Hortonworks Apache-Hadoop-Developer : Hadoop 2.0 Certification exam for Pig and Hive Developer

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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) The keys given to a reducer aren't in a predictable order, but the values associated with those keys always are.
B) Both the keys and values passed to a reducer always appear in sorted order.
C) The keys given to a reducer are in sorted order but the values associated with each key are in no predictable order
D) Neither keys nor values are in any predictable order.

2. Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and generate Java classes to interact with that imported data?

A) Pig
B) Flume
C) Hive
D) fuse-dfs
E) Hue
F) Sqoop
G) Oozie

3. Which HDFS command copies an HDFS file named foo to the local filesystem as localFoo?

A) hadoop fs -put foo LocalFoo
B) hadoop fs -Is foo
C) hadoop -cp foo LocalFoo
D) hadoop fs -get foo LocalFoo

4. What are the TWO main components of the YARN ResourceManager process? Choose 2 answers

A) Job Tracker
B) Scheduler
C) Applications Manager
D) Task Tracker

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

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

Solutions: