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

1. Which HDFS command displays the contents of the file x in the user's HDFS home directory?

A) hdfs fs -get x
B) hadoop fs -cat x
C) hadoop fs -Is x
D) hadoop fs -cp x

2. Determine which best describes when the reduce method is first called in a MapReduce job?

A) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The reduce method is called as soon as the intermediate key-value pairs start to arrive.
B) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The programmer can configure in the job what percentage of the intermediate data should arrive before
the reduce method begins.
C) Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed.
The reduce method is called only after all intermediate data has been copied and sorted.
D) Reduce methods and map methods all start at the beginning of a job, in order to provide optimal
performance for map-only or reduce-only jobs.

3. What does Pig provide to the overall Hadoop solution?

A) C++ interface to MapReduce and data warehouse infrastructure
B) Database table and storage management services
C) Legacy language Integration with MapReduce framework
D) Simple scripting language for writing MapReduce programs

4. Examine the following Hive statements:

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

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

5. A NameNode in Hadoop 2.0 manages ______________.

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

Solutions: