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

1. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT * FROM x;
B) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
C) Hive commands cannot reference an HCatalog table
D) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');

2. Which one of the following statements regarding the components of YARN is FALSE?

A) A Container executes a specific task as assigned by the ApplicationMaster
B) A client application submits a YARW job to the ResourceManager
C) The ResourceManager is responsible for scheduling and allocating resources
D) The ResourceManager monitors and restarts any failed Containers

3. Indentify the utility that allows you to create and run MapReduce jobs with any executable or script as the
mapper and/or the reducer?

A) Hadoop Streaming
B) mapred
C) Oozie
D) Flume
E) Sqoop

4. Which one of the following statements is true regarding a MapReduce job?

A) The Mapper must sort its output of (key.value) pairs in descending order based on value
B) The default Hash Partitioner sends key value pairs with the same key to the same Reducer
C) The reduce method is invoked once for each unique value
D) The job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers

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

A) 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.
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 assigns key-values pairs to reduces based on an internal random number
generator.
D) 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.
E) 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.

Solutions: