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Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:

1. In a MapReduce job, you want each of your input files processed by a single map task. How do you
configure a MapReduce job so that a single map task processes each input file regardless of how many
blocks the input file occupies?

A) Write a custom FileInputFormat and override the method isSplitable to always return false.
B) Write a custom MapRunner that iterates over all key-value pairs in the entire file.
C) Increase the parameter that controls minimum split size in the job configuration.
D) Set the number of mappers equal to the number of input files you want to process.

2. A NameNode in Hadoop 2.0 manages ______________.

A) No namespaces
B) A single namespace
C) An arbitrary number of namespaces
D) Two namespaces: an active namespace and a backup namespace

3. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) The output of each reducer is only the age column
B) The output is guaranteed to be a single file with all the data sorted by age
C) Each reducer generates a file sorted by age
D) The SORT BY command causes only one reducer to be used

4. Consider the following two relations, A and B.

Which Pig statement combines A by its first field and B by its second field?

A) C = JOIN A SO, B $1;
B) C = DOIN B BY a1, A by b2;
C) C = JOIN A by al, B by b2;
D) C = JOIN A a1, B b2;

5. Which YARN component is responsible for monitoring the success or failure of a Container?

A) JobTracker
B) ApplicationMaster
C) ResourceManager
D) NodeManager

Solutions: