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

1. Which one of the following statements is true about a Hive-managed table?

A) Records can only be added to the table using the Hive INSERT command.
B) When the table is dropped, the underlying folder in HDFS is deleted.
C) Hive dynamically defines the schema of the table based on the FROM clause of a SELECT query.
D) Hive dynamically defines the schema of the table based on the format of the underlying data.

2. You are developing a combiner that takes as input Text keys, IntWritable values, and emits Text keys, IntWritable values. Which interface should your class implement?

A) Reducer <Text, IntWritable, Text, IntWritable>
B) Mapper <Text, IntWritable, Text, IntWritable>
C) Combiner <Text, Text, IntWritable, IntWritable>
D) Combiner <Text, IntWritable, Text, IntWritable>
E) Reducer <Text, Text, IntWritable, IntWritable>

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

4. Given the following Hive command:
INSERT OVERWRITE TABLE mytable SELECT * FROM myothertable;
Which one of the following statements is true?

A) Any existing data in mytable will be overwritten
B) The statement is not a valid Hive command
C) The contents of myothertable are appended to mytable
D) A new table named mytable is created, and the contents of myothertable are copied into mytable

5. Which process describes the lifecycle of a Mapper?

A) The JobTracker spawns a new Mapper to process all records in a single file.
B) The TaskTracker spawns a new Mapper to process each key-value pair.
C) The TaskTracker spawns a new Mapper to process all records in a single input split.
D) The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.

Solutions: