Hadoop Input Output Operations MCQ question and answer with solution

51

We can declare the schema of our data either in a . . . . . . . . file.

A) JSON B) XML C) SQL D) R

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Answer & Solution

Answer: Option C

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52

. . . . . . . . are a way of encoding structured data in an efficient yet extensible format.

A) Thrift B) Protocol Buffers C) Avro D) None of the mentioned

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Answer & Solution

Answer: Option B

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53

Point out the correct statement.

A) Apache Avro is a framework that allows you to serialize data in a format that has a schema built in B) The serialized data is in a compact binary format that doesn't require proxy objects or code generation C) Including schemas with the Avro messages allows any application to deserialize the data D) All of the mentioned

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Answer & Solution

Answer: Option D

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54

. . . . . . . . data file takes is based on avro serialization framework which was primarily created for hadoop.

A) Oozie B) Avro C) cTakes D) Lucene

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Answer & Solution

Answer: Option B

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55

Point out the correct statement.

A) The sequence file also can contain a "secondary" key-value list that can be used as file Metadata B) SequenceFile formats share a header that contains some information which allows the reader to recognize is format C) There're Key and Value Class Name's that allow the reader to instantiate those classes, via reflection, for reading D) All of the mentioned

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Answer & Solution

Answer: Option D

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56

The . . . . . . . . codec from Google provides modest compression ratios.

A) Snapcheck B) Snappy C) FileCompress D) None of the mentioned

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Answer & Solution

Answer: Option B

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57

The . . . . . . . . method in the ModelCountReducer class "reduces" the values the mapper collects into a derived value.

A) count B) add C) reduce D) all of the mentioned

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Answer & Solution

Answer: Option C

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58

How many formats of SequenceFile are present in Hadoop I/O?

A) 2 B) 3 C) 4 D) 5

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Answer & Solution

Answer: Option B

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59

Hadoop I/O Hadoop comes with a set of . . . . . . . . for data I/O.

A) methods B) commands C) classes D) none of the mentioned

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Answer & Solution

Answer: Option D

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60

. . . . . . . . facilitates construction of generic data-processing systems and languages.

A) Untagged data B) Dynamic typing C) No manually-assigned field IDs D) All of the mentioned

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Answer & Solution

Answer: Option B

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Hadoop Input Output Operations MCQ question and answer with solution | Hadoop MCQs