Cloudera CCA-500 - Cloudera Certified Administrator for Apache Hadoop (CCAH) Exam
Page: 3 / 12
Total 60 questions
Question #11 (Topic: )
On a cluster running MapReduce v2 (MRv2) on YARN, a MapReduce job is given a
directory of 10 plain text files as its input directory. Each file is made up of 3 HDFS blocks.
How many Mappers will run?
directory of 10 plain text files as its input directory. Each file is made up of 3 HDFS blocks.
How many Mappers will run?
A. We cannot say; the number of Mappers is determined by the ResourceManager
B. We cannot say; the number of Mappers is determined by the developer
C. 30
D. 3
E. 10
F. We cannot say; the number of mappers is determined by theApplicationMaster
Answer: E
Question #12 (Topic: )
Given:
[Cloudera-CCA-500-6.8/Cloudera-CCA-500-7_2.png]
You want to clean up thislist by removing jobs where the State is KILLED. What command
you enter?
[Cloudera-CCA-500-6.8/Cloudera-CCA-500-7_2.png]
You want to clean up thislist by removing jobs where the State is KILLED. What command
you enter?
A. Yarn application –refreshJobHistory
B. Yarn application –kill application_1374638600275_0109
C. Yarn rmadmin –refreshQueue
D. Yarn rmadmin –kill application_1374638600275_0109
Answer: B
Question #13 (Topic: )
You are running a Hadoop cluster with a NameNode on host mynamenode. What are two
ways to determine available HDFS space in your cluster?
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
Answer: B
Question #14 (Topic: )
In CDH4 and later, which file contains a serialized form of all the directory andfiles inodes
in the filesystem, giving the NameNode a persistent checkpoint of the filesystem metadata?
in the filesystem, giving the NameNode a persistent checkpoint of the filesystem metadata?
A. fstime
B. VERSION
C. Fsimage_N (where N reflects transactions up to transaction ID N)
D. Edits_N-M (where N-M transactions between transaction ID Nand transaction ID N)
Answer: C
Question #15 (Topic: )
Assuming youre not running HDFS Federation, what is the maximum number of
NameNode daemons you should run on your clusterin order to avoid a split-brain
scenario with your NameNode when running HDFS High Availability (HA) using Quorum-
based storage?
NameNode daemons you should run on your clusterin order to avoid a split-brain
scenario with your NameNode when running HDFS High Availability (HA) using Quorum-
based storage?
A. Two active NameNodes and two Standby NameNodes
B. One active NameNode and one Standby NameNode
C. Two active NameNodes and on Standby NameNode
D. Unlimited. HDFS High Availability (HA) is designed to overcome limitations on the number of NameNodes you can deploy
Answer: B
