A data engineering team is using Amazon EMR for big data processing. The clusters are transient; they spin up, process data from S3, and terminate. To optimize costs, they want to use Spot Instances. Which node type should they run on Spot Instances to minimize the risk of job failure?

Answer options:

Master node

Core nodes

Task nodes

All node types

How to approach this question

Understand the roles of EMR node types.

Full Answer

C.Task nodes✓ Correct

In Amazon EMR, Task nodes only add compute power and do not store data in HDFS. If a Spot Instance running a Task node is reclaimed, the job is simply reassigned, making them ideal for Spot pricing.

Common mistakes

Putting Core nodes on Spot, which risks HDFS data loss.

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