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

1. Examine the following Pig commands:

Which one of the following statements is true?

A) A random sample of approximately 20% of the data will be output
B) Each MapReduce task will terminate after executing for 0.2 minutes
C) The SAMPLE command generates an "unexpected symbol" error
D) The reducers will only output the first 20% of the data passed from the mappers

2. Which one of the following classes would a Pig command use to store data in a table defined in
HCatalog?

A) Pig scripts cannot use an HCatalog table
B) No special class is needed for a Pig script to store data in an HCatalog table
C) org.apache.hcatalog.pig.HCatOutputFormat
D) org.apache.hcatalog.pig.HCatStorer

3. What is a SequenceFile?

A) A SequenceFile contains a binary encoding of an arbitrary number of homogeneous writable objects.
B) A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous writable objects.
C) A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in
sorted order.
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 same type.

4. 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

5. What does the following WebHDFS command do?
Curl -1 -L "http://host:port/webhdfs/v1/foo/bar?op=OPEN"

A) Delete a directory /foo/bar
B) List a directory /foo
C) Make a directory /foo/bar
D) Read a file /foo/bar

Solutions: