Advanced Mapreduce Concepts — Part 1 MCQs with Explanations

Cache files for tasks is the correct answer to “What is the purpose of the Hadoop Distributed Cache in MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Track the progress of MapReduce jobs is the correct answer to “In Hadoop MapReduce, what is the role of the Hadoop Counters”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Represents a chunk of input data is the correct answer to “What is the function of the Hadoop InputSplit in MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Combine intermediate key-value pairs on the mapper side is the correct answer to “In advanced MapReduce, what is the significance of the Hadoop Combiner class”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Chaining multiple Map and Reduce tasks in a single job is the correct answer to “What does the term "MapReduce chaining" refer to in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Share data between Map and Reduce tasks is the correct answer to “In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Side Data Distribution"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Sort keys within a reducer is the correct answer to “What is the primary function of the Hadoop MapReduce "Secondary Sort"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Store historical information about completed jobs is the correct answer to “In advanced MapReduce, what is the role of the Hadoop Job History Server”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Customize the way input data is read is the correct answer to “What is the significance of the Hadoop MapReduce "Custom InputFormat" in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Execute a backup task if the original task is slow is the correct answer to “In advanced MapReduce, what does the term "MapReduce speculative execution" refer to”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the primary purpose of the Hadoop MapReduce "In-Mapper Combining" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Join data on the mapper side is the correct answer to “In advanced MapReduce, what is the significance of the Hadoop MapReduce "Map-side Join"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Cache files for tasks is the correct answer to “What is the purpose of the Hadoop MapReduce "DistributedCache" in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Compress the map output data is the correct answer to “In advanced MapReduce, what is the role of the Hadoop MapReduce "Map Output Compression"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Optimize data locality for tasks is the correct answer to “What does the term "MapReduce locality optimization" refer to in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Sort keys on the mapper side is the correct answer to “In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Map Output Sorting"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the primary function of the Hadoop MapReduce "Map-side Aggregation" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Combine intermediate key-value pairs on the mapper side is the correct answer to “What is the purpose of the Hadoop MapReduce "Combiner Optimization" in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Filter data on the mapper side is the correct answer to “In advanced MapReduce, what is the role of the Hadoop MapReduce "Map-side Filtering" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Process data stored in HBase is the correct answer to “What is the significance of the Hadoop MapReduce "MapReduce over HBase" in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Compress the map output data is the correct answer to “In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Map Output Compression"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Execute a backup task if the original task is slow is the correct answer to “What does the term "MapReduce speculative execution" refer to in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Manage computation resources is the correct answer to “In advanced MapReduce, what is the primary purpose of the Hadoop MapReduce "OutputCommitter"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Join data on the mapper side is the correct answer to “What is the primary function of the Hadoop MapReduce "Map-side Join" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Filter data on the mapper side is the correct answer to “In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Map-side Filtering" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Sort keys on the mapper side is the correct answer to “What is the role of the Hadoop MapReduce "Map Output Sorting" in advanced MapReduce”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Execute a backup task if the original task is slow is the correct answer to “In advanced MapReduce, what is the significance of the Hadoop MapReduce "MapReduce speculative execution"”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Combine intermediate key-value pairs on the mapper side is the correct answer to “In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Map-side Aggregation" technique”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

SequenceFileAsBinaryOutputFormat is the correct answer to “Which of the following writes MapFiles as output”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

100% is the correct answer to “The updated queue configuration should be a valid one i.e. queue-capacity at each level should be equal to . . . . . . . .”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

HDFS is the correct answer to “The split size is normally the size of a . . . . . . . . block, which is appropriate for most applications.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

addInputPath() is the correct answer to “Which of the following method add a path or paths to the list of inputs”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

ARCHIVE is the correct answer to “When a block is warm, some of its replicas are stored in DISK and the remaining replicas are stored in . . . . . . . .”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

Archival is the correct answer to “. . . . . . . . storage is a solution to decouple growing storage capacity from compute capacity.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

capacity is the correct answer to “The queue definitions and properties such as . . . . . . . . ACLs can be changed, at runtime.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

logs is the correct answer to “Which of the following command is used to dump the log container”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

SSL is the correct answer to “Data transfer between Web-console and clients are protected by using . . . . . . . .”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

TextInputFormat is the correct answer to “. . . . . . . . generates keys of type LongWritable and values of type Text.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

core-site.xml is the correct answer to “. . . . . . . . gives site-specific configuration for a given hadoop installation.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.

getTaskCompletionEvents(int startFrom) is the correct answer to “. . . . . . . . get events indicating completion (success/failure) of component tasks.”. This question is standard in competitive examination syllabi for Advanced Mapreduce Concepts.