Databricks Certified Associate Developer for Apache Spark — Question 156

Which of the following describes executors?

Answer options

• A. Executors are the communication pathways from the driver node to the worker nodes.
• B. Executors are the most granular level of execution in the Spark execution hierarchy.
• C. Executors always have a one-to-one relationship with worker nodes.
• D. Executors are synonymous with worker nodes.
• E. Executors are processing engine instances for performing data computations which run on a worker node.

Correct answer: E

Explanation

The correct answer is E because executors are indeed processing engine instances that execute tasks on worker nodes. Option A is incorrect as it describes the role of the driver node, while B misrepresents the hierarchy since executors are not the most granular level. Option C is wrong because multiple executors can run on a single worker node, and D is inaccurate as executors are not synonymous with worker nodes but rather operate on them.