Unit 3 Study Guide
1. What are BUTTONS in an app used for?
Used to do a certain task for the user when the do something such as clicking to get the output
2. What are TEXT INPUTS AND TEXT AREAS in an app used for? Are they editable by the user?
Text inputs are for the user to input a short amount of text and text areas are for users to type a
large amount of words.
What are LABELS in an app used for? Are they editable by the user?
Labels are text no editable by user, commonly used for a title.
What are DROPDOWNS in an app used for? Provide an example of a good use of a dropdown menu.
Used for users to drop down and select options.
3. What are RADIO BUTTONS in an app used for? Provide an example of a good use of a group of
radio buttons.
Used to only be able to select one right answer
4. What are CHECKBOXES in an app used for? Provide an example of a good use of a group of
checkboxes.
Checkboxes are used to select multiple choices.
5. What are IMAGES in an app used for? Where can you get images from to use in your app?
Images are shown to the user and helps the app be more fun. You have to drop an insert picture
then add the picture to the code.
6. What are SCREENS in an app important or useful?
To able to see more screens for different types of interactive uses.
7. Describe how a user can interact with an app.
Clicking, mouse over, selecting
8. Describe possible outputs an app can generate for a user.
New screens, music, new text to pop up
9. Do comments alter the outcome of your program? YES or NO
No
10. What are self-commenting element IDs? Please provide 2 examples.
like a home button and if I have had a baseball image I will call it baseball_Image
11. What is the difference between Code Mode and Design Mode? What can the programmer do in
each mode?
Code mode is setting tasks for things such as buttons, design mode is place images, setting colors,
placing buttons
12. How are sequential programs and event-driven programs different?
Sequential programs start at a beginning point and progress to the end point in a way that can be
perfectly predicted when the program begins running. Event-driven programs on the other hand do not
progress in a predictable order. User-generated events
13. Be sure to understand how debugging works in JavaScript - U3 L7 – Bubbles 2-7
Got it
14. What is a program?
A computer program is a collection of instructions that can be executed by a computer to
perform a specific task.
15. Describe simple sequential program execution.
Sequential execution means that each command in a program script executes in the order in
which it is listed in the program
16. Describe event-driven program execution.
when the user does the needed input here comes the output
17. What is debugging? Why is it important?
Fixing errors in your coding, important so your code works
Use the Word Bank provided to answer the following questions.
Word Bank
Low
Numbers
Three
One
Debug Console
Double quotations
Comments
onEvent
setProperty
High
18. Strings need to be placed in double quotations.
19. Numbers do not need to be placed in double quotations.
20. Where does the console.log command print text in a program?
Debug console
21. SetProperty changes the properties of elements on the screen.
22. console.log command needs one input. (looking for a number)
23. setProperty command needs three input. (looking for a number)
24. What command makes a program respond to the user?
onEvent
25. randomNumber chooses a new random number each time, between low and high values given.
26. What do these symbols
Comments
// indicate?