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Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. You have a cluster running 32 slave nodes and 3 master nodes running mapreduce V1 (MRv1). You execute the command:
$ hadoop fsck /
What four cluster conditions running this command will return to you?

A) The current state of the file system returned from scanning individual blocks on each datanode
B) Number of dead datanodes
C) Configure capacity of your cluster
D) Number of datanodes
E) the current state of the file system according to the namenode
F) the location for every block
G) Blocks replicated improperly or that don't satisfy your cluster enhancement policy (e. g. , too many blocks replicated on the same node)
H) Under-replicated blocks

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

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

3. Identify the daemon that performs checkpoint operations of the namespace state in a cluster configured with HDFS High Availability (HA) using Quorum based-storage?

A) BackupNode
B) NodeManeger
C) JournalNode
D) Standby NameNode
E) CheckpointNode
F) Secondary NameNode
G) NameNode

4. Your company stores user profile records in an OLTP database. You want to join these records with webserver logs. You have already ingested into the hadoop file system. What is the best way to obtain and ingest these user records?

A) Ingest with Pig's Load Command
B) Ingest with hadoop streaming
C) Ingest with flume agents
D) Ingest using the HDFS put command
E) Ingest with SQL import
F) Ingest using hives LOAD DATA command

5. 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 25TB
C) Approximately 100TB
D) Approximately 33 TB

Solutions: