CCA-500 Cloudera Exam Questions and Free Practice Test

Question 7

Cluster Summary:
45 files and directories, 12 blocks = 57 total. Heap size is 15.31 MB/193.38MB(7%)
CCA-500 dumps exhibit
Refer to the above screenshot.
You configure a Hadoop cluster with seven DataNodes and on of your monitoring UIs displays the details shown in the exhibit.
What does the this tell you?

A. The DataNode JVM on one host is not active

B. Because your under-replicated blocks count matches the Live Nodes, one node is dead, and your DFS Used % equals 0%, you can’t be certain that your cluster has all the data you’ve written it.

C. Your cluster has lost all HDFS data which had bocks stored on the dead DatNode

D. The HDFS cluster is in safe mode

Correct Answer:A

Question 8

Which is the default scheduler in YARN?

A. YARN doesn’t configure a default scheduler, you must first assign an appropriate scheduler class in yarn-site.xml

B. Capacity Scheduler

C. Fair Scheduler

D. FIFO Scheduler

Correct Answer:B
Reference:http://hadoop.apache.org/docs/r2.4.1/hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html

Question 9

You are running a Hadoop cluster with a NameNode on host mynamenode. What are two ways to determine available HDFS space in your cluster?

A. Run hdfs fs –du / and locate the DFS Remaining value

B. Run hdfs dfsadmin –report and locate the DFS Remaining value

C. Run hdfs dfs / and subtract NDFS Used from configured Capacity

D. Connect to http://mynamenode:50070/dfshealth.jsp and locate the DFS remaining value

Correct Answer:B

Question 10

You have a cluster running with the fair 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. How will the Fair Scheduler handle these two jobs?(Choose two)

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

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

C. When Job A gets submitted, it doesn’t consumes all the task slots.

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

Correct Answer:B

Question 11

You want to node to only swap Hadoop daemon data from RAM to disk when absolutely necessary. What should you do?

A. Delete the /dev/vmswap file on the node

B. Delete the /etc/swap file on the node

C. Set the ram.swap parameter to 0 in core-site.xml

D. Set vm.swapfile file on the node

E. Delete the /swapfile file on the node

Correct Answer:D

Question 12

You are working on a project where you need to chain together MapReduce, Pig jobs. You also need the ability to use forks, decision points, and path joins. Which ecosystem project should you use to perform these actions?

A. Oozie

B. ZooKeeper

C. HBase

D. Sqoop

E. HUE

Correct Answer:A

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