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CCA-500 Sample Questions Answers

Questions 4

You suspect that your NameNode is incorrectly configured, and is swapping memory to disk. Which Linux commands help you to identify whether swapping is occurring? (Select all that apply)

Options:

A.

free

B.

df

C.

memcat

D.

top

E.

jps

F.

vmstat

G.

swapinfo

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Questions 5

Which process instantiates user code, and executes map and reduce tasks on a cluster running MapReduce v2 (MRv2) on YARN?

Options:

A.

NodeManager

B.

ApplicationMaster

C.

TaskTracker

D.

JobTracker

E.

NameNode

F.

DataNode

G.

ResourceManager

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Questions 6

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

Options:

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/&(user)/apache/application_&(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

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Questions 7

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

Options:

A.

NodeManager

B.

ApplicationMaster

C.

ApplicationManager

D.

ResourceManager

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Questions 8

You are configuring your cluster to run HDFS and MapReducer v2 (MRv2) on YARN. Which two daemons needs to be installed on your cluster’s master nodes? (Choose two)

Options:

A.

HMaster

B.

ResourceManager

C.

TaskManager

D.

JobTracker

E.

NameNode

F.

DataNode

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Questions 9

You observed that the number of spilled records from Map tasks far exceeds the number of map output records. Your child heap size is 1GB and your io.sort.mb value is set to 1000MB. How would you tune your io.sort.mb value to achieve maximum memory to disk I/O ratio?

Options:

A.

For a 1GB child heap size an io.sort.mb of 128 MB will always maximize memory to disk I/O

B.

Increase the io.sort.mb to 1GB

C.

Decrease the io.sort.mb value to 0

D.

Tune the io.sort.mb value until you observe that the number of spilled records equals (or is as close to equals) the number of map output records.

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Exam Code: CCA-500
Exam Name: Cloudera Certified Administrator for Apache Hadoop (CCAH)
Last Update: May 1, 2024
Questions: 60
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