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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

1. Which MapReduce daemon instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v1 (MRv1)?

A) ResourceManager
B) NodeManager
C) NameNode
D) TaskTracker
E) DataNode
F) JobTracker
G) ApplicationMaster

2. You set the value of dfs.block.size to 64MB in hdfs-site.xml on a client machine, but you set the same property to 128MB on your clusters name node. What happens when the client writes a file to HDFS?

A) A block size of 128MB will be used
B) The file will be written successfully with a block size of 64MB but client attempting to read the file will fail because the namenode believes the blocks to be 128MB in size
C) A block size of 64MB will be used
D) An execution will be thrown when the client attempts to write the file, because the values are different.

3. You configure your hadoop development cluster with both mapreduce frameworks, mapreduceV1 (MRv1) and mapreduce v2 (MRv2/YARN). You plan to run only one set of mapreduce daemons at a time in this development environment (running both simultaneously results in an unsuitable cluster but configure in both moving between them is fine). Which two mapreduce (capitation) daemons do you need to configure to run on your masternodes?

A) Nodemanager
B) Journalnode
C) Applicationmaster
D) Containermanager
E) Jobtracker
F) Resourcemanager

4. The failure of which daemon makes HDFS unavailable on a cluster running MapReduce v1 (MRv1)?

A) Secondary NameNode
B) Application Manager
C) NameNode
D) Node Manager
E) DataNode
F) Resource Manager

5. What metadata is stored on a DataNode when a block is written to it?

A) Node location of each block belonging to the same namespace.
B) None. Only the block itself is written.
C) Checksums for the data in the block, as a separate file.
D) Information on the file's location in HDFS.

Solutions: