APCSP Abstraction Concepts 4

Question 1

In the AP CSP 'Explore' performance task context, which of the following computing innovations relies most heavily on abstraction?

Accepted Answer

An operating system that manages hardware resources through system calls

Answer

A physical keyboard

Answer

A monitor that displays pixels

Answer

A USB cable that transmits data

Question 2

Which of the following is the BEST reason to create a new abstraction in a program?

Accepted Answer

To group related functionality so it can be reused and understood without implementation details

Answer

To make the program use more memory

Answer

To slow down the program's execution

Answer

To prevent the program from being compiled

Question 3

A file system abstraction lets users work with 'files' and 'folders.' What complexity does this hide?

Accepted Answer

The low-level details of how data is stored on magnetic or solid-state media

Answer

The color of the monitor

Answer

The speed of the CPU

Answer

The network protocol used for internet access

Question 4

Which of the following pairs shows abstraction at TWO different levels?

Accepted Answer

JavaScript code and the web browser's JavaScript engine

Answer

Two different CSS stylesheets

Answer

Two HTML paragraph tags

Answer

A for-loop and a while-loop

Question 5

A student writes `average = computeAverage(scores)`. Why is `computeAverage` considered an abstraction?

Accepted Answer

Because the student can use it without knowing how the averaging calculation is implemented

Answer

Because the function name contains the word 'average'

Answer

Because the function returns a number

Answer

Because the variable `scores` is a list

Question 6

How does abstraction relate to the concept of 'modularity' in programming?

Accepted Answer

Abstraction enables modularity by allowing separate modules to interact through defined interfaces without exposing internals

Answer

Abstraction and modularity are unrelated concepts

Answer

Modularity requires programs to be written in machine code

Answer

Abstraction prevents programs from being split into modules

Question 7

What is the relationship between an API and abstraction?

Accepted Answer

An API is an abstraction layer that exposes specific functionality while hiding implementation details

Answer

An API exposes all internal source code to users

Answer

An API only works with machine learning models

Answer

An API eliminates the need for programming languages