APCSP Abstraction Concepts 3

Question 1

Which of the following is NOT a benefit of using abstractions in programming?

Accepted Answer

Eliminating all possible bugs automatically

Answer

Abstraction helps manage complexity and reuse code, but it does not automatically eliminate bugs.

Question 2

The Internet Protocol (IP) is an abstraction that lets applications send data without worrying about the physical network. Which layer of the internet abstraction stack does IP belong to?

Accepted Answer

Internet layer

Answer

IP operates at the internet (network) layer, abstracting physical routing from applications.

Question 3

A programmer writes a `Car` object with properties `speed` and `fuel` and a method `accelerate()`. Users of the object call `accelerate()` without knowing the engine physics. This is an example of:

Accepted Answer

Object abstraction / encapsulation

Answer

Encapsulating data and behavior inside an object and exposing only a method is a form of abstraction.

Question 4

What does it mean for an abstraction to 'leak'?

Accepted Answer

Details that should be hidden become visible and must be handled by the user

Answer

A leaky abstraction is one where hidden implementation details surface and the caller must deal with them.

Question 5

In AP CSP, which of the following best represents a 'high-level' abstraction compared to a 'low-level' one?

Accepted Answer

Python code vs. machine code

Answer

Python is a high-level abstraction that hides the machine code a computer actually executes.

(APCSP) AP Computer Science Principles Practice Test

(APCSP) AP Computer Science Principles Practice Test

APCSP Abstraction Concepts 3