Point out the correct statement.
A) mapper maps input key/value pairs to a set of intermediate key/value pairs
B) applications typically implement the mapper and reducer interfaces to provide the map and reduce methods
C) mapper and reducer interfaces form the core of the job
D) none of the mentioned
Correct Answer:
Verified
Q38: Sun also has the Hadoop Live CD
Q39: Hadoop achieves reliability by replicating the data
Q40: What was Hadoop written in?
A)java (software platform)
B)perl
C)java
Q41: The Hadoop list includes the HBase database,
Q42: The Mapper implementation processes one line at
Q44: The Hadoop MapReduce framework spawns one map
Q45: Users can control which keys (and hence
Q46: Point out the wrong statement.
A)the mapper outputs
Q47: Applications can use the _ to report progress
Q48: The right level of parallelism for maps
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