Learn C++ Online

This lesson contains approximately 20 minutes of video content.

Abstraction

What exactly is a user-defined type?

Interfaces

Why user-defined types?

Questions

QLAIUDT Q1

This question is ungraded.

According to the lesson video, why are user-defined types helpful? Select the best answer.

Types are easy to use.

Types are useless, though fun to implement!

Types indicate that some information is more important than other information.

Types provide representation and operations for objects.

Practice question: try as many times as you like

QLAIUDT Q2

This question is ungraded.

Which of the following should not be a user-defined type? Select the best answer.

Calendar entry.

Is snowing.

Meeting notes.

Student profile.

Practice question: try as many times as you like

QLAIUDT Q3

This question is ungraded.

In the C++ programming language, which of the following is not an example of an encapsulation mechanism? Select the best answer.

Class

Function

Return

`std::vector`

Practice question: try as many times as you like

QLAIUDT Q4

This question is ungraded.

Which of the following statements best motivates information hiding? Select the best answer.

Allows the user to disregard any invariants maintained by type.

Ensures private helper functions are callable outside the scope of the class.

Makes the internal representation directly accessible to the user.

Separates how to use (what we do) from implementation details (what happens).

Practice question: try as many times as you like

QLAIUDT Q5

This question is ungraded.

Which of the following might be considered the main focus of object-oriented programming? Select the best answer.

Base program design around functions, without regard to objects.

Building reclusive objects that avoid interacting with other objects.

Building user-defined types that do not maintain any invariants.

Message passing between objects.

Practice question: try as many times as you like

Language agnostic introduction to user-defined types

Abstraction

What exactly is a user-defined type?

Interfaces

Why user-defined types?

Questions

Q1

QLAIUDT Q1

Q2

QLAIUDT Q2

Q3

QLAIUDT Q3

Q4

QLAIUDT Q4

Q5

QLAIUDT Q5