Hortonworks HDPCD Quiz 1 Topic 1 Questions 1-5

Question: 1

Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

AThe keys given to a reducer aren't in a predictable order, but the values associated with those keys always are.

BBoth the keys and values passed to a reducer always appear in sorted order.

CNeither keys nor values are in any predictable order.

DThe keys given to a reducer are in sorted order but the values associated with each key are in no predictable order

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Question: 2

Examine the following Hive statements:

q2_HDPCD

Assuming the statements above execute successfully, which one of the following statements is true?

AHive reformats File1 into a structure that Hive can access and moves into to/user/joe/x/

BThe file named File1 is moved to to/user/joe/x/

CThe contents of File1 are parsed as comma-delimited rows and loaded into /user/joe/x/

DThe contents of File1 are parsed as comma-delimited rows and stored in a database

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Question: 3

Your client application submits a MapReduce job to your Hadoop cluster. Identify the Hadoop daemon on which the Hadoop framework will look for an available slot schedule a MapReduce operation.

ATaskTracker

BNameNode

CDataNode

DJobTracker

ESecondary NameNode

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Question: 4

What does the following WebHDFS command do?

Curl -1 -L ''http://host:port/webhdfs/v1/foo/bar?op=OPEN''

AMake a directory /foo/bar

BRead a file /foo/bar

CList a directory /foo

DDelete a directory /foo/bar

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Question: 5

You need to move a file titled ''weblogs'' into HDFS. When you try to copy the file, you can't. You know you have ample space on your DataNodes. Which action should you take to relieve this situation and store more files in HDFS?

AIncrease the block size on all current files in HDFS.

BIncrease the block size on your remaining files.

CDecrease the block size on your remaining files.

DIncrease the amount of memory for the NameNode.

EIncrease the number of disks (or size) for the NameNode.

FDecrease the block size on all current files in HDFS.

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Hortonworks HDPCD Quiz:1 Topic:1 Questions:1-5