Cloudera Certified Administrator for Apache Hadoop (CCAH): CCA-500

Which is the default scheduler in YARN?

A. YARN doesn't configure a default scheduler, you must first assign an appropriate scheduler class in yarn-site.xml

B. Capacity Scheduler

C. Fair Scheduler

D. FIFO Scheduler

Which scheduler would you deploy to ensure that your cluster allows short jobs to finish within a reasonable time without starting long-running jobs?

A. Complexity Fair Scheduler (CFS)

B. Capacity Scheduler

C. Fair Scheduler

D. FIFO Scheduler

A user comes to you, complaining that when she attempts to submit a Hadoop job, it fails. There is a Directory in HDFS named /data/input. The Jar is named j.jar, and the driver class is named DriverClass.

She runs the command:

Hadoop jar j.jar DriverClass /data/input/data/output

The error message returned includes the line: PriviligedActionException as:training (auth:SIMPLE) cause:org.apache.hadoop.mapreduce.lib.input.invalidInputException: Input path does not exist: file:/data/input

What is the cause of the error?

A. The user is not authorized to run the job on the cluster

B. The output directory already exists

C. The name of the driver has been spelled incorrectly on the command line

D. The directory name is misspelled in HDFS

E. The Hadoop configuration files on the client do not point to the cluster