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



Question : Please map the followings
A. Find all the Running Jobs
B. Get the completion status of a Particular job
C. Stop already running Job

1. hadoop job -list
2. hadoop job -kill job_id
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: Please map the followings
1. A-1, B-2, C-3
2. A-1, B-3, C-2
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4. A-3, B-1, C-2
5. A-3, B-2, C-3

Correct Answer : Get Lastest Questions and Answer :
Explanation:




Question : Which is/are the correct ways to set the Job Priority from below?


: Which is/are the correct ways to set the Job Priority from below?
1. Configuration conf = new Configuration
conf.set("mapred.job.priority" , "VERY_LOW")


2. Passing as a parameter while submitting job
-D mapred.job.priority=VERY_LOW


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hadoop job -set-priority job_id


4. 1,2

5. 1,2,3


Correct Answer : Get Lastest Questions and Answer :
Explanation: All are the correct ways to set the Job Priority




Question : You can use the Job Priority to prioritize your Job Over other Jobs in other Pools or Queue
: You can use the Job Priority to prioritize your Job Over other Jobs in other Pools or Queue
1. True
2. False

Correct Answer : Get Lastest Questions and Answer :
Explanation: you cannot use the Job Priority to prioritize your Job Over other Jobs in other Pools or Queue


Related Questions

Question : What all information as Tasks sends back to TaskTracker?

 : What all information as Tasks sends back to TaskTracker?
1. Task Status

2. Task Counters

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4. Only 1 and 2

5. 1,2,3



Question : Select statements, which are correct with respect to Spark Streaming


: Select statements, which are correct with respect to Spark Streaming
1. You can use other language program in MapReduce

2. It May Increase or decrease the performance of Job

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4. 1,2

5. 1,2,3



Question : In Hadoop Streaming

: In Hadoop Streaming
1. PipeMap is used to run your Mapper written in any other language

2. PipeReduce is used to run your Reducer written in any other language

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4. 1,2

5. 1,2,3


Question : Let's assume you have following files in the hdfs directory called merge.
Test1.txt
hadoopexam.com Hadoop Training 1

Test2.txt
www.hadoopexam.com Hadoop YARN Training

Test3.txt
http://hadoopexam.com Amazon WebService Training

Now you run the following command
hadoop fs -getmerge merge/ output1.txt
What is the correct statement?


 : Let's assume you have following files in the hdfs directory called merge.
1. It will create a new file called output1.txt in local file system, with the merged content from the all three files
2. It will create a new file called output1.txt in hdfs file system, with the merged content from the all three files
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4. This command will successful but will not merge the files because of, what to do with new line character is not defined.


Question : Let's assume you have following files in the hdfs directory called merge.
Test1.txt
hadoopexam.com Hadoop Training 1
Test2.txt
www.hadoopexam.com Hadoop YARN Training
Test3.txt
http://hadoopexam.com Amazon WebService Training
Now you run the following command
hadoop fs -getmerge merge/ output1.txt
What is the content in the output1.txt file

 : Let's assume you have following files in the hdfs directory called merge.
1.
hadoopexam.com Hadoop Training 1
www.hadoopexam.com Hadoop YARN Training
http://hadoopexam.com Amazon WebService Training

2.
www.hadoopexam.com Hadoop YARN Training
hadoopexam.com Hadoop Training 1
http://hadoopexam.com Amazon WebService Training

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It could be any random order
4.
www.hadoopexam.com Hadoop YARN Traininghadoopexam.com Hadoop Training 1http://hadoopexam.com Amazon WebService Training


Question : What happens when a TaskTracker does not send back heartbeat to JobTracker?


 : What happens when a TaskTracker does not send back heartbeat to JobTracker?
1. JobTracker re-tries 3 times to submit the same Job

2. Job Tracker marks Task Tracker as down and won't schedule subsequent tasks.

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4. 2 and 3

5. 1,2,3