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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. You set up the Hadoop cluster using NameNode Federation. One NameNode manages the/users namespace and one NameNode manages the/data namespace. What happens when client tries to write a file to/reports/myreport.txt?

A) The client throws an exception.
B) The file successfully writes to /report/myreport.txt. The metadata for the file is managed by the first NameNode to which the client connects.
C) The file writes fails silently; no file is written, no error is reported.
D) The file successfully writes to /users/reports/myreports/myreport.txt.

2. How many mappers required for a map reduce, job determine on a cluster running map reduce V1 (MRv1)?

A) The number of mappers is calculated by namenode based on the number of HDFS blocks in the files
B) the jobtracker chooses the number based on no of available nodes
C) The number mappers is equal to no of input splits calculated by client submitting
D) the developer specifies the number in the job configuration

3. What occurs when you run a hadoop job specifying output directory for job output which already exists in HDFS?

A) the job will run successfully. Output from the reducers will override the contents of existing directory
B) the job will run successfully output from the reducers will be placed in a directory called job output -1
C) an error will occur after the mappers have completed but before any reducers begin to run because the output path must not exist during the shuffle and sort.
D) An error will occur immediately because the output directory must not already exist.

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

5. Compare the hardware requirements of the NameNode with that of the DataNodes in a Hadoop cluster running MapReduce v1 (MRv1):

A) The NameNode and DataNodes should the same hardware configuration.
B) The NameNode requires more memory and no disk drives.
C) The NameNode requires less memory and less disk capacity than the DataNodes.
D) The NameNode requires more memory but less disk capacity.
E) The NameNode requires more memory and requires greater disk capacity than the DataNodes.

Solutions: