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• Point out the wrong statement.(a) Hadoop works better with a small number of large files than a large number of small files(b) CombineFileInputFormat is designed to work well with small files(c) CombineFileInputFormat does not compromise the speed at which it can process the input in a typical MapReduce job(d) None of the mentionedThis question was addressed to me in final exam.This intriguing question originated from Mapreduce Formats topic in section MapReduce Types and Formats of Hadoop
• The split size is normally the size of a ________ block, which is appropriate for most applications.(a) Generic(b) Task(c) Library(d) HDFSThe question was asked in unit test.Enquiry is from Mapreduce Formats topic in section MapReduce Types and Formats of Hadoop
• Point out the correct statement.(a) The minimum split size is usually 1 byte, although some formats have a lower bound on the split size(b) Applications may impose a minimum split size(c) The maximum split size defaults to the maximum value that can be represented by a Java long type(d) All of the mentionedThis question was posed to me in class test.My question comes from Mapreduce Formats topic in section MapReduce Types and Formats of Hadoop
• Which of the following writes MapFiles as output?(a) DBInpFormat(b) MapFileOutputFormat(c) SequenceFileAsBinaryOutputFormat(d) None of the mentionedThis question was posed to me in quiz.This question is from Mapreduce Formats in section MapReduce Types and Formats of Hadoop
• Which of the following is the default output format?(a) TextFormat(b) TextOutput(c) TextOutputFormat(d) None of the mentionedThis question was posed to me during an interview.This key question is from Mapreduce Formats topic in division MapReduce Types and Formats of Hadoop
• ___________ is an input format for reading data from a relational database, using JDBC.(a) DBInput(b) DBInputFormat(c) DBInpFormat(d) All of the mentionedI have been asked this question in class test.This is a very interesting question from Mapreduce Formats topic in division MapReduce Types and Formats of Hadoop
• __________ is a variant of SequenceFileInputFormat that converts the sequence file’s keys and values to Text objects.(a) SequenceFile(b) SequenceFileAsTextInputFormat(c) SequenceAsTextInputFormat(d) All of the mentionedThis question was addressed to me in an online interview.My question is based upon Mapreduce Formats in chapter MapReduce Types and Formats of Hadoop
• __________ class allows you to specify the InputFormat and Mapper to use on a per-path basis.(a) MultipleOutputs(b) MultipleInputs(c) SingleInputs(d) None of the mentionedI have been asked this question in unit test.My query is from Mapreduce Formats in portion MapReduce Types and Formats of Hadoop
• 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 mentionedThe question was posed to me in an online interview.My query is from Mapreduce Formats in section MapReduce Types and Formats of Hadoop
• _________ is the output produced by TextOutputFor mat, Hadoop default OutputFormat.(a) KeyValueTextInputFormat(b) KeyValueTextOutputFormat(c) FileValueTextInputFormat(d) All of the mentionedThis question was posed to me in an interview for job.My query is from Mapreduce Formats in division MapReduce Types and Formats of Hadoop