Hortonworks 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:

Question #1
You have a directory named jobdata in HDFS that contains four files: _first.txt, second.txt, .third.txt and #data.txt. How many files will be processed by the FileInputFormat.setInputPaths () command when it's given a path object representing this directory?

A. Three, the pound sign is an invalid character for HDFS file names
B. None, the directory cannot be named jobdata
C. Four, all files will be processed
D. Two, file names with a leading period or underscore are ignored
E. One, no special characters can prefix the name of an input file

Question #2
Your cluster's HDFS block size in 64MB. You have directory containing 100 plain text files, each of which is 100MB in size. The InputFormat for your job is TextInputFormat. Determine how many Mappers will run?

A. 640
B. 200
C. 64
D. 100

Question #3
What types of algorithms are difficult to express in MapReduce v1 (MRv1)?

A. Algorithms that require applying the same mathematical function to large numbers of individual binary records.
B. Algorithms that require global, sharing states.
C. Relational operations on large amounts of structured and semi-structured data.
D. Text analysis algorithms on large collections of unstructured text (e.g, Web crawls).
E. Large-scale graph algorithms that require one-step link traversal.

Question #4
Which one of the following statements describes a Hive user-defined aggregate function?

A. Operates on multiple input rows and creates a single row as output
B. Operates on a single input row and produces a table as output
C. Operates on multiple input rows and produces a table as output
D. Operates on a single input row and produces a single row as output

Question #5
Given the following Hive commands:

Which one of the following statements Is true?

A. The file mydata.txt does not move from Its current location in HDFS
B. The file mydata.txt is moved to a subfolder of /apps/hive/warehouse
C. The file mydata.txt is copied into Hive's underlying relational database 0.
D. The file mydata.txt is copied to a subfolder of /apps/hive/warehouse

Solutions: