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

Question : Select the correct options


1. NameNode store the metadata for the files
2. DataNode holds the actual blocks
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4. All of the above
5. 1 and 2 are correct

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Question : Select the correct statement for the NameNode ?


1. NameNode daemon must be running at all the times
2. NameNode holds all its metadata in RAM for fast access.
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4. 1,2 and 3 are correct
5. 1 and 2 are correct



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Question : If NameNode stops, the cluster becomes inaccessible ?


1. True
2. Flase

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Related Questions

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Question : Which of the following information can be captured using Framework level counters?
A. CPU Statistics e.g. total time spent executing map and reduce tasks
B. Garbage collect ion counter
C. How much RAM was consumed by all tasks
D. A,B
E. A,B,C


1. CPU Statistics e.g. total time spent executing map and reduce tasks

2. Garbage collect ion counter

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4. 1,2

5. 1,2,3


Question : Select correct statement regarding Counters
A. We can use Custom Counter in Both Reducer and Mapper for Count Bad Records or Outlier checks
B. Counters can be incremented as well decremented in Mapper and Reducer
C. Counter can be checked in Job History Server
D. Counters are stored in the JobTracker Memory
E. We can create maximum 100 Counters



1. A,B,C,D
2. A,B,C,E
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4. A,B,D,E
5. B,C,D,E


Question : What of the following information can be captured using existing counter?
A. Total number of Bytes read and written
B. Total number of Tasks Launched (Mapper + Reducer)
C. CPU Consumed
D. Memory Used
E. Number of records which are ignored while Map Tasks

1. A,B,C,D
2. A,B,C,E
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4. A,B,D,E
5. B,C,D,E


Question : Which all statements are true regarding MCS (MapR Control Server)



1. MCS, can be used for both Managing and Monitoring your MapR Cluster

2. We have to do one time configuration of Matrices database

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4. 1,2
5. 1,2,3



Question : You have given screenshot of MCS ,please select correct statement


1. Total time taken by job is approx. 14Seconds

2. Time taken by Map Tasks is 7.9 Seconds

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4. 2,3
5. 1,2,3


Question : Which of the following logs can be viewed from MCS
A. Standard out generated from a task
B. Standard error generated from a task
C. Syslog log file entries generated by a task
D. Profile output generated by a task
E. Debug script output generated by a task

1. A,B,C,D
2. A,B,C,E
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4. A,B,D,E
5. A,B,C,D,E