Databricks Certified Associate Developer for Apache Spark — Question 125

Which of the following describes a partition?

Answer options

• A. A partition is the amount of data that fits in a single executor.
• B. A partition is an automatically-sized segment of data that is used to create efficient logical plans.
• C. A partition is the amount of data that fits on a single worker node.
• D. A partition is a portion of a Spark application that is made up of similar jobs.
• E. A partition is a collection of rows of data that fit on a single machine in a cluster.

Correct answer: E

Explanation

The correct answer, E, accurately defines a partition as a collection of rows that reside on a single machine within a cluster. Option A is incorrect because it refers to executors, which are not the same as partitions. Options B, C, and D mischaracterize the role and definition of a partition in the context of Spark applications.