a) LongReadable b) LongWritable c) ShortReadable d) All of the mentioned Answer: b Explanation: The value is ...
View QuestionPoint out the correct statement.
a) With TextInputFormat and KeyValueTextInputFormat, each mapper receives a variable number of lines of input b) StreamXmlRecordReader, the page ...
View Question___________ takes node and rack locality into account when deciding which blocks to place in the same split.
a) CombineFileOutputFormat b) CombineFileInputFormat c) TextFileInputFormat d) None of the mentioned Answer: b Explanation: CombineFileInputFormat does not ...
View QuestionWhich 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 Answer: b Explanation: FileInputFormat offers four ...
View Question_________ is the base class for all implementations of InputFormat that use files as their data source.
a) FileTextFormat b) FileInputFormat c) FileOutputFormat d) None of the mentioned Answer: b Explanation: FileInputFormat provides implementation ...
View QuestionWhich of the following is the only way of running mappers?
a) MapReducer b) MapRunner c) MapRed d) All of the mentioned Answer: b Explanation: Having calculated the ...
View Question______________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.
a) MultithreadedRunner b) MultithreadedMap c) MultithreadedMapRunner d) SinglethreadedMapRunner Answer: c Explanation: A RecordReader is little more than ...
View QuestionAn ___________ is responsible for creating the input splits, and dividing them into records.
a) TextOutputFormat b) TextInputFormat c) OutputInputFormat d) InputFormat Answer: d Explanation: As a MapReduce application writer, you ...
View QuestionPoint out the wrong statement.
a) If V2 and V3 are the same, you only need to use setOutputValueClass() b) The overall effect of ...
View QuestionAn input _________ is a chunk of the input that is processed by a single map.
a) textformat b) split c) datanode d) all of the mentioned Answer: b Explanation: Each split ...
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