which major functions of the JobTracker into separate daemons?
MapReduce v2 (MRv2/YARN) splits which major functions of the JobTracker into separate
daemons? Select two.
What types of algorithms are difficult to express in MapReduce v1 (MRv1)?
What types of algorithms are difficult to express in MapReduce v1 (MRv1)?
What does calling the next () method return?
In the reducer, the MapReduce API provides you with an iterator over Writable values. What does
calling the next () method return?
Table metadata in Hive is:
Table metadata in Hive is:
which best describes the behavior of the default partitioner?
Analyze each scenario below and indentify which best describes the behavior of the default
partitioner?
Which action should you take to relieve this situation and store more files in HDFS?
You need to move a file titled “weblogs” into HDFS. When you try to copy the file, you can’t. You
know you have ample space on your DataNodes. Which action should you take to relieve this
situation and store more files in HDFS?
how many distinct copy operations will there be in the sort/shuffle phase?
In a large MapReduce job with m mappers and n reducers, how many distinct copy operations will
there be in the sort/shuffle phase?
Workflows expressed in Oozie can contain:
Workflows expressed in Oozie can contain:
what the map method accepts and emits?
Which best describes what the map method accepts and emits?
When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?
When can a reduce class also serve as a combiner without affecting the output of a MapReduce
program?