Cloudera CCA-410 Actual Tests : Cloudera Certified Administrator for Apache Hadoop CDH4

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Cloudera CCA-410 Exam Syllabus Topics:

Cloudera Certified Administrator for Apache Hadoop CDH4 Sample Questions:

Question 1

For a MapReduce job, on a cluster running MapReduce v1 (MRv1), what's the relationship between tasks and task templates?

A. There are always exactly as many task attempts as there are tasks.
B. The developer sets the number of task attempts on job submission.
C. There are always at most as many tasks attempts as there are tasks.
D. There are always at least as many task attempts as there are tasks.

Question 2

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

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

Question 3

Your Hadoop cluster has 12 slave nodes, a block size set to 64MB, and a replication factor of three.
Choose which best describes how the Hadoop Framework distributes block writes into HDFS from a Reducer outputting a 150MB file?

A. The slave node on which the Reducer runs gets the first copy of every block written. Other block replicas will be placed on other nodes.
B. Reducers don't write blocks into HDFS
C. The Reducer will generate nine blocks and write them randomly to nodes throughout the cluster.
D. The Reducer will generate twelve blocks and write them to slave nodes nearest the node on which the Reducer runs.

Question 4

Your running a hadoop cluster with a name node on the host mynamenode.
What are two ways you can determine available HDFS space in your cluster?

A. Connect to http://mynamenode:50070/and locate the dfs remaining value
B. Run hadoop fs -du / and locate the dfs remaining value
C. Run hadoop DFSAdmin -spaceQuota and subtract DFS used % from configured capacity
D. Run hadoop dfsadmin - report and locate the DFS remaming value

Question 5

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

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

Solutions: