Mapreduce Programming Model — Part 1 MCQs with Explanations

Batch processing of large datasets is the correct answer to “What is the primary function of the MapReduce programming model in Hadoop”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Data processing is the correct answer to “In the MapReduce model, what does the Map phase handle”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Data sorting and grouping is the correct answer to “What does the Shuffle phase in MapReduce involve”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the role of the Combiner in the MapReduce model”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Reducer is the correct answer to “Which component in MapReduce is responsible for sorting and grouping data”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Determine the reducer for each key is the correct answer to “What is the purpose of the Partitioner in MapReduce”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Task that processes the Reduce output is the correct answer to “In MapReduce, what does the term "Reducer" refer to”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Manages task execution in MapReduce jobs is the correct answer to “What is the significance of the Hadoop MapReduce job tracker”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Processes input key-value pairs is the correct answer to “What does the MapReduce "Map" function do”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Aggregate values is the correct answer to “What is the primary purpose of the MapReduce "Reduce" function”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Defines how input data is read is the correct answer to “What does the term "InputFormat" represent in MapReduce”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

InputFormat is the correct answer to “Which phase in MapReduce is responsible for reading input data”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the purpose of the MapReduce "Combine" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Defines the reduce output format is the correct answer to “What is the function of the MapReduce "OutputFormat"”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Process input key-value pairs is the correct answer to “In MapReduce, what is the purpose of the Map task”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Determine the reducer for each key is the correct answer to “What is the purpose of the MapReduce "Partitioner"”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Task that processes the Map input is the correct answer to “In MapReduce, what does the term "Map" refer to”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Sort and shuffle data is the correct answer to “What is the primary function of the MapReduce "Sort" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Manage task execution in MapReduce jobs is the correct answer to “In the MapReduce programming model, what is the role of the Hadoop TaskTracker”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Manage Hadoop ecosystem tools is the correct answer to “What is the purpose of the MapReduce "OutputCommitter"”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Data sorting and grouping is the correct answer to “What is the function of the MapReduce "Shuffle" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What does the term "Combiner" represent in the context of MapReduce”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Aggregate values is the correct answer to “What does the MapReduce "Reducer" function do”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Process input key-value pairs is the correct answer to “What is the significance of the MapReduce "Map" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Defines how input data is read is the correct answer to “In MapReduce, what is the purpose of the "InputSplit"”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Manage computation resources is the correct answer to “What is the role of the Hadoop Secondary NameNode in MapReduce”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the function of the MapReduce "Combine" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Sort and shuffle data is the correct answer to “What is the primary purpose of the MapReduce "Sort and Shuffle" phase”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Defines how input data is read is the correct answer to “What is the purpose of the MapReduce "InputFormat"”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

archives is the correct answer to “The . . . . . . . . option allows you to copy jars locally to the current working directory of tasks and automatically unjar the files.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

JobConfigurable.configure is the correct answer to “Mapper implementations are passed the JobConf for the job via the . . . . . . . . method.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Java is the correct answer to “Although the Hadoop framework is implemented in Java, MapReduce applications need not be written in . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

MapReduce is the correct answer to “Running a . . . . . . . . program involves running mapping tasks on many or all of the nodes in our cluster.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Hbase is the correct answer to “Which is the most popular NoSQL database for scalable big data store with Hadoop”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

inputs is the correct answer to “The number of maps is usually driven by the total size of . . . . . . . .”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Reducer is the correct answer to “Input to the . . . . . . . . is the sorted output of the mappers.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

TaskTracker is the correct answer to “A . . . . . . . . node acts as the Slave and is responsible for executing a Task assigned to it by the JobTracker.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Shuffle and Sort is the correct answer to “Which of the following phases occur simultaneously”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

Reducer is the correct answer to “Which of the following class is provided by the Aggregate package”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.

NoSQL is the correct answer to “. . . . . . . . systems are scale-out file-based (HDD) systems moving to more uses of memory in the nodes.”. This question is standard in competitive examination syllabi for Mapreduce Programming Model.