wgu c173 scripting and programming – foundations final pre assessment 20222023 detailed questions and answersa graded
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WGU C173 SCRIPTING AND PROGRAMMING – FOUNDATIONS FINAL
PRE-ASSESSMENT 2022/2023 DETAILED QUESTIONS AND ANSWERS
What is a compiled programming language? (correct answers)You write your source code and then a
compiler goes through the code and creates a separate file that contains the machine code. This
separate file is an executable file because the computer can directly execute it. All of the code is
converted at once and the new compiled file is no longer editable.
What is an interpreted programming language? (correct answers)An interpreted language does the
conversion from source code to machine code on-the- fly. There is no separate machine code file. The
computer executes each line when it is needed. This means that all of the code is saved in a format that
is editable programming language.
What is the main difference in compiled and interpreted code? (correct answers)The main difference is
when the code is converted to machine language. A compiled language converts all of the code at one
time, before the code is run by the machine, and saves this into a new file. That new file is now machine
code, and is not editable. An interpreted language still needs to convert to machine language in order
for the computer to understand it, but it does this at the time that the code is executed. The original
programming language is preserved, so it is editable.
What is an object? (correct answers)Something that has its own identity and characteristics, separate
from other objects.
What three things describe an object in object-oriented programming languages? (correct
answers)identity, attributes, and behavior
What is a class? (correct answers)A class describes what an object will be, but it isn't the object itself. A
class is a blueprint, a detailed description, a definition of an object.
Why would we create a class? (correct answers)To create a blueprint upon which to build multiple
objects that share attributes and behaviors.
,What is the difference in an object and a class? (correct answers)An object is something that has its own
identify and characteristics, separate from other objects. A class describes that object will be, but it isn't
the object itself. For example, a house is an object and the blueprints used to create it would be
considered the class.
What is instantiation? (correct answers)Creating instances of a class
What is abstraction? (correct answers)Focus on the essential qualities of something rather than one
specific example. For example, if I say a table you have an idea of what I mean even though I didn't say if
it was wood/glass or big/small. This is the essential idea behind creating classes.
What is encapsulation? (correct answers)Surrounding something, not just to keep the contents
together, but also to protect those contents. Restricts access to the inner workings of a class or any
objects based on that class; this is referred to as information hiding or data hiding.
What is inheritance? (correct answers)A form of code reuse.
How does inheritance apply to working with classes? (correct answers)We can create a new class, but
instead of writing it from scratch, we can base it on an existing class. It would inherit some of the
characteristics of the base class but could also have its own unique properties and methods that are not
shared with the base class.
What is polymorphism? How does polymorphism apply to working with classes? (correct
answers)Means many forms. It lets us automatically do the correct behavior even if what we're working
with could take one of many different forms. The + is a great example. If we're adding two variables
together with the plus sign, and these variables are integers, it will numerically add them. But if they are
two strings it will concatenate them. With classes this allows us to work with objects created from
different classes.
How do you define a class in Python? (correct answers)The syntax for creating a class in Python is:
class <ClassName> (<BaseClass>):
, <Block>
What is a programming library? (correct answers)A programming library is simply code that is already
written, already tested, and ready for you to link to and use.
Why are libraries useful? (correct answers)These can greatly reduce the amount of time to write code.
What does it mean if a programming language is object oriented? (correct answers)An object oriented
programming language that is organized around objects or classes, rather than "actions". Object-
oriented programming takes the view that what we really care about are the objects we want to
manipulate rather than the logic required to manipulate them.
Which of these programs is object-oriented (correct answers)Java, .NET & C#, Ruby, Python, Objective-C
What is this programming languages best used for: C (correct answers)C - games, utilities, embedded
systems, operating systems
What is this programming languages best used for: Java (correct answers)Java - cross-platform language,
used for desktop applications and android mobile applications
What is this programming languages best used for: .NET (correct answers):.NET - windows platforms -
desktop, mobile, or web
What is this programming languages best used for: C# sharp (correct answers)C# sharp - windows
platforms - desktop, mobile, or web
What is this programming languages best used for: Ruby (correct answers)Ruby - cross-platform
language, used for small utilities and web apps
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