Hortonworks HADOOP-PR000007 : Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer)

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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

1. Table metadata in Hive is:

A) Stored in ZooKeeper.
B) Stored along with the data in HDFS.
C) Stored in the Metastore.
D) Stored as metadata on the NameNode.

2. You have written a Mapper which invokes the following five calls to the OutputColletor.collect method:
output.collect (new Text ("Apple"), new Text ("Red") ) ;
output.collect (new Text ("Banana"), new Text ("Yellow") ) ;
output.collect (new Text ("Apple"), new Text ("Yellow") ) ;
output.collect (new Text ("Cherry"), new Text ("Red") ) ;
output.collect (new Text ("Apple"), new Text ("Green") ) ;
How many times will the Reducer's reduce method be invoked?

A) 5
B) 1
C) 6
D) 0
E) 3

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

Which Pig statement combines A by its first field and B by its second field?

A) C = JOIN A by al, B by b2;
B) C = JOIN A SO, B $1;
C) C = DOIN B BY a1, A by b2;
D) C = JOIN A a1, B b2;

4. 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 seventeen failed task attempts
E) You will have twelve failed task attempts

5. Which best describes what the map method accepts and emits?

A) It accepts a list key-value pairs as input and can emit only one key-value pair as output.
B) It accepts a single key-value pairs as input and can emit only one key-value pair as output.
C) It accepts a single key-value pair as input and emits a single key and list of corresponding values as
output.
D) It accepts a single key-value pairs as input and can emit any number of key-value pair as output,
including zero.

Solutions: