Multiple Choice
Which process describes the lifecycle of a Mapper?
A) The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.
B) The TaskTracker spawns a new Mapper to process all records in a single input split.
C) The TaskTracker spawns a new Mapper to process each key-value pair.
D) The JobTracker spawns a new Mapper to process all records in a single file.
Correct Answer:
Verified
Correct Answer:
Verified
Q11: In a large MapReduce job with m
Q12: The Hadoop framework provides a mechanism for
Q13: For each input key-value pair, mappers can
Q14: You want to perform analysis on a
Q15: Given a directory of files with the
Q17: You have written a Mapper which invokes
Q18: Identify the MapReduce v2 (MRv2 / YARN)
Q19: To process input key-value pairs, your mapper
Q20: What types of algorithms are difficult to
Q21: You need to move a file titled