong:

• Spot Instances (A) are the cheapest option but can be interrupted by AWS with just 2 minutes' notice when capacity is needed elsewhere - this is a dealbreaker for work that "cannot stop before finishing."
• Savings Plans (C) and Reserved Instances (D) both require 1- or 3-year commitments, making them unsuitable for temporary workloads where you'd be paying for capacity you no longer need.

Memory Tip: Think of the key phrase "cannot stop before finishing" as your signal to eliminate Spot Instances immediately. Then, since the workload is temporary (not long-term), you eliminate Reserved Instances and Savings Plans. What's left? On-Demand - flexible, reliable, and no commitments required. The trade-off is cost, but reliability wins when the job must complete.

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