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Mapr (HP) Hadoop Developer Certification Questions and Answers (Dumps and Practice Questions)



Question : What does the following WebHDFS command do?
Curl -1 -L "http://host:port/webhdfs/v1/foo/bar?op=OPEN"

: What does the following WebHDFS command do?
1. Make a directory /foo/bar
2. Read a file /foo/bar
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4. Delete a directory /foo/bar

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Explanation:




Question : Rows from the HBase can directly be inserted as input to Mapreduce job

: Rows from the HBase can directly be inserted as input to Mapreduce job
1. True
2. False


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Explanation: You can run MR over data that is stored in HBase

Refer HadoopExam.com Recorded Training Module : 18






Question : Which of the following is/are valid options while submitting MapReduce streaming job.
A. D dfs.data.dir=/tmp
B. -D mapred.local.dir=/tmp/local
C. -D mapred.system.dir=/tmp/system
D. -D mapred.temp.dir=/tmp/temp
: Which of the following is/are valid options while submitting MapReduce streaming job.
1. A,B,C
2. B,C,D
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4. A,B,D
5. A,B,C,D

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Related Questions

Question : You have following data in a Hive table, assuming based on the tag you want to join the data
colortable,1,pink,300
colortable,2,red,500
colortable,3,yellow,300
flowertable,1,rose
flowertable,2,amaryllis
flowertable,3,sunflower
flowertable,4,lily
flowertable,5,cosmos
And produce the output as below hive query.
Select color,flower from colortable join flowertable ON (colortable.id=flowertable.id)
Select the correct MapReduce program which produces the output as above query.

 : You have following data in a Hive table, assuming based on the tag you want to join the data
1. 1
2. 2
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Question :

 :
1. 1
2. 2
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Question :

There are two input files as below to MapReduce Join job.

input/A
A.a11 A.a12
A.a21 A.a22
B.a21 A.a32
A.a31 A.a32
B.a31 A.a32

input/B
A.a11 B.a12
A.a11 B.a13
B.a11 B.a12
B.a21 B.a22
A.a31 B.a32
B.a31 B.a32

After running the MapReduce join code snippet(Left Hand Side)

What would be the first line of the output

 :
1. A.a11 A.a12 B.a12
2. A.a11 A.a12 A.a11 B.a13
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4. B.a21 A.a32 B.a21 B.a22


Question :

Select the correct code snippet which will produce the 12 files each for a month, considering you have defined 12 reducers for this job

Sample input data
10.1.255.266,hadoopexam.com,index.html,20/Aug/2013
10.1.255.2,hadoopexam.com,index.html,11/Feb/2013
10.1.255.233,hadoopexam.com,index.html,14/Jan/2013

 :
1. 1
2. 2
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Question :

From the below given code snippet please select the correct one which is able to create Compressed Sequence file.

:
1. 1
2. 2
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Question :

Select the correct code snippet which is able to read the compressed sequence file

 :
1. 1
2. 2
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