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

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

3. You need to move a file titled "weblogs" into HDFS. When you try to copy the file, you can't. You know you
have ample space on your DataNodes. Which action should you take to relieve this situation and store
more files in HDFS?

A) Increase the block size on your remaining files.
B) Decrease the block size on all current files in HDFS.
C) Increase the block size on all current files in HDFS.
D) Increase the number of disks (or size) for the NameNode.
E) Decrease the block size on your remaining files.
F) Increase the amount of memory for the NameNode.

4. You want to populate an associative array in order to perform a map-side join. You've decided to put this
information in a text file, place that file into the DistributedCache and read it in your Mapper before any
records are processed. Indentify which method in the Mapper you should use to implement code for
reading the file and populating the associative array?

A) combine
B) init
C) configure
D) map

5. Which one of the following statements describes the relationship between the NodeManager and the
ApplicationMaster?

A) The NodeManager requests resources from the ApplicationMaster
B) The NodeManager creates an instance of the ApplicationMaster
C) The ApplicationMaster starts the NodeManager in a Container
D) The ApplicationMaster starts the NodeManager outside of a Container

Solutions: