CCA-500 Cloudera Exam Questions and Free Practice Test

Question 13

Table schemas in Hive are:

A. Stored as metadata on the NameNode

B. Stored along with the data in HDFS

C. Stored in the Metadata

D. Stored in ZooKeeper

Correct Answer:B

Question 14

You’re upgrading a Hadoop cluster from HDFS and MapReduce version 1 (MRv1) to one running HDFS and MapReduce version 2 (MRv2) on YARN. You want to set and enforce version 1 (MRv1) to one running HDFS and MapReduce version 2 (MRv2) on YARN. You want to set and enforce a block size of 128MB for all new files written to the cluster after upgrade. What should you do?

A. You cannot enforce this, since client code can always override this value

B. Set dfs.block.size to 128M on all the worker nodes, on all client machines, and on the NameNode, and set the parameter to final

C. Set dfs.block.size to 128 M on all the worker nodes and client machines, and set the parameter to fina

D. You do not need to set this value on the NameNode

E. Set dfs.block.size to 134217728 on all the worker nodes, on all client machines, and on the NameNode, and set the parameter to final

F. Set dfs.block.size to 134217728 on all the worker nodes and client machines, and set the parameter to fina

G. You do not need to set this value on the NameNode

Correct Answer:C

Question 15

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

A. Execute hdfs namenode –report on the command line 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://mysecondary: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

Correct Answer:C
Reference:https://www.inkling.com/read/hadoop-definitive-guide-tom-white-3rd/chapter- 10/hdfs

Question 16

Assume you have a file named foo.txt in your local directory. You issue the following three commands:
Hadoop fs –mkdir input
Hadoop fs –put foo.txt input/foo.txt
Hadoop fs –put foo.txt input
What happens when you issue the third command?

A. The write succeeds, overwriting foo.txt in HDFS with no warning

B. The file is uploaded and stored as a plain file named input

C. You get a warning that foo.txt is being overwritten

D. You get an error message telling you that foo.txt already exists, and asking you if you would like to overwrite it.

E. You get a error message telling you that foo.txt already exist

F. The file is not written to HDFS

G. You get an error message telling you that input is not a directory

H. The write silently fails

Correct Answer:CE

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