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



Question : Select correct statements regarding logs in Hadoop program


: Select correct statements regarding logs in Hadoop program
1. You can configure log levels in commons-logging.properties file and needs to be paced in CLASSPATH

2. Supported log levels are trace, debug, info, warn ,error and fatal. You can also add System.out.prinln as well in the Mapper and Reducer code

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4. 1,2

5. 1,2,3


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Explanation:




Question : What is the purpose of a Driver class ?

: What is the purpose of a Driver class ?
1. It creates the output directory for entire Job

2. It is responsible for reading data from input file and shuffling, sorting of intermediate data.

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4. It kills the job as soon as last reducer finishes

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Question : In the MapReduce job, map() method of the Mapper is called for each key-value pairs. Now this key-value pair are collected together and sent toString


: In the MapReduce job, map() method of the Mapper is called for each key-value pairs. Now this key-value pair are collected together and sent toString
1. RecordReader

2. OutputFormat

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4. Partitioner


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Explanation: Each output the map() method will be sent to partitioner first based on their has key partition algorithm (default) and from there
it will go to reducer.


Related Questions

Question : What are the reasons new Hadoop Framework named YARN has been developed?


 : What are the reasons new Hadoop Framework named YARN has been developed?
1. Tasks slot configuration is not dynamic

2. MRv1 only supports MapReduce

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4. 2,3

5. 1,2,3



Question : Which of the following main responsibility of JobTracker has been separated in YARN?


 : Which of the following main responsibility of JobTracker has been separated in YARN?
1. Resource Management

2. Job Management

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4. 1,2

5. 1,2,3



Question : Which all are the responsibilities of ResourceManager in MRv?


 : Which all are the responsibilities of ResourceManager in MRv?
1. Resource Negotiations

2. Cluster Resources allocations

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4. 2,3

5. 1,2,3



Question : What is the Responsibility of Application Master in MRv?


 : What is the Responsibility of Application Master in MRv?
1. Resource negotiation

2. Job Monitoring

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4. 1,2

5. 1,2,3



Question : Map the following
A. Resource Manager
B. Node Manager
C. Application Manager
D. Container

1. Launches new Application Master
2. Track Node Manager and Create or deletes the container
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4. Request Containers for Application


: Map the following
1. A-1, B-2, C-3,D-4
2. A-1, B-2, C-4,D-3
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4. A-2, B-1, C-3,D-4
5. A-4, B-3, C-2,D-1


Question : Select correct statement regarding YARN


 : Select correct statement regarding YARN
1. We don t have to do any specific slot configuration for MapTask and ReduceTask

2. YARN is same as JobTracker of MRv1 , which supports multiple instances per cluster to scale.

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4. 1,2

5. 1,2,3