Mapreduce Programming Model — Part 2 MCQs with Explanations

Isilon solutions is the correct answer to “. . . . . . . . are highly resilient and eliminate the single-point-of-failure risk with traditional Hadoop deployments.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

HashPartitioner is the correct answer to “. . . . . . . . is the default Partitioner for partitioning key space.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Hadoop Streaming is the correct answer to “. . . . . . . . is a utility which allows users to create and run jobs with any executables as the mapper and/or the reducer.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Bigtable is the correct answer to “HBase provides . . . . . . . . like capabilities on top of Hadoop and HDFS.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

None of the mentioned is the correct answer to “The output of the . . . . . . . . is not sorted in the Mapreduce framework for Hadoop.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Scale out is the correct answer to “HDFS and NoSQL file systems focus almost exclusively on adding nodes to . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Scale-up is the correct answer to “. . . . . . . . refers to incremental costs with no major impact on solution design, performance and complexity.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Reporter is the correct answer to “Mapper and Reducer implementations can use the . . . . . . . . to report progress or just indicate that they are alive.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

KeyFieldBasedComparator is the correct answer to “Which of the following class provides a subset of features provided by the Unix/GNU Sort”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Maptask is the correct answer to “. . . . . . . . part of the MapReduce is responsible for processing one or more chunks of data and producing the output results.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Reduce is the correct answer to “. . . . . . . . function is responsible for consolidating the results produced by each of the Map() functions/tasks.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

HCatalog is the correct answer to “Hadoop data is not sequenced and is in 64MB to 256MB block sizes of delimited record values with schema applied on read based on . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

0.95 is the correct answer to “The right number of reduces seems to be . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

JobConf is the correct answer to “. . . . . . . . is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

all of the mentioned is the correct answer to “Which of the following Hadoop streaming command option parameter is required”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Mapper is the correct answer to “. . . . . . . . maps input key/value pairs to a set of intermediate key/value pairs.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Cut is the correct answer to “Hadoop has a library class, org.apache.hadoop.mapred.lib.FieldSelectionMapReduce, that effectively allows you to process text data like the unix . . . . . . . . utility.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

-cmdenv EXAMPLE_DIR=/home/example/dictionaries/ is the correct answer to “To set an environment variable in a streaming command use . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

generic is the correct answer to “Streaming supports streaming command options as well as . . . . . . . . command options.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

OutputCollector is the correct answer to “. . . . . . . . is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

KeyFieldBasedPartitioner is the correct answer to “. . . . . . . . class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.