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

1. Which best describes what the map method accepts and emits?

A) It accepts a single key-value pair as input and emits a single key and list of corresponding values as
output.
B) It accepts a single key-value pairs as input and can emit only one key-value pair as output.
C) It accepts a single key-value pairs as input and can emit any number of key-value pair as output,
including zero.
D) It accepts a list key-value pairs as input and can emit only one key-value pair as output.

2. All keys used for intermediate output from mappers must:

A) Implement a splittable compression algorithm.
B) Be a subclass of FileInputFormat.
C) Implement WritableComparable.
D) Implement a comparator for speedy sorting.
E) Override isSplitable.

3. Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A) The ApplicationMaster starts an instance of the ResourceManager within each Container
B) The ApplicationMaster starts a single instance of the ResourceManager
C) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
D) The ApplicationMaster requests resources from the ResourceManager

4. Which one of the following statements describes a Pig bag. tuple, and map, respectively?

A) Unordered collection of maps, ordered collection of tuples, ordered set of key/value pairs
B) Ordered collection of maps, ordered collection of bags, and unordered set of key/value pairs
C) Unordered collection of tuples, ordered set of fields, set of key value pairs
D) Ordered set of fields, ordered collection of tuples, ordered collection of maps

5. A client application creates an HDFS file named foo.txt with a replication factor of 3. Identify which best
describes the file access rules in HDFS if the file has a single block that is stored on data nodes A, B and
C?

A) Each data node locks the local file to prohibit concurrent readers and writers of the file.
B) The file can be accessed if at least one of the data nodes storing the file is available.
C) Each data node stores a copy of the file in the local file system with the same name as the HDFS file.
D) The file will be marked as corrupted if data node B fails during the creation of the file.

Solutions: