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CCA-500 Dumps

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Vendor: Cloudera

Certifications: CCAH

Exam Name: Cloudera Certified Administrator for Apache Hadoop (CCAH)

Exam Code: CCA-500

Total Questions: 60 Q&As

Last Updated: Feb 15, 2024

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CCA-500 Practice Questions and Answers Online

Questions 1

Each node in your Hadoop cluster, running YARN, has 64GB memory and 24 cores. Your yarn.site.xml

has the following configuration:

yarn.nodemanager.resource.memory-mb

32768

yarn.nodemanager.resource.cpu-vcores

12

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: yarn.scheduler.minimum-allocation-mb 2048

B. Modify yarn-sites.xml with the following property: yarn.scheduler.minimum-allocation-mb 4096

C. Modify yarn-site.xml with the following property: yarn.nodemanager.resource.cpu-vccores

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

Show Answer
Questions 2

During the execution of a MapReduce v2 (MRv2) job on YARN, where does the Mapper place the intermediate data of each Map Task?

A. The Mapper stores the intermediate data on the node running the Job's ApplicationMaster so that it is available to YARN ShuffleService before the data is presented to the Reducer

B. The Mapper stores the intermediate data in HDFS on the node where the Map tasks ran in the HDFS / usercache/and(user)/apache/application_and(appid) directory for the user who ran the job

C. The Mapper transfers the intermediate data immediately to the reducers as it is generated by the Map Task

D. YARN holds the intermediate data in the NodeManager's memory (a container) until it is transferred to the Reducer

E. The Mapper stores the intermediate data on the underlying filesystem of the local disk in the directories yarn.nodemanager.locak-DIFS

Show Answer
Questions 3

What two processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all six DataNodes. (Choose two)

A. You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes

B. You must modify the configuration files on each of the DataNodes machines

C. You don't need to restart any daemon, as they will pick up changes automatically

D. You must restart the NameNode daemon to apply the changes to the cluster

E. You must restart all six DatNode daemon to apply the changes to the cluster

Show Answer
Questions 4

You are configuring a server running HDFS, MapReduce version 2 (MRv2) on YARN running Linux. How must you format underlying file system of each DataNode?

A. They must be formatted as HDFS

B. They must be formatted as either ext3 or ext4

C. They may be formatted in any Linux file system

D. They must not be formatted - - HDFS will format the file system automatically

Show Answer
Questions 5

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?

(Choose two)

A. 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

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

C. The order of execution of job may vary

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

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

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

Show Answer More Questions

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