A data science team needs to run a massive data processing job that will take approximately 4 hours to complete. The job can be interrupted and resumed without losing progress. Which Amazon EC2 pricing option is the MOST cost-effective for this workload?

Answer options:

On-Demand Instances

Spot Instances

Reserved Instances

Dedicated Hosts

How to approach this question

Match 'can be interrupted' and 'most cost-effective' with Spot Instances.

Full Answer

B.Spot Instances✓ Correct

Amazon EC2 Spot Instances let you take advantage of unused EC2 capacity in the AWS cloud. Spot Instances are available at up to a 90% discount compared to On-Demand prices. Because Spot Instances can be interrupted by AWS with a 2-minute warning, they are ideal for fault-tolerant, flexible workloads.

Common mistakes

Choosing On-Demand because 4 hours seems short. Spot is always cheaper if the workload can handle interruptions.

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