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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

1. What is the term for the process of moving map outputs to the reducers?

A) Partitioning
B) Shuffling and sorting
C) Combining
D) Reducing

2. All keys used for intermediate output from mappers must:

A) Be a subclass of FileInputFormat.
B) Implement a comparator for speedy sorting.
C) Implement WritableComparable.
D) Override isSplitable.
E) Implement a splittable compression algorithm.

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

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

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

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

Solutions: