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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. Given the following Hive commands:

Which one of the following statements Is true?

A) The file mydata.txt is copied to a subfolder of /apps/hive/warehouse
B) The file mydata.txt is moved to a subfolder of /apps/hive/warehouse
C) The file mydata.txt is copied into Hive's underlying relational database 0.
D) The file mydata.txt does not move from Its current location in HDFS

2. You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?

A) Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer
B) Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.
C) Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.
D) Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.
E) Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.

3. In Hadoop 2.0, which one of the following statements is true about a standby NameNode?
The Standby NameNode:

A) Receives the same block reports as the active NameNode.
B) Communicates directly with the active NameNode to maintain the state of the active NameNode.
C) Runs on the same machine and shares the memory of the active NameNode.
D) Processes all client requests and block reports from the appropriate DataNodes.

4. You have a directory named jobdata in HDFS that contains four files: _first.txt, second.txt, .third.txt and #data.txt. How many files will be processed by the FileInputFormat.setInputPaths () command when it's given a path object representing this directory?

A) None, the directory cannot be named jobdata
B) Three, the pound sign is an invalid character for HDFS file names
C) Four, all files will be processed
D) One, no special characters can prefix the name of an input file
E) Two, file names with a leading period or underscore are ignored

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

A Pig JOIN statement that combined relations A by its first field and B by its second field would produce what output?

A) 2 cherry Jim, Chris 3 orange Terry 4 peach Brian
B) 2 cherry 2 cherry 3 orange 4 peach
C) 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
D) 2 Jim Chris 2 3 Terry 3 4 Brian 4

Solutions: