Unit 3 - Intro to App Design

Question 1

user interface

Answer 1

the inputs and outputs that allow a user to interact with a piece of software. User interfaces can include a variety of forms such as buttons, menus, images, text, and graphics.

Question 2

input

Answer 2

data that are sent to a computer for processing by a program. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text.

Question 3

output

Answer 3

any data that are sent from a program to a device. Can come in a variety of forms, such as tactile interaction, audio, visuals, or text

Question 4

Program Statement

Answer 4

a command or instruction. Sometimes also referred to as a code statement

Question 5

program

Answer 5

• a collection of program statements
• programs run (or “execute”) one command at a time

Question 6

Sequential Programming

Answer 6

program statements run in order, from top to bottom
- no user interaction
- code runs the same way every time

Question 7

Event Driven Programming

Answer 7

some program statements run when triggered by an event, like a mouse click or a key press
- programs run differently each time depending on user interactions

Question 8

documentation

Answer 8

a written description of how a command or piece of code works or was developed

Question 9

comment

Answer 9

form of program documentation written into the program to be read by people and which do not affect how a program runs

Question 10

debugging

Answer 10

the process of finding and fixing problems in code

Question 11

pair programming

Answer 11

a collaborative programming style in which two programmers switch between the roles of writing code and tracking or planning high level progress

Question 12

pair programming: driver

Answer 12

Manipulates the keyboard and the mouse

Question 13

pair programming: navigator

Answer 13

keeps track of the big picture. Guides towards the goal.

Question 14

example of input in an app

Answer 14

a button clicked by the user

Question 15

what would be considered output in an application

Answer 15

a notification sound from an app

Question 16

the user interface of an app refers to

Answer 16

the elements that allow users to interact with the app, such as buttons and text fields

Question 17

when a user presses a “submit” button and sees a confirmation message, the button is acting as an ______ and the message is _____

Answer 17

• Button is an input
• Message is an output

Question 18

why is it important to use descriptive names for element IDs in app design?

Answer 18

it makes the code easier to read and maintain

Question 19

which of the following is not an example of user interface element

Answer 19

a variable that stores the app data

Question 20

which of the actions below would usually be helpful in designing and developing an app?

i. Interviewing potential users of the app.
ii. Writing the entire program code before testing any parts of it.
iii. Observing users attempting to use the app.

Answer 20

i and iii

Question 21

which of the following best describes the purpose of a design specification

Answer 21

describing the requirements for how a program will work or users will interact with it

Question 22

if a program is run then the user clicks a button once, what is displayed is what runs naturally first THEN the click

Question 23

words must be written in quotes

Question 24

which of the following best describes the differences between sequential and event driven programming

Answer 24

In sequential programming commands run in the order they are written. in event driven programming, some commands run in response to user interactions or other events.

Question 25

what is not a reason to include comments in programs

Answer 25

comments help the computer decide whether certain components of a program are important

Question 26

when debugging it up, which of the following best describes the purpose of this process

Answer 26

finding and fixing errors in the code to ensure the app runs as expected

Question 27

which of these actions is a common first step in debugging an app when a button doesn’t work as expected

Answer 27

checking if the buttons ID matches what is used in the code

Question 28

what number of bits do you need to represent a number in binary

Answer 28

find the exponent that raises 2 to be larger then given number

Question 29

when do Internet connected computing devices use the IP

Answer 29

IP is used whenever two computing devices send data to each other over the Internet.

Question 30

is the Internet decentralized or centralized?

Answer 30

the Internet is decentralized, so if a single connection fails, the network can remain functional

Question 31

which of the following is not true about functions in programming ?

Answer 31

functions cannot make calls to other functions within the same program

Question 32

what is one important name and convention of functions

Answer 32

a function name should be as descriptive as possible to indicate what the function does

Question 33

can two functions in a single program, have a different name, but contain identical code

Answer 33

yes