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

1. In the reducer, the MapReduce API provides you with an iterator over Writable values. What does calling
the next () method return?

A) It returns a reference to a Writable object from an object pool.
B) It returns a reference to the same Writable object if the next value is the same as the previous value, or
a new Writable object otherwise.
C) It returns a reference to a different Writable object time.
D) It returns a reference to the same Writable object each time, but populated with different data.
E) It returns a reference to a Writable object. The API leaves unspecified whether this is a reused object
or a new object.

2. You need to move a file titled "weblogs" into HDFS. When you try to copy the file, you can't. You know you
have ample space on your DataNodes. Which action should you take to relieve this situation and store
more files in HDFS?

A) Increase the block size on all current files in HDFS.
B) Increase the amount of memory for the NameNode.
C) Increase the block size on your remaining files.
D) Decrease the block size on your remaining files.
E) Increase the number of disks (or size) for the NameNode.
F) Decrease the block size on all current files in HDFS.

3. Examine the following Hive statements:

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

A) The contents of File1 are parsed as comma-delimited rows and loaded into /user/joe/x/
B) Hive reformats File1 into a structure that Hive can access and moves into to/user/joe/x/
C) The contents of File1 are parsed as comma-delimited rows and stored in a database
D) The file named File1 is moved to to/user/joe/x/

4. MapReduce v2 (MRv2/YARN) is designed to address which two issues?

A) Single point of failure in the NameNode.
B) HDFS latency.
C) Ability to run frameworks other than MapReduce, such as MPI.
D) Reduce complexity of the MapReduce APIs.
E) Resource pressure on the JobTracker.
F) Standardize on a single MapReduce API.

5. Which of the following tool was designed to import data from a relational database into HDFS?

A) Ambari
B) Sqoop
C) HCatalog
D) Flume

Solutions: