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

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

2. Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and
generate Java classes to interact with that imported data?

A) fuse-dfs
B) Flume
C) Pig
D) Oozie
E) Hue
F) Sqoop
G) Hive

3. For each input key-value pair, mappers can emit:

A) As many intermediate key-value pairs as designed, as long as all the keys have the same types and all
the values have the same type.
B) One intermediate key-value pair, but of the same type.
C) One intermediate key-value pair, of a different type.
D) As many intermediate key-value pairs as designed. There are no restrictions on the types of those
key-value pairs (i.e., they can be heterogeneous).
E) As many intermediate key-value pairs as designed, but they cannot be of the same type as the input
key-value pair.

4. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.
B) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order
C) Both the keys and values passed to a reducer always appear in sorted order.
D) Neither keys nor values are in any predictable order.

5. MapReduce v2 (MRv2/YARN) splits which major functions of the JobTracker into separate daemons?
Select two.

A) Managing file system metadata
B) Managing tasks
C) MapReduce metric reporting
D) Job scheduling/monitoring
E) Heath states checks (heartbeats)
F) Job coordination between the ResourceManager and NodeManager
G) Resource management
H) Launching tasks

Solutions: