Free Cloudera CCD-410 Exam Dumps Questions & Answers

You have the following key-value pairs as output from your Map task:
(the, 1)
(fox, 1)
(faster, 1)
(than, 1)
(the, 1)
(dog, 1)
How many keys will be passed to the Reducer's reduce method?

• A.  One
• B.  Four
• C.  Five
• D.  Three
• E.  Two
• F.  Six

You want to run Hadoop jobs on your development workstation for testing before you submit them to your production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production cluster while using a single machine?

• A.  Run the hadoop command with the -jt local and the -fs file:///options.
• B.  Run simldooop, the Apache open-source software for simulating Hadoop clusters.
• C.  Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.
• D.  Run all the nodes in your production cluster as virtual machines on your development workstation.

Your cluster's HDFS block size in 64MB. You have directory containing 100 plain text files, each of which is 100MB in size. The InputFormat for your job is TextInputFormat. Determine how many Mappers will run?

• A.  100
• B.  200
• C.  64
• D.  640

The Hadoop framework provides a mechanism for coping with machine issues such as faulty configuration or impending hardware failure. MapReduce detects that one or a number of machines are performing poorly and starts more copies of a map or reduce task. All the tasks run simultaneously and the task finish first are used. This is called:

• A.  IdentityReducer
• B.  Default Partitioner
• C.  Speculative Execution
• D.  Combine
• E.  IdentityMapper

What data does a Reducer reduce method process?

• A.  All the data in a single input file.
• B.  All data produced by a single mapper.
• C.  All data for a given value, regardless of which mapper(s) produced it.
• D.  All data for a given key, regardless of which mapper(s) produced it.