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

1. What does Pig provide to the overall Hadoop solution?

A) Legacy language Integration with MapReduce framework
B) C++ interface to MapReduce and data warehouse infrastructure
C) Database table and storage management services
D) Simple scripting language for writing MapReduce programs

2. What is a SequenceFile?

A) 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.
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 of WritableComparable objects, in
sorted order.

3. In a MapReduce job with 500 map tasks, how many map task attempts will there be?

A) At most 500.
B) Between 500 and 1000.
C) Exactly 500.
D) At least 500.
E) It depends on the number of reduces in the job.

4. Which HDFS command uploads a local file X into an existing HDFS directory Y?

A) hadoop fs-put X Y
B) hadoop scp X Y
C) hadoop fs -localPut X Y
D) hadoop fs -get X Y

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

Solutions: