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

1. Examine the following Hive statements:

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

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

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

3. Which best describes how TextInputFormat processes input files and line breaks?

A) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.
B) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.
C) The input file is split exactly at the line breaks, so each RecordReader will read a series of complete lines.
D) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.
E) Input file splits may cross line breaks. A line that crosses file splits is ignored.

4. Which one of the following statements describes a Hive user-defined aggregate function?

A) Operates on a single input row and produces a table as output
B) Operates on multiple input rows and produces a table as output
C) Operates on multiple input rows and creates a single row as output
D) Operates on a single input row and produces a single row as output

5. Which one of the following classes would a Pig command use to store data in a table defined in HCatalog?

A) org.apache.hcatalog.pig.HCatStorer
B) org.apache.hcatalog.pig.HCatOutputFormat
C) Pig scripts cannot use an HCatalog table
D) No special class is needed for a Pig script to store data in an HCatalog table

Solutions: