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

1. Which two of the following statements are true about Pig's approach toward data? Choose 2 answers

A) Accepts only data that has a key/value pair structure
B) Accepts data whether it has metadata or not
C) Accepts tab-delimited text data only
D) Accepts any data: structured or unstructured
E) Accepts only data that is defined by metadata tables stored in a database

2. Workflows expressed in Oozie can contain:

A) Sequences of MapReduce job only; on Pig on Hive tasks or jobs. These MapReduce sequences can
be combined with forks and path joins.
B) Iterntive repetition of MapReduce jobs until a desired answer or state is reached.
C) Sequences of MapReduce and Pig. These sequences can be combined with other actions including
forks, decision points, and path joins.
D) Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with
exception handlers but no forks.

3. Which one of the following statements is true about a Hive-managed table?

A) When the table is dropped, the underlying folder in HDFS is deleted.
B) Records can only be added to the table using the Hive INSERT command.
C) Hive dynamically defines the schema of the table based on the format of the underlying data.
D) Hive dynamically defines the schema of the table based on the FROM clause of a SELECT query.

4. Which HDFS command copies an HDFS file named foo to the local filesystem as localFoo?

A) hadoop fs -put foo LocalFoo
B) hadoop fs -Is foo
C) hadoop -cp foo LocalFoo
D) hadoop fs -get foo LocalFoo

5. Which describes how a client reads a file from HDFS?

A) The client contacts the NameNode for the block location(s). The NameNode then queries the
DataNodes for block locations. The DataNodes respond to the NameNode, and the NameNode redirects
the client to the DataNode that holds the requested data block(s). The client then reads the data directly
off the DataNode.
B) The client queries all DataNodes in parallel. The DataNode that contains the requested data responds
directly to the client. The client reads the data directly off the DataNode.
C) The client queries the NameNode for the block location(s). The NameNode returns the block location(s)
to the client. The client reads the data directory off the DataNode(s).
D) The client contacts the NameNode for the block location(s). The NameNode contacts the DataNode
that holds the requested data block. Data is transferred from the DataNode to the NameNode, and then
from the NameNode to the client.

Solutions: