The OOP Quiz

Which of these is not one of the primary principles of object-oriented programming?

• Encapsulation

• Polymorphism

• Generalisation

• Inheritance

Why are encapsulation and abstraction important?

• They allow you to reuse code

• Change implementation details without affecting other code that uses the class

• Create other classes that use the same properties and methods

• Reduce problems into more manageable parts

How do properties enable a class to meet the goals of encapsulation?

• They provide a public way to access a private field

• They make all data private

• They make all data public

• They represent data associated with a class

What type of inheritance does C# support?

• Single and Multiple Inheritance

• Multiple Inheritance

• Single Inheritance only

What is polymorphism?

• Where information is hidden

• Where information is shared with other classes

• The capability of one type to be used like another type

• A new class that inherits properties and methods from its parent.

What are the types of control flow statements available in C#?

• Sequence, Selection & Iteration

• Iteration, Sequence & Jump

• Jump, Selection & Sequence

• Selection, Iteration & Jump

What is the difference between the while and do statements?

• While is bottom-tested do is top-tested

• While is top-tested, do is bottom-tested

• Do loops may never be executed

• While statements will always be executed at least once

How many default cases can a switch statement have?

• One

• Two

• At least one

• As many as you need

Which operator is used to concatenate strings?

• +

• -

• /

• %

What does the StringBuilder class do?

• Makes all strings immutable

• Creates temporary strings

• Creates mutable strings

• Manipulates immutable strings