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

2. Analyze each scenario below and indentify which best describes the behavior of the default partitioner?

A) The default partitioner computes the hash of the value and takes the mod of that value with the number
of reducers. The result determines the reducer assigned to process the key-value pair.
B) The default partitioner computes the hash of the key. Hash values between specific ranges are
associated with different buckets, and each bucket is assigned to a specific reducer.
C) The default partitioner computes the hash of the key and divides that valule modulo the number of
reducers. The result determines the reducer assigned to process the key-value pair.
D) The default partitioner implements a round-robin strategy, shuffling the key-value pairs to each reducer
in turn. This ensures an event partition of the key space.
E) The default partitioner assigns key-values pairs to reduces based on an internal random number
generator.

3. Which one of the following statements is false about HCatalog?

A) Provides a shared schema mechanism
B) Designed to be used by other programs such as Pig, Hive and MapReduce
C) Stores HDFS data in a database for performing SQL-like ad-hoc queries
D) Exists as a subproject of Hive

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 twelve failed task attempts
B) You will have seventeen failed task attempts
C) You will have forty-eight failed task attempts
D) You will have five failed task attempts
E) You will have twenty failed task attempts

5. You use the hadoop fs -put command to write a 300 MB file using and HDFS block size of 64 MB. Just
after this command has finished writing 200 MB of this file, what would another user see when trying to
access this life?

A) They would see Hadoop throw an ConcurrentFileAccessException when they try to access this file.
B) They would see no content until the whole file written and closed.
C) They would see the current of the file through the last completed block.
D) They would see the current state of the file, up to the last bit written by the command.

Solutions: