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

Question : Which class/object represent a MapReduce job

1. Job
2. JobControl
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Correct Answer : Get Lastest Questions and Answer :

Job object represent the actual Job and JobControl object do the managing and monitoring of the Job,
While JobConf object the configuration related to job like input path and output path.




Question : If X and Y are two MapReduce jobs and their dependency is set as below

x.addDependingJob(y)

What does it mean ?

1. X will not start until y has finished
2. Y will not start until x has finished
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4. All of the above



Correct Answer : Get Lastest Questions and Answer :

Using addDependingJob(Job job) method you can define the dependency of the MapReuce Job, to control the flow.




Question : The option or switch in "hadoop fs" command for detailed help is

1. '-show'
2. '-help'
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4. Any of the above

Correct Answer : Get Lastest Questions and Answer :

You have to use hadoop fs -help to show all the command related to hadoop file system.

Related Questions

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Question : Without the metadata on the NameNode file can be recovered ?




1. True
2. False


Question : Select the correct option ?

1. NameNode is the bottleneck for reading the file in HDFS
2. NameNode is used to determine the all the blocks of a file
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4. All of the above


Question : Which is the correct option for accessing the file which is stored in HDFS


1. Application can read and write files in HDFS using JAVA API
2. There is a command line option to access the files
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4. 1,2 and 3 are correct
5. 1 and 2 are correct


Question : Which is the correct command to copy files from local to HDFS file systems

1. hadoop fs -copy pappu.txt pappu.txt
2. hadoop fs -copyFromPath pappu.txt pappu.txt
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4. None of the above


Question : Which is the correct command to list all the files from current directory

1. hadoop fs -ls
2. hadoop fs -list
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4. All of the above




Question : Which is the correct command ?


1. hadoop fs -ls
2. hadoop fs -copyToLocal /user/pappu/pappu.txt pappu.txt
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4. 1,2 and 3 are correct
5. Only 1 and 2 are correct