Cloudera CCA-470 : Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)

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Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH) Sample Questions:

1. Choose which best describe a Hadoop cluster's block size storage parameters once you set the HDFS default block size to 64MB?

A) The block size of files in the cluster will all be the exactly 64MB.
B) The block size of files in the duster will all at least be 64MB.
C) The block size of files in the cluster can be determined as the block is written.
D) The block size of files in the Cluster will all be multiples of 64M

2. On a cluster running MapReduce v1 (MRv1), a MapReduce job is given a directory of 10 plain text as its input directory. Each file is made up of 3 HDFS blocks. How many Mappers will run?

A) 1
B) We cannot say; the number of Mappers is determined by the developer
C) 10
D) 30

3. What additional capability does Ganglia provide to monitor a Hadoop?

A) Ability to monitor number of files in HDFS.
B) Ability to monitor free task slots.
C) Ability to monitor NameNode memory usage.
D) Ability to monitor processor utilization.
E) Ability to monitor the amount of free space on HDFS.

4. You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later,
you submit job B, Now job A and job B are running on the cluster at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)

A) When job B gets submitted, job A has to finish first, before job B can get scheduled.
B) When job A gets submitted, it consumes all the task slots.
C) When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.
D) When job A gets submitted, it doesn't consume all the task slots.

5. What's the relationship between JobTrackers and TaskTrackers?

A) Every node in the cluster runs both a JobTracker and a TaskTracker. The JobTrackers manage jobs, and the TaskTrackers are responsible for managing actual map and reduce tasks.
B) The TaskTrackers runs on a single master node and accepts MapReduce jobs from clients. A JobTracker runs on every slave node and is responsible for managing map and reduce tasks.
C) The JobTracker runs on a single master node, but forks a separate instance of itself for every client MapReduce job. A TaskTracker runs on every slave node and is responsible for managing actual map and reduce tasks.
D) The JobTracker runs on a single master node and accepts MapReduce jobs from clients. A TaskTracker runs on every slave node and is responsible for managing actual map and reduce tasks.

Solutions: