App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 432 · 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.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
2. 2.True or false: strong colour contrast is poor button design. (a) False (b) True
3. 3.💾 pop() takes off the last item. What does this code show?
   let friends = ["Zoya", "Kabir", "Riya", "Aman"];
   friends.pop();
   show(friends[friends.length - 1]); (a) Riya (b) Zoya (c) Aman (d) Kabir
4. 4.Which of these makes the app harder to use? (a) big touch targets (b) fast-flashing lights (c) text that can grow (d) captions on videos
5. 5.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Pens → Confirm → Offers → Address → Item
   Design B: Home → Size → Item → Results → Offers
6. 6.Which of these is true of a final design? (a) is a quick sketch (b) has no real colours (c) shows where things go (d) has the real colours
7. 7.💾 What number does this code show?
   let friends = ["Zoya", "Meera"];
   friends.push("Riya");
   friends.push("Kabir");
   show(friends.length);
8. 8.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. tap the Profile tab
   2. open “Video”
   3. tap Back
   4. open “Badges”
   How many times must you tap Back to reach the main screen of this tab?
9. 9.🔢 In a food-order flow, which comes first: “open the menu” or “pay for the order”? (a) pay for the order (b) open the menu
10. 10.🧭 About how many tabs suit a tab bar best? (a) 20 (b) 10 to 12 (c) 1 (d) 3 to 5
11. 11.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Title: 22 px
    Body text: 18 px
    Label: 16 px
    Hint: 12 px
12. 12.💾 What does this code show? (Positions start at 0.)
    let notes = ["Maths", "Sports", "Science", "Hindi"];
    show(notes[1]); (a) Maths (b) Hindi (c) Science (d) Sports
13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
14. 14.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Badges”
    2. tap the Lessons tab
    3. tap the Quiz tab
    4. open “Help page”
    5. open “Video”
    How many times must you tap Back to reach the main screen of this tab?
15. 15.True or false: a wireframe uses the final pictures. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 52 px tall
    Help button: 52 px tall
    Back button: 56 px tall
17. 17.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Size → Offers → Cart → Pens → Shop → Menu
    Design B: Home → Cart → Confirm
18. 18.♿ Does this help everyone, or make the app harder to use: fast-flashing lights? (a) helps everyone (b) makes it harder
19. 19.🔍 Which is the odd one out? (a) the screen layout (b) the font size (c) how fast a task is done (d) the icon shapes
20. 20.🧭 Which part of navigation opens a list of pages? (a) a menu button (b) the back button (c) a tab bar
21. 21.💾 pop() takes off the last item. What does this code show?
    let songs = ["Ocean", "Monsoon", "Sunrise"];
    songs.pop();
    show(songs[songs.length - 1]); (a) Sunrise (b) Ocean (c) Monsoon
22. 22.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Help page”
    2. tap Back
    3. tap the Lessons tab
    Which screen are you on now? (a) Quiz (b) Help page (c) Lessons (d) Me
23. 23.🔢 In a sign-up flow, which comes FIRST? (a) type name and email (b) see the home screen (c) make a password (d) open the app
24. 24.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ top bar ]
    [ Save button ]
    [ filter buttons ]
    [ title text ]
    [ Add button ] (a) top bar (b) filter buttons (c) Add button (d) Save button
25. 25.🔀 What is a user flow? (a) a type of font (b) a charging cable (c) a colour theme (d) the path through screens
26. 26.🔢 In a food-order flow, which comes LAST? (a) pay for the order (b) pick a dish (c) track the order (d) open the menu
27. 27.Which of these is true of a final design? (a) shows the real fonts (b) is a quick sketch (c) has no real colours (d) uses plain grey boxes
28. 28.🎨 UX stands for user ___. (a) express (b) example (c) extra (d) experience
29. 29.🎨 Is this about UI or UX: the icon shapes? (a) UI (b) UX
30. 30.🔢 In a photo-post flow, which comes LAST? (a) add a filter (b) take the photo (c) post the photo (d) open the camera screen
31. 31.Which of these fits saving in the cloud? (a) notes to read offline (b) a draft you are typing (c) a class leaderboard (d) your last game level
32. 32.🧭 Which part of navigation sits at the bottom? (a) a menu button (b) the back button (c) a tab bar
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
34. 34.🔢 In a sign-up flow, which comes LAST? (a) open the app (b) type name and email (c) see the home screen (d) make a password
35. 35.🧭 What does the back button usually do? (a) deletes the page (b) opens settings (c) closes all apps (d) goes to the last screen
36. 36.🔍 Which is the odd one out? (a) the button colours (b) whether users get lost (c) the theme colours (d) the screen layout
37. 37.🔢 In a sign-up flow, what comes right after “make a password”? (a) type name and email (b) open the app (c) enter the code sent (d) see the home screen
38. 38.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ filter buttons ]
    [ Add button ]
    [ title text ]
    [ top bar ] (a) title text (b) filter buttons (c) Add button (d) top bar
39. 39.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) light grey on white (d) black on pale grey
40. 40.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Score card”
    2. tap the Me tab
    3. tap the Me tab
    4. open “Video”
    5. tap Back
    Which screen are you on now? (a) Score card (b) Video (c) Me (d) Lessons

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