Which happens if the NameNode crashes?
Which happens if the NameNode crashes?
What is the standard configuration of slave nodes in a Hadoop cluster?
What is the standard configuration of slave nodes in a Hadoop cluster?
Which MapReduce daemon runs on each slave node and participates in job execution?
Which MapReduce daemon runs on each slave node and participates in job execution?
what the map method accepts and emits?
Which best describes what the map method accepts and emits?
Workflows expressed in Oozie can contain:
Workflows expressed in Oozie can contain:
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?
What is a Writable?
What is a Writable?
which node will Hadoop first attempt to run the Map task?
You are running a job that will process a single InputSplit on a cluster which has no other jobs
currently running. Each node has an equal number of open Map slots. On which node will Hadoop
first attempt to run the Map task?
What is a SequenceFile?
What is a SequenceFile?
Which format should you use to store this data in HDFS?
You want to perform analysis on a large collection of images. You want to store this data in HDFS
and process it with MapReduce but you also want to give your data analysts and data scientists
the ability to process the data directly from HDFS with an interpreted high-level programming
language like Python. Which format should you use to store this data in HDFS?