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

1. 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 the amount of free space on HDFS.
D) Ability to monitor processor utilization.
E) Ability to monitor NameNode memory usage.

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

3. You are planning a Hadoop duster, and you expect to be receiving just under 1TB of data per week which will be stored on the cluster, using Hadoop's default replication. You decide that your slave nodes will be configured with 4 x 1TB disks.
Calculate how many slave nodes you need to deploy at a minimum to store one year's worth of data.

A) 100 slave nodes
B) 10 slave nodes
C) 100 slave nodes
D) 50 slave nodes

4. Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space allocated HDFS storage. Assuming Hadoop's default configuration, how much data will you be able to store?

A) Approximately 10TB
B) Approximately 100TB
C) Approximately 25TB
D) Approximately 33 TB

5. When determining the most appropriate ratio of processor cores to disk drives for a Hadoop cluster, what are the considerations?

A) Disk drives per machine, nothing else matters.
B) Disk drives per core without consideration to workload types
C) Disk drives per core and workload types
D) Processor core counts and workload type, the ratio doesn't matter
E) Processors and disk drives per machine, the workload doesn't matter

Solutions: