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

1. Your client application submits a MapReduce job to your Hadoop cluster. Identify the Hadoop daemon on
which the Hadoop framework will look for an available slot schedule a MapReduce operation.

A) NameNode
B) JobTracker
C) Secondary NameNode
D) DataNode
E) TaskTracker

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

3. You have just executed a MapReduce job. Where is intermediate data written to after being emitted from
the Mapper's map method?

A) Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into
HDFS.
B) Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into
HDFS.
C) Into in-memory buffers that spill over to the local file system of the TaskTracker node running the
Mapper.
D) Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node
running the Reducer
E) Intermediate data in streamed across the network from Mapper to the Reduce and is never written to
disk.

4. In Hadoop 2.0, which TWO of the following processes work together to provide automatic failover of the
NameNode? Choose 2 answers

A) JournalNode
B) ZooKeeper
C) ZKFailoverController
D) QuorumManager

5. Which one of the following files is required in every Oozie Workflow application?

A) Workflow.xml
B) Oozie.xml
C) job.properties
D) Config-default.xml

Solutions: