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

1. When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?

A) When the signature of the reduce method matches the signature of the combine method.
B) When the types of the reduce operation's input key and input value match the types of the reducer's output key and output value and when the reduce operation is both communicative and associative.
C) Never. Combiners and reducers must be implemented separately because they serve different purposes.
D) Always. The point of a combiner is to serve as a mini-reducer directly after the map phase to increase performance.
E) Always. Code can be reused in Java since it is a polymorphic object-oriented programming language.

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

3. You wrote a map function that throws a runtime exception when it encounters a control character in input data. The input supplied to your mapper contains twelve such characters totals, spread across five file splits. The first four file splits each have two control characters and the last split has four control characters.
Indentify the number of failed task attempts you can expect when you run the job with mapred.max.map.attempts set to 4:

A) You will have twenty failed task attempts
B) You will have five failed task attempts
C) You will have forty-eight failed task attempts
D) You will have twelve failed task attempts
E) You will have seventeen failed task attempts

4. Which one of the following statements regarding the components of YARN is FALSE?

A) A Container executes a specific task as assigned by the ApplicationMaster
B) The ResourceManager monitors and restarts any failed Containers
C) A client application submits a YARW job to the ResourceManager
D) The ResourceManager is responsible for scheduling and allocating resources

5. Which TWO of the following statements are true regarding Hive? Choose 2 answers

A) Is a relational database
B) Offers real-time queries and row level updates
C) Useful for data analysts familiar with SQL who need to do ad-hoc queries
D) Allows you to define a structure for your unstructured Big Data

Solutions: