App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 598 · 40 questions

Developer's tip (Think like the user): First decide which topic the question is about. Use that lesson’s rule: 48 px buttons, 16 px text, the screen stack, the flow order. For code, count positions from 0.

1. 1.Which of these helps everyone use the app? (a) fast-flashing lights (b) icons with no labels (c) strong colour contrast (d) tiny tap areas
2. 2.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. tap the Home tab
   2. open “Friend list”
   3. tap the Profile tab
   How many times must you tap Back to reach the main screen of this tab?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 40 px tall
   Start button: 72 px tall
   Back button: 56 px tall (a) Back (b) Help (c) Start
4. 4.✏️ Is this true of a wireframe or of a final design: shows where things go? (a) a wireframe (b) a final design
5. 5.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
6. 6.🖼️ In this wireframe (top to bottom), what is right below the tab bar?
   [ Save button ]
   [ tab bar ]
   [ search box ]
   [ filter buttons ] (a) search box (b) Save button (c) filter buttons
7. 7.🔢 In a photo-post flow, which comes first: “write a caption” or “open the camera screen”? (a) write a caption (b) open the camera screen
8. 8.♿ Does this help everyone, or make the app harder to use: big touch targets? (a) makes it harder (b) helps everyone
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
10. 10.Which of these is true of a final design? (a) uses plain grey boxes (b) has no real colours (c) shows where things go (d) uses the final pictures
11. 11.True or false: strong colour contrast is poor button design. (a) False (b) True
12. 12.♿ Does this help everyone, or make the app harder to use: tiny tap areas? (a) helps everyone (b) makes it harder
13. 13.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) on the phone (b) in the cloud
14. 14.💾 pop() takes off the last item. What does this code show?
    let songs = ["Kites", "Ocean", "Sunrise", "Rain"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Kites (b) Ocean (c) Sunrise (d) Rain
15. 15.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ top bar ]
    [ search box ]
    [ big picture ]
    [ list of items ]
    [ menu icon ] (a) list of items (b) top bar (c) menu icon (d) search box
16. 16.♿ Why add captions to videos? (a) to hide the sound (b) so anyone can follow (c) to add colour (d) to slow them down
17. 17.♿ A screen has 5 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
18. 18.💾 pop() takes off the last item. What does this code show?
    let songs = ["Sunrise", "Stars", "Ocean"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Ocean (b) Stars (c) Sunrise
19. 19.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ big picture ]
    [ top bar ]
    [ filter buttons ]
    [ search box ] (a) search box (b) filter buttons (c) big picture
20. 20.Which of these makes the app harder to use? (a) big touch targets (b) text that can grow (c) tiny tap areas (d) labels on every icon
21. 21.💾 What number does this code show?
    let coins = 4;
    coins = coins - 1;
    coins = coins + 3;
    show(coins);
22. 22.🔢 In a quiz-app flow, which comes FIRST? (a) see the final score (b) read a question (c) pick an answer (d) tap “Start quiz”
23. 23.Which of these makes the app harder to use? (a) colour as the only clue (b) text that can grow (c) big touch targets (d) strong colour contrast
24. 24.💾 What does this code show? (Positions start at 0.)
    let songs = ["Ocean", "Sunrise", "Rain"];
    show(songs[1]); (a) Rain (b) Sunrise (c) Ocean
25. 25.True or false: a final design uses plain grey boxes. (a) True (b) False
26. 26.🧭 About how many tabs suit a tab bar best? (a) 20 (b) 1 (c) 10 to 12 (d) 3 to 5
27. 27.🎨 Is this about UI or UX: the icon shapes? (a) UI (b) UX
28. 28.💾 What does this code show? (Positions start at 0.)
    let songs = ["Kites", "Rain", "Ocean"];
    show(songs[0]); (a) Ocean (b) Rain (c) Kites
29. 29.✏️ Is this true of a wireframe or of a final design: is a quick sketch? (a) a final design (b) a wireframe
30. 30.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ list of items ]
    [ title text ]
    [ search box ]
    [ Save button ] (a) list of items (b) Save button (c) title text (d) search box
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
32. 32.🎨 Is this about UI or UX: the screen layout? (a) UI (b) UX
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Cancel button: 60 px tall
    Help button: 72 px tall (a) Help (b) Cancel (c) Next
34. 34.🔍 Which is the odd one out? (a) how many taps it takes (b) how users feel after (c) the icon shapes (d) how fast a task is done
35. 35.🔀 In a good flow, each screen should lead to ___. (a) the same screen (b) a random page (c) a dead end (d) a clear next step
36. 36.🎨 Is this about UI or UX: the button colours? (a) UI (b) UX
37. 37.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Menu → Results → Offers → Address → Pens → Size
    Design B: Home → Shop → Menu
38. 38.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Menu: 9 px
    Caption: 17 px
    Label: 21 px
    Body text: 22 px
    Footer: 28 px (a) Label (b) Menu (c) Body text (d) Caption
39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
40. 40.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on pale grey (d) dark blue on white

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students