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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:

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

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

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

2. You need to run the same job many times with minor variations. Rather than hardcoding all job
configuration options in your drive code, you've decided to have your Driver subclass
org.apache.hadoop.conf.Configured and implement the org.apache.hadoop.util.Tool interface.
Indentify which invocation correctly passes.mapred.job.name with a value of Example to Hadoop?

A) hadoop setproperty mapred.job.name=Example MyDriver input output
B) hadoop setproperty ("mapred.job.name=Example") MyDriver input output
C) hadoop MyDriver mapred.job.name=Example input output
D) hadoop MyDrive -D mapred.job.name=Example input output
E) hadoop "mapred.job.name=Example" MyDriver input output

3. A client application creates an HDFS file named foo.txt with a replication factor of 3. Identify which best
describes the file access rules in HDFS if the file has a single block that is stored on data nodes A, B and
C?

A) Each data node stores a copy of the file in the local file system with the same name as the HDFS file.
B) The file will be marked as corrupted if data node B fails during the creation of the file.
C) Each data node locks the local file to prohibit concurrent readers and writers of the file.
D) The file can be accessed if at least one of the data nodes storing the file is available.

4. 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) DataNode
C) JobTracker
D) TaskTracker
E) Secondary NameNode

5. Examine the following Pig commands:

Which one of the following statements is true?

A) A random sample of approximately 20% of the data will be output
B) The SAMPLE command generates an "unexpected symbol" error
C) The reducers will only output the first 20% of the data passed from the mappers
D) Each MapReduce task will terminate after executing for 0.2 minutes

Solutions: