APCSP Abstraction Concepts 5

Question 1

Which of the following illustrates abstraction in binary data representation?

Accepted Answer

Using the number 65 to represent the letter 'A' in ASCII, hiding the binary value 01000001

Answer

Storing data on a hard drive

Answer

Using a for-loop to count from 1 to 10

Answer

Connecting two computers with an ethernet cable

Question 2

A program uses a `Stack` data structure with `push()` and `pop()` operations. The programmer doesn't know if the stack uses an array or a linked list internally. This is an example of:

Accepted Answer

Data abstraction hiding the internal implementation of the stack

Answer

A syntax error in the program

Answer

Parallel processing

Answer

Binary search

Question 3

Which of the following statements about abstraction and problem-solving is TRUE?

Accepted Answer

Abstraction allows a programmer to ignore irrelevant details and focus on the essential aspects of a problem

Answer

Abstraction always makes programs run faster

Answer

Abstraction is only useful in object-oriented programming languages

Answer

Abstraction requires knowledge of assembly language

Question 4

Consider a simulation of a solar system. The programmer represents each planet as an object with `mass`, `velocity`, and `position`. Which detail is being abstracted away?

Accepted Answer

The chemical composition of each planet's atmosphere

Answer

The planet's mass

Answer

The planet's orbital velocity

Answer

The planet's position in space

Question 5

In AP CSP, which of the following best describes how abstractions are used in the development of the internet?

Accepted Answer

The internet uses multiple layers of abstraction (physical, internet, transport, application) so each layer only interacts with the one above and below it

Answer

Every internet device must directly manage physical signal transmission

Answer

The internet has no abstraction layers because all data travels as raw binary

Answer

Abstraction on the internet is only used for security purposes

Question 6

A programmer writes a function `sendEmail(to, subject, body)`. From the programmer's perspective, which of the following is hidden by this abstraction?

Accepted Answer

The SMTP protocol steps and server handshake needed to transmit the email

Answer

The recipient's email address

Answer

The email's subject line

Answer

The text content of the email body

Question 7

Which of the following is the MOST accurate definition of abstraction as used in AP CSP?

Accepted Answer

A technique that manages complexity by hiding unnecessary details while keeping relevant information accessible

Answer

The process of converting code from one programming language to another

Answer

A method for encrypting data so it cannot be read by unauthorized users

Answer

The use of loops and conditionals to control program flow