Identify the tool best suited to import a portion of a relational database every day as files into
HDFS, and generate Java classes to interact with that imported data?

You use the hadoop fs –put command to write a 300 MB file using and HDFS block size of 64 MB.
Just after this command has finished writing 200 MB of this file, what would another user see
when trying to access this life?

What types of algorithms are difficult to express MapReduce?

In a MapReduce job with 500 map tasks, how many map task attempts will there be?

You write MapReduce job to process 100 files in HDFS. Your MapReduce algorithm uses
TextInputFormat: the mapper applies a regular expression over input values and emits key-values
pairs with the key consisting of the matching text, and the value containing the filename and byte
offset. Determine the difference between setting the number of reduces to one and settings the
number of reducers to zero.

Which of the following best describes the map method input and output?

Does the MapReduce programming model provide a way for reducers to communicate with each
other?

Your Custer’s HOFS block size is 64MB. You have a directory containing 100 plain text files, each
of which Is 100MB in size. The InputFormat for your job is TextInputFormat. How many Mappers
will run?

Table metadata in Hive is:

MapReduce v2 (MRv2/YARN) splits which major functions of the JobTracker into separate
daemons? Select two.