최신 CCA-500 무료덤프 - Cloudera Certified Administrator for Apache Hadoop (CCAH)

문제1

You have a cluster running with a FIFO scheduler enabled. You submit a large job A to the cluster, which you expect to
run for one hour. Then, you submit job B to the cluster, which you expect to run a couple of minutes only.
You submit both jobs with the same priority.
Which two best describes how FIFO Scheduler arbitrates the cluster resources for job and its tasks?

A. The FIFO Scheduler will give, on average, and equal share of the cluster resources over the job lifecycle

B. Tasks are scheduled on the order of their job submission

C. Given job A and submitted in that order, all tasks from job A are guaranteed to finish before all tasks from job B

D. Because there is a more than a single job on the cluster, the FIFO Scheduler will enforce a limit on the percentage of
resources allocated to a particular job at any given time

E. The order of execution of job may vary

F. The FIFO Scheduler will pass an exception back to the client when Job B is submitted, since all slots on the cluster
are use

정답: A,D

문제2

Which YARN daemon or service negotiations map and reduce Containers from the Scheduler, tracking their status and
monitoring progress?

A. ApplicationMaster

B. NodeManager

C. ApplicationManager

D. ResourceManager

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제3

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

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

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

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제4

Each node in your Hadoop cluster, running YARN, has 64GB memory and 24 cores.
Your yarn.site.xml has the following configuration:
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>32768</value>
</property>
<property>
<name>yarn.nodemanager.resource.cpu-vcores</name>
<value>12</value>
</property>
You want YARN to launch no more than 16 containers per node. What should you do?

A. Modify yarn-site.xml with the following property:
<name>yarn.scheduler.minimum-allocation-mb</name>
<value>2048</value>

B. Modify yarn-site.xml with the following property:
<name>yarn.nodemanager.resource.cpu-vccores</name>

C. No action is needed: YARN's dynamic resource allocation automatically optimizes the node memory and cores

D. Modify yarn-sites.xml with the following property:
<name>yarn.scheduler.minimum-allocation-mb</name>
<value>4096</value>

정답: B

문제5

In CDH4 and later, which file contains a serialized form of all the directory and files inodes in the filesystem, giving the
NameNode a persistent checkpoint of the filesystem metadata?

A. fstime

B. Edits_N-M (where N-M transactions between transaction ID N and transaction ID N)

C. VERSION

D. Fsimage_N (where N reflects transactions up to transaction ID N)

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제6

Assuming you're not running HDFS Federation, what is the maximum number of NameNode daemons you should run
on your cluster in order to avoid a "split-brain" scenario with your NameNode when running HDFS High Availability
(HA) using Quorum-based storage?

A. One active NameNode and one Standby NameNode

B. Two active NameNodes and on Standby NameNode

C. Two active NameNodes and two Standby NameNodes

D. Unlimited. HDFS High Availability (HA) is designed to overcome limitations on the number of NameNodes you can deploy

정답: A

최신 CCA-500 무료덤프 - Cloudera Certified Administrator for Apache Hadoop (CCAH)

우리와 연락하기

유용한 링크

최신 업데이트