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Q17. Select correct statement regarding an RDD

A. They are immutable

B. We can persist RDD on Disk or in memory

C. RDD is a fault tolerant

D. Per application there will be only one RDD

E. Once RDD destroyed, it can not be re-created because of node failure in a cluster

 

Ans : A,B,C

Exp : Spark RDD is a primary abstract of Spark application, which can be created during application any time. Once, RDD created it can not be altered.

However, you can create another RDD, using one RDD. To improve the performance RDDs can be persisted in memory as well as on Disk. RDDs are fault

tolerant an they manages lineage graph how they are created. Hence, can be easily re-created if node fails on which it is created.

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