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

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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

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

1. Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?

A) Each DataNode registers with all the NameNodes.
B) DataNodes send periodic block reports to all the NameNodes.
C) Each DataNode receives commands from one designated master NameNode.
D) DataNodes send periodic heartbeats to all the NameNodes.

2. 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 DataCache and read the data into memory in the configure method of the mapper.
B) Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.
C) Place the data file in the DistributedCache and read the data into memory in the configure 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.

3. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) Each reducer generates a file sorted by age
B) The SORT BY command causes only one reducer to be used
C) The output is guaranteed to be a single file with all the data sorted by age
D) The output of each reducer is only the age column

4. You have user profile records in your OLPT database, that you want to join with web logs you have already ingested into the Hadoop file system. How will you obtain these user records?

A) Pig LOAD command
B) Sqoop import
C) Ingest with Hadoop Streaming
D) Hive LOAD DATA command
E) HDFS command
F) Ingest with Flume agents

5. 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) Neither keys nor values are in any predictable order.
C) The keys given to a reducer aren't in a predictable order, but the values associated with those keys always are.
D) Both the keys and values passed to a reducer always appear in sorted order.

Solutions: