App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 287 · 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 is the odd one out? (a) sudden loud sounds (b) labels on every icon (c) text that can grow (d) big touch targets
2. 2.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
   1. open “Score card”
   2. tap the Lessons tab
   3. tap the Lessons tab
   4. open “Video”
   Which screen are you on now? (a) Video (b) Score card (c) Quiz (d) Lessons
3. 3.🔍 Which is the odd one out? (a) how fast a task is done (b) the icon shapes (c) how users feel after (d) how easy sign-up is
4. 4.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
   1. open “Help page”
   2. open “Badges”
   3. tap the Chat tab
   4. open “Score card”
   5. tap Back
   Which screen are you on now? (a) Score card (b) Help page (c) Badges (d) Chat
5. 5.Which of these is about UI (the look)? (a) how users feel after (b) the font size (c) how fast a task is done (d) how easy sign-up is
6. 6.🔍 Which is the odd one out? (a) labels on every icon (b) strong colour contrast (c) big touch targets (d) icons with no labels
7. 7.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Help page”
   2. tap Back
   3. open “Badges”
   4. tap Back
   How many times must you tap Back to reach the main screen of this tab?
8. 8.True or false: buttons almost touching is poor button design. (a) True (b) False
9. 9.🔢 In a quiz-app flow, which comes FIRST? (a) pick an answer (b) see if it is right (c) tap “Start quiz” (d) see the final score
10. 10.🔀 Why plan the user flow before building? (a) so each step is clear (b) to skip testing (c) to add more taps (d) to hide the buttons
11. 11.💾 In most code, the first item of a list is at position ___. (a) 0 (b) 10 (c) 1 (d) 2
12. 12.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Feed tab
    2. open “Badges”
    3. tap the Chat tab
    How many times must you tap Back to reach the main screen of this tab?
13. 13.True or false: a tiny 20 px button is poor button design. (a) True (b) False
14. 14.💾 What number does this code show?
    let songs = ["Stars", "Kites", "Sunrise"];
    songs.push("Monsoon");
    songs.push("Ocean");
    show(songs.length);
15. 15.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ tab bar ]
    [ list of items ]
    [ search box ]
    [ big picture ]
    [ Save button ] (a) search box (b) tab bar (c) list of items (d) Save button
16. 16.True or false: a clear word like Save is poor button design. (a) False (b) True
17. 17.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Badges”
    2. tap the Settings tab
    3. open “Help page”
    Which screen are you on now? (a) Badges (b) Feed (c) Help page (d) Chat
18. 18.💾 Where should the app save chat messages to friends: on the phone or in the cloud? (a) on the phone (b) in the cloud
19. 19.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 24 px
    Title: 11 px
    Caption: 28 px
    Menu: 28 px
    Body text: 18 px (a) Caption (b) Title (c) Label (d) Menu
20. 20.♿ What should every icon-only button have for screen readers? (a) a long animation (b) a text label (c) a sound (d) a bright colour
21. 21.True or false: a wireframe is a quick sketch. (a) False (b) True
22. 22.🧭 Which part of navigation opens a list of pages? (a) a tab bar (b) the back button (c) a menu button
23. 23.🔀 What is a user flow? (a) a colour theme (b) the path through screens (c) a charging cable (d) a type of font
24. 24.🎨 UX stands for user ___. (a) extra (b) experience (c) example (d) express
25. 25.🔍 Which is the odd one out? (a) how easy sign-up is (b) the screen layout (c) the theme colours (d) the button colours
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
27. 27.🔍 Which is the odd one out? (a) how users feel after (b) how many taps it takes (c) the theme colours (d) how fast a task is done
28. 28.Which of these fits saving in the cloud? (a) notes to read offline (b) a draft you are typing (c) the sound on/off setting (d) a class leaderboard
29. 29.💾 What number does this code show?
    let score = 7;
    score = score - 6;
    score = score + 4;
    show(score);
30. 30.🔢 In a food-order flow, what comes right after “check the cart”? (a) open the menu (b) pick a dish (c) add it to the cart (d) pay for the order
31. 31.♿ Accessibility means an app works for ___. (a) only the coder (b) everyone (c) only experts (d) nobody
32. 32.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Menu → Item → Shop
    Design B: Home → Menu → Search (a) Design A (b) Design B
33. 33.💾 Data saved only on the phone is lost when ___. (a) the phone is lost (b) the app is closed (c) the screen turns off (d) you send a message
34. 34.True or false: the screen layout is about UI (the look). (a) False (b) True
35. 35.♿ A screen has 6 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
36. 36.Which of these is true of a wireframe? (a) has the real colours (b) looks like the real app (c) is a quick sketch (d) uses the final pictures
37. 37.True or false: icons with no meaning is good button design. (a) True (b) False
38. 38.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Label: 18 px
    Menu: 23 px
    Hint: 14 px
    Title: 28 px (a) Hint (b) Label (c) Title (d) Menu
39. 39.Which of these is true of a wireframe? (a) has no real colours (b) uses the final pictures (c) has the real colours (d) looks like the real app
40. 40.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a wireframe (b) a final design

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