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

1. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) The SORT BY command causes only one reducer to be used
B) The output of each reducer is only the age column
C) The output is guaranteed to be a single file with all the data sorted by age
D) Each reducer generates a file sorted by age

2. In Hadoop 2.0, which one of the following statements is true about a standby NameNode?
The Standby NameNode:

A) Runs on the same machine and shares the memory of the active NameNode.
B) Communicates directly with the active NameNode to maintain the state of the active NameNode.
C) Receives the same block reports as the active NameNode.
D) Processes all client requests and block reports from the appropriate DataNodes.

3. What types of algorithms are difficult to express in MapReduce v1 (MRv1)?

A) Relational operations on large amounts of structured and semi-structured data.
B) Algorithms that require applying the same mathematical function to large numbers of individual binary
records.
C) Algorithms that require global, sharing states.
D) Large-scale graph algorithms that require one-step link traversal.
E) Text analysis algorithms on large collections of unstructured text (e.g, Web crawls).

4. What is the term for the process of moving map outputs to the reducers?

A) Shuffling and sorting
B) Reducing
C) Partitioning
D) Combining

5. Indentify which best defines a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in
sorted order.
B) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects
C) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
D) A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be
the same type. Each value must be the same type.

Solutions: