Point out the wrong statement.
A) the mapper outputs are sorted and then partitioned per reducer
B) the total number of partitions is the same as the number of reduce tasks for the job
C) the intermediate, sorted outputs are always stored in a simple (key-len, key, value-len, value) format
D) none of the mentioned
Correct Answer:
Verified
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
Q43: Point out the correct statement.
A)mapper maps input
Q44: The Hadoop MapReduce framework spawns one map
Q45: Users can control which keys (and hence
Q47: Applications can use the _ to report progress
Q48: The right level of parallelism for maps
Q49: The number of reduces for the job
Q50: The framework groups Reducer inputs by key
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