CCA-505試験無料問題集（45題）「Cloudera Certified Administrator for Apache Hadoop (CCAH) CDH5 Upgrade 認定」

出題：1

You decide to create a cluster which runs HDFS in High Availability mode with automatic failover, using Quorum-based Storage. What is the purpose of ZooKeeper in such a configuration?

A. It only keeps track of which NameNode is Active at any given time

B. It both keeps track of which NameNode is Active at any given time, and manages the Edits file, which is a log of changes to the HDFS filesystem

C. Clients connect to ZoneKeeper to determine which NameNode is Active

D. It monitors an NFS mount point and reports if the mount point disappears

E. It manages the Edits file, which is a log changes to the HDFS filesystem.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：2

You are planning a Hadoop cluster and considering implementing 10 Gigabit Ethernet as the network fabric. Which workloads benefit the most from a faster network fabric?

A. When your workload consists of processor-intensive tasks

B. When your workload generates a large amount of output data, significantly larger than amount of intermediate data

C. When your workload generates a large amount of intermediate data, on the order of the input data itself

D. When workload consumers a large amount of input data, relative to the entire capacity of HDFS

正解：C 解答を投票する

出題：3

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 that third command?

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

B. You get a error message telling you that foo.txt already exists. The file is not written to HDFS

C. The write silently fails

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

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

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

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

正解：B 解答を投票する

出題：4

Which three basic configuration parameters must you set to migrate your cluster from MapReduce1 (MRv1) to MapReduce v2 (MRv2)?

A. Configure the ResourceManager hostname and enable node services on YARN by
setting the following property in yarn-site.xml:
<name>yarn.resourcemanager.hostname</name>
<value>your_responseManager_hostname</value>

B. Configure the NodeManager to enable MapReduce services on YARN by adding
following property in yarn-site.xml:
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>

C. Configure MapReduce as a framework running on YARN by setting the following
property in mapred-site.xml:
<name>mapreduce.framework.name</name>
<value>yarn</value>

D. Configure the NodeManager hostname and enable services on YARN by setting the
following property in yarn-site.xml:
<name>yarn.nodemanager.hostname</name>
<value>your_nodeManager_hostname</value>

E. Configure the number of map tasks per job on YARN by setting the following property in
mapred-site.xml:
<name>mapreduce.job.maps</name>
<value>2</value>

F. Configure a default scheduler to run on YARN by setting the following property in
sapred-site.xml:
<name>mapreduce.jobtracker.taskScheduler</name>
<value>org.apache.hadoop.mapred.JobQueueTaskScheduler</value>

正解：A,D,E 解答を投票する

出題：5

You are configuring your cluster to run HDFS and MapReduce v2 (MRv2) on YARN. Which daemons need to be installed on your clusters master nodes? (Choose Two)

A. JobTracker

B. ResourceManager

C. NameNode

D. TaskTracker

E. HMaster

F. DataNode

正解：B,C 解答を投票する

CCA-505試験無料問題集「Cloudera Certified Administrator for Apache Hadoop (CCAH) CDH5 Upgrade 認定」