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

1. 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 end 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 beginning of the broken line.
E) Input file splits may cross line breaks. A line that crosses file splits is ignored.

2. You are developing a MapReduce job for sales reporting. The mapper will process input keys representing the year (IntWritable) and input values representing product indentifies (Text).
Indentify what determines the data types used by the Mapper for a given job.

A) The data types specified in HADOOP_MAP_DATATYPES environment variable
B) The key and value types specified in the JobConf.setMapInputKeyClass and JobConf.setMapInputValuesClass methods
C) The InputFormat used by the job determines the mapper's input key and value types.
D) The mapper-specification.xml file submitted with the job determine the mapper's input key and value types.

3. You have user profile records in your OLPT database, that you want to join with web logs you have already ingested into the Hadoop file system. How will you obtain these user records?

A) Ingest with Hadoop Streaming
B) HDFS command
C) Ingest with Flume agents
D) Hive LOAD DATA command
E) Pig LOAD command
F) Sqoop import

4. You want to Ingest log files Into HDFS, which tool would you use?

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

5. Given a directory of files with the following structure: line number, tab character, string:
Example:
1abialkjfjkaoasdfjksdlkjhqweroij
2kadfjhuwqounahagtnbvaswslmnbfgy
3kjfteiomndscxeqalkzhtopedkfsikj
You want to send each line as one record to your Mapper. Which InputFormat should you use to complete the line: conf.setInputFormat (____.class) ; ?

A) KeyValueFileInputFormat
B) BDBInputFormat
C) SequenceFileInputFormat
D) SequenceFileAsTextInputFormat

Solutions: