A customer’s nightly EMR job processes a single 2-TB data file stored on Amazon Simple Storage Service
(S3). The EMR job runs on two On-Demand core nodes and three On-Demand task nodes. Which of the
following may help reduce the EMR job completion time?
Choose 2 answers
Use three Spot Instances rather than three On-Demand instances for the task nodes.
Change the input split size in the MapReduce job configuration.
Use a bootstrap action to present the S3 bucket as a local filesystem.
Launch the core nodes and task nodes within an Amazon Virtual Cloud.
Adjust the number of simultaneous mapper tasks.
Enable termination protection for the job flow.