Developing Mapreduce Applications - Study Mode

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[#41] What is the role of the Hadoop Mapper.Context in a MapReduce application?

(A) Generate intermediate key-value pairs

(B) Manages computation resources

(C) Execute MapReduce jobs

(D) Read and parse input data

Correct Answer

(A) Generate intermediate key-value pairs

[#42] What is the primary function of the Hadoop Reducer.Context in a MapReduce application?

(A) Aggregate values on the reducer side

(B) Manages computation resources

(C) Execute MapReduce jobs

(D) Read and parse input data

Correct Answer

(A) Aggregate values on the reducer side

[#43] In a MapReduce program, what is the purpose of the Hadoop Mapper.Context?

(A) Generate intermediate key-value pairs

(B) Manages computation resources

(C) Execute MapReduce jobs

(D) Read and parse input data

Correct Answer

(A) Generate intermediate key-value pairs

[#44] What is the role of the Hadoop Job object in a MapReduce application?

(A) Manages computation resources

(B) Manages task execution in MapReduce jobs

(C) Manages metadata of HDFS

(D) Executes MapReduce jobs

Correct Answer

(D) Executes MapReduce jobs

[#45] In a MapReduce job, what does the term "Combiner" represent?

(A) Combine intermediate key-value pairs on the mapper side

(B) Aggregate values on the reducer side

(C) Sort and shuffle data

(D) Distribute data to reducers

Correct Answer

(A) Combine intermediate key-value pairs on the mapper side