Apache Spark Certification Practice Test

Question: 1 / 400

What command is used to start Spark with a local master using 2 cores?

spark-shell -master local[2]

The command to start Spark with a local master using 2 cores is correctly represented by the syntax in the first choice. The use of `-master` indicates that you are specifying the master configuration for Spark, which can take various forms, including local mode. In this instance, `local[2]` specifies that the Spark application should run locally using 2 cores. This is essential for testing or running small workloads without setting up a full cluster.

Using `-master` leads to a clear and accurate setting for the local execution environment in Spark, ensuring that the application can leverage the specified number of CPU cores effectively. It is a common practice to use this parameter in many Spark commands, and it clearly delineates the intention of running the Spark shell with local resources.

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spark-shell --master local[2]

spark-shell local[2]

spark-shell -local[2]

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