Point out the correct statement.
A. The sequence file also can contain a "secondary" key-value list that can be used as file Metadata
B. SequenceFile formats share a header that contains some information which allows the reader to recognize is format
C. There're Key and Value Class Name's that allow the reader to instantiate those classes, via reflection, for reading
D. All of the mentioned
Answer: Option D
This Question Belongs to Hadoop >> Hadoop Input Output Operations
What is the purpose of the Hadoop InputFormat?
A. Defines how input data is read
B. Defines the map output format
C. Defines the reduce output format
D. Defines the partitioning logic
In Hadoop, what is the primary role of the RecordReader?
A. Manages computation resources
B. Reads and parses input data
C. Executes MapReduce jobs
D. Manages Hadoop ecosystem tools
What is the significance of the Hadoop OutputFormat?
A. Manage storage layer
B. Manage computation resources
C. Execute MapReduce jobs
D. Manage Hadoop ecosystem tools
In Hadoop MapReduce, what is the role of the CombineFileInputFormat?
A. Combine intermediate key-value pairs on the mapper side
B. Distribute data to reducers
C. Aggregate values on the reducer side
D. Sort and shuffle data
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