Cloudera CCA-470 Actual Free Exam Questions & Community Discussion

Exam Code/Number: CCA-470
Exam Name/Title: Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)
Certification Provider: Cloudera
Corresponding Certification: CCAH

Exam Questions: 87
Updated On: Jun 01, 2026

Question #28

Identify which two daemons typically run each slave node in a Hadoop cluster running MapReduce v1 (MRv1)

A. NodeManager

B. NameNode

C. JobTracker

D. Secondary NameNode

E. DataNode

F. TaskTracker

Discussion 0

Correct Answer: E,F Vote an answer

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Question #29

What determines the number of Reduces that run a given MapReduce job on a cluster running MapReduce v1 (MRv1)?

A. It is set and fixed by the cluster administrator in mapred-site.xml. The number set always run for any submitted job.

B. It is set by the developer.

C. It is set by the Hadoop framework and is based on the number of InputSplits of the job.

D. It is set by the JobTracker based on the amount of intermediate data.

Discussion 0

Correct Answer: B Vote an answer

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Question #30

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

A. The developer sets the number of task attempts on job submission.

B. There are always at most as many tasks attempts as there are tasks.

C. There are always exactly as many task attempts as there are tasks.

D. There are always at least as many task attempts as there are tasks.

Discussion 0

Correct Answer: C Vote an answer

Question #31

What information is stored on disk on the NameNode? (Choose 4)

A. An edit log of changes that have been made since the last snapshot compaction by the Secondary NameNode.

B. The directory structure of the files in HDFS.

C. An edit log of changes that have been made since the last backup of the NameNode.

D. The status of the heartbeats of each DataNode.

E. File permissions of the files in HDFS.

F. A catalog of DataNodes and the blocks that are stored on them.

G. Names of the files in HDFS.

Discussion 0

Correct Answer: A,B,F,G Vote an answer

Question #32

You observe that the number of spilled records from map tasks for exceeds the number of map output records. You child heap size is 1 GB and your io.sort.mb value is set to 100MB. How would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?

A. Decrease the io.sort.mb value below 100M

B. Increase the IO.sort.mb as high you can, as close to 1GB as possible.

C. For 1GB child heap size an io.sort.mb of 128MB will always maximum memory to disk I/O.

D. Tune io.sort.mb value until you observe that the number of spilled records equals (or is as close to equals) the number of map output records.

Discussion 0

Correct Answer: D Vote an answer

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Question #33

What action occurs automatically on a cluster when a DataNode is marked as dead?

A. The next time a client submits job that requires blocks from the dead DataNode, the JobTracker receives no heart beats from the DataNode. The JobTracker tells the NameNode that the DataNode is dead, which triggers block re-replication on the cluster.

B. The replication factor of the files which had blocks stored on the dead DataNode is temporarily reduced, until the dead DataNode is recovered and returned to the cluster.

C. The NameNode forces re-replication of all the blocks which were stored on the dead DataNode.

D. The NameNode informs the client which write the blocks that are no longer available; the client then re-writes the blocks to a different DataNode.

Discussion 0

Correct Answer: C Vote an answer

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Question #34

You have a cluster running with the Fair in Scheduler enabled. There are currently no jobs running on the cluster, and you submit a job A, so that only job A is running on the cluster. A while later,
you submit job B, Now job A and job B are running on the cluster at the same time.
Which of the following describes how the Fair Scheduler operates? (Choose 2)

A. When job A gets submitted, it consumes all the task slots.

B. When job B gets submitted, job A has to finish first, before job B can get scheduled.

C. When job A gets submitted, it doesn't consume all the task slots.

D. When job B gets submitted, it will get assigned tasks, while job A continues to run with fewer tasks.

Discussion 0

Correct Answer: A,B Vote an answer

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Question #35

You are running a Hadoop cluster with NameNode on host mynamenode, a secondary NameNode on host mysecondary and DataNodes.
Which best describes how you determine when the last checkpoint happened?

A. Execute hdfs dfsadmin -report on the command line in and look at the Last Checkpoint information.

B. Execute hdfs dfsadmin -saveNameSpace on the command line which returns to you the last checkpoint value in fstime file.

C. Connect to the web UI of the Secondary NameNode (http://mysecondarynamenode:50090) and look at the "Last Checkpoint" information

D. Connect to the web UI of the NameNode (http://mynamenode:50070/) and look at the "Last Checkpoint" information

Discussion 0

Correct Answer: C Vote an answer

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Question #36

In a cluster configured with HDFS High Availability (HA) but NOT HDFS federation, each map task run:

A. In the same Java Virtual Machine as the TaskTracker

B. In the same Java Virtual Machine as the JobTracker.

C. In the same Java Virtual Machine as the DataNode.

D. In its own Java Virtual Machine.

Discussion 0

Correct Answer: D Vote an answer

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