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

1. To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the best way to accomplish this?

A) Place the data file in the DistributedCache and read the data into memory in the configure method of the mapper.
B) Place the data file in the DataCache and read the data into memory in the configure method of the mapper.
C) Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.
D) Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper.

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

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

3. Given the following Pig commands:

Which one of the following statements is true?

A) The $1 variable represents the second column of data in 'my.log'
B) The severe relation is not valid
C) The $1 variable represents the first column of data in 'my.log'
D) The grouped relation is not valid

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

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

5. Which YARN component is responsible for monitoring the success or failure of a Container?

A) NodeManager
B) ResourceManager
C) ApplicationMaster
D) JobTracker

Solutions: