AWS Certified Machine Learning – Specialty — Question 71

A Machine Learning Specialist is planning to create a long-running Amazon EMR cluster. The EMR cluster will have 1 master node, 10 core nodes, and 20 task nodes. To save on costs, the Specialist will use Spot Instances in the EMR cluster.
Which nodes should the Specialist launch on Spot Instances?

Answer options

• A. Master node
• B. Any of the core nodes
• C. Any of the task nodes
• D. Both core and task nodes

Correct answer: C

Explanation

The correct answer is C because task nodes are designed for ephemeral processing and can be interrupted without affecting the overall cluster performance. In contrast, the master node is crucial for controlling the cluster and should not be on Spot Instances, while core nodes are responsible for data storage and processing, making them less suitable for Spot Instances as well.