Which of the Following Statements A), B) or C) Is

question 51

Multiple Choice

Which of the following statements a) , b) or c) is false?

• A) By default, Hadoop expects the mapper's output and the reducer's input and output to be in the form of key-value pairs separated by a tab.
• B) In a mapper script, the notation #!/usr/bin/env python3 tells Hadoop to execute the Python code using python3. This line must come before all other comments and code in the file.
• C) At the time of this writing, Microsoft HDInsight clusters contain Python 2.7.12 and Python 3.5.2, so you can use f-strings in your code.
• D) All of the above statements are true.

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Definitions:

Base Classes

In object-oriented programming, classes that act as a foundation from which other classes (derived or child classes) can be created through inheritance.

Interface

A programming construct that defines a contract of methods that implementing classes must provide, used to enforce a set of behaviors.

Comparable Interface

An interface in Java that imposes a natural ordering on the objects of each class that implements it, used to allow objects to be compared.

Java.util

The java.util package provides a collection of utility classes that are useful for tasks involving collections, dates, and system properties.