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

Question :

in 3 mappers and 2 reducers how many distinct copy operations will be there in the sort or shuffle phase


1. 3
2. 2
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4. 5



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Explanation: Since each mappers intermediate output will go to every reducers




Question :

In which scenario MapReduce is not suitable..


1. text mining on the unstructured documents
2. Analyzing web documents
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4. for a large computation of financial risk modeling and performance analysis.



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Question : How can you use binary data in MapReduce?


1. Binary data can be used directly by a map-reduce job. Often binary data is added to a sequence file
2. Binary data cannot be used by Hadoop framework. Binary data should be converted to a Hadoop compatible format prior to loading
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4. Hadoop can freely use binary files with map-reduce jobs so long as the files have headers


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Explanation: Binary data can be packaged in sequence files. Hadoop cluster does not work very well with large numbers of small files. Therefore, small files should be combined into bigger
ones..

Related Questions

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Question : How data node sends their block report to NameNode or JobTracker


1. Data node sends HeartBeat information only once, when data is stored on HDFS

2. Data node sends HeartBeat information once in a day

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4. All 1 and 3



Question : Which of the following Scheduler you can configure in Hadoop?
A. Fair Scheduler
B. Capacity Scheduler
C. Weight Scheduler
D. Timing Scheduler


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


Question : Which is true about Fair Scheduler in Hadoop?


1. It is a default scheduler in Hadoop

2. Each user has its own pool

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4. 1,3

5. 1,2,3



Question : Which is a true statement regarding Capacity Scheduler?

1. Queues can be configured with their weighted access

2. Hierarchical Queue can be configured

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


Question : Select correct statement regarding Fair Scheduler



1. Fair scheduler gives each user equal share. By default 1 pool is per user.

2. When a slot is free, most starved job will get free slots

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4. 1,2

5. 1,2,3


Question : In capacity scheduler Jobs are submitted to Queues. What order is maintained inside the Queue (Default)

1. LIFO

2. FIFO

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4.