App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 374 · 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.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) on the phone (b) in the cloud
2. 2.🔢 In a photo-post flow, which comes FIRST? (a) write a caption (b) add a filter (c) open the camera screen (d) take the photo
3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
4. 4.🖼️ In this wireframe (top to bottom), what is right above the list of items?
   [ top bar ]
   [ big picture ]
   [ title text ]
   [ list of items ] (a) top bar (b) big picture (c) title text
5. 5.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Menu → Cart → Size
   Design B: Home → Shop → Menu → Pay → Cart → Size → Pens
6. 6.💾 What number does this code show?
   let friends = ["Riya", "Meera"];
   friends.push("Kabir");
   friends.push("Aman");
   show(friends.length);
7. 7.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
   Design A: Home → Shop → Pens → Confirm → Offers → Menu → Search
   Design B: Home → Address → Size (a) Design A (b) Design B
8. 8.Which of these is true of a tab bar? (a) undoes one move (b) hides extra links (c) goes to the last screen (d) shows 3 to 5 icons
9. 9.Which of these is true of the back button? (a) sits at the bottom (b) goes to the last screen (c) switches main sections (d) hides extra links
10. 10.🔢 In a photo-post flow, which comes LAST? (a) post the photo (b) take the photo (c) add a filter (d) open the camera screen
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
12. 12.Which of these fits saving on the phone? (a) chat messages to friends (b) a class leaderboard (c) your last game level (d) photos on two devices
13. 13.🔀 Why plan the user flow before building? (a) to add more taps (b) so each step is clear (c) to skip testing (d) to hide the buttons
14. 14.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) dark blue on black (d) light grey on white
15. 15.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ top bar ]
    [ list of items ]
    [ tab bar ]
    [ Save button ]
    [ search box ]
    [ Add button ] (a) Save button (b) Add button (c) tab bar (d) list of items
16. 16.💾 What number does this code show?
    let songs = ["Kites", "Stars", "Monsoon", "Sunrise"];
    songs.push("Rain");
    show(songs.length);
17. 17.True or false: a final design uses plain grey boxes. (a) True (b) False
18. 18.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Feed tab
    2. open “Help page”
    3. tap Back
    4. open “Score card”
    5. open “Friend list”
    Which screen are you on now? (a) Score card (b) Feed (c) Friend list (d) Help page
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
20. 20.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on black (d) black on yellow
21. 21.🔢 In a food-order flow, which comes FIRST? (a) add it to the cart (b) pick a dish (c) pay for the order (d) open the menu
22. 22.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Title: 27 px
    Hint: 19 px
    Body text: 11 px (a) Title (b) Hint (c) Body text
23. 23.Which of these makes the app harder to use? (a) captions on videos (b) big touch targets (c) sudden loud sounds (d) strong colour contrast
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.True or false: photos on two devices fits saving in the cloud. (a) False (b) True
27. 27.🎨 Is this about UI or UX: how easy sign-up is? (a) UX (b) UI
28. 28.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Caption: 11 px
    Title: 11 px
    Hint: 16 px
29. 29.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Search → Offers → Size
    Design B: Home → Pens → Results
30. 30.Which of these is about UI (the look)? (a) how easy sign-up is (b) the icon shapes (c) how fast a task is done (d) how users feel after
31. 31.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on yellow (d) dark blue on white
32. 32.True or false: a final design uses the final pictures. (a) False (b) True
33. 33.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 14 px
    Menu: 21 px
    Footer: 14 px
    Caption: 13 px
    Hint: 13 px
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 68 px tall
    Cancel button: 40 px tall (a) Send (b) Next (c) Cancel
36. 36.🔢 In a food-order flow, which comes first: “open the menu” or “add it to the cart”? (a) open the menu (b) add it to the cart
37. 37.✏️ Why draw a wireframe before coding? (a) it runs the app (b) it adds colours (c) changes are quick (d) it saves data
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 40 px tall
    Save button: 64 px tall
    Send button: 36 px tall
39. 39.Which of these is true of the back button? (a) opens a list of pages (b) hides extra links (c) undoes one move (d) shows 3 to 5 icons
40. 40.🔀 In a good flow, each screen should lead to ___. (a) a random page (b) a dead end (c) the same screen (d) a clear next step

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