Advanced MapReduce Concepts MCQ question and answer with solution

31

Point out the correct statement.

A) Each queue has strict ACLs which controls which users can submit applications to individual queues B) Hierarchy of queues is supported to ensure resources are shared among the sub-queues of an organization C) Queues are allocated a fraction of the capacity of the grid in the sense that a certain capacity of resources will be at their disposal D) All of the mentioned

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Answer & Solution

Answer: Option D

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32

Which of the following writes MapFiles as output?

A) DBInpFormat B) MapFileOutputFormat C) SequenceFileAsBinaryOutputFormat D) None of the mentioned

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Answer & Solution

Answer: Option C

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33

The updated queue configuration should be a valid one i.e. queue-capacity at each level should be equal to . . . . . . . .

A) 50% B) 75% C) 100% D) 0%

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Answer & Solution

Answer: Option C

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34

The split size is normally the size of a . . . . . . . . block, which is appropriate for most applications.

A) Generic B) Task C) Library D) HDFS

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Answer & Solution

Answer: Option D

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35

Point out the wrong statement.

A) If V2 and V3 are the same, you only need to use setOutputValueClass() B) The overall effect of Streaming job is to perform a sort of the input C) A Streaming application can control the separator that is used when a key-value pair is turned into a series of bytes and sent to the map or reduce process over standard input D) None of the mentioned

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Answer & Solution

Answer: Option D

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36

Point out the wrong statement.

A) Hadoop sequence file format stores sequences of binary key-value pairs B) SequenceFileAsBinaryInputFormat is a variant of SequenceFileInputFormat that retrieves the sequence file's keys and values as opaque binary objects C) SequenceFileAsTextInputFormat is a variant of SequenceFileInputFormat that retrieves the sequence file's keys and values as opaque binary objects. D) None of the mentioned

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Answer & Solution

Answer: Option C

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37

Which of the following method add a path or paths to the list of inputs?

A) setInputPaths() B) addInputPath() C) setInput() D) none of the mentioned

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Answer & Solution

Answer: Option B

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38

When a block is warm, some of its replicas are stored in DISK and the remaining replicas are stored in . . . . . . . .

A) ROM_DISK B) ARCHIVE C) RAM_DISK D) All of the mentioned

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Answer & Solution

Answer: Option B

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39

. . . . . . . . storage is a solution to decouple growing storage capacity from compute capacity.

A) DataNode B) Archival C) Policy D) None of the mentioned

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Answer & Solution

Answer: Option B

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40

The queue definitions and properties such as . . . . . . . . ACLs can be changed, at runtime.

A) tolerant B) capacity C) speed D) all of the mentioned

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Answer & Solution

Answer: Option B

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Advanced MapReduce Concepts MCQ question and answer with solution | Hadoop MCQs