App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 47 · 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.💾 What number does this code show?
   let score = 8;
   score = score - 7;
   score = score + 4;
   show(score);
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) light grey on white
4. 4.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
   [ Save button ]
   [ search box ]
   [ menu icon ]
   [ list of items ] (a) menu icon (b) search box (c) Save button (d) list of items
5. 5.🔍 Which is the odd one out? (a) strong colour contrast (b) labels on every icon (c) icons with no labels (d) captions on videos
6. 6.True or false: “colour as the only clue” makes the app harder to use. (a) True (b) False
7. 7.🔢 In a photo-post flow, which comes FIRST? (a) add a filter (b) write a caption (c) post the photo (d) open the camera screen
8. 8.🔢 In a photo-post flow, what comes right after “write a caption”? (a) add a filter (b) post the photo (c) take the photo (d) open the camera screen
9. 9.🧭 Which part of navigation hides extra links? (a) a tab bar (b) a menu button (c) the back button
10. 10.Which of these is about UX (the experience)? (a) the font size (b) the icon shapes (c) the screen layout (d) how users feel after
11. 11.True or false: how many taps it takes is about UI (the look). (a) False (b) True
12. 12.♿ A screen has 5 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
13. 13.💾 What does this code show? (Positions start at 0.)
    let notes = ["Art", "Music", "Hindi", "Science", "Sports"];
    show(notes[1]); (a) Art (b) Science (c) Hindi (d) Music
14. 14.🔀 Why plan the user flow before building? (a) to add more taps (b) to skip testing (c) so each step is clear (d) to hide the buttons
15. 15.True or false: notes to read offline fits saving on the phone. (a) False (b) True
16. 16.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Size → Pens → Shop
    Design B: Home → Offers → Results → Search → Pens → Size
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ top bar ]
    [ title text ]
    [ tab bar ]
    [ big picture ]
    [ Add button ]
    [ menu icon ] (a) big picture (b) title text (c) Add button (d) menu icon
19. 19.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Match report”
    2. open “Friend list”
    3. tap the Me tab
    4. open “Badges”
    How many times must you tap Back to reach the main screen of this tab?
20. 20.True or false: the font size is about UI (the look). (a) False (b) True
21. 21.🎨 UI stands for user ___. (a) interface (b) idea (c) internet (d) input
22. 22.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Caption: 18 px
    Footer: 16 px
    Body text: 10 px
    Menu: 13 px
23. 23.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Map”
    2. open “Badges”
    3. tap the Chat tab
    4. tap the Chat tab
    5. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?
24. 24.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) black on pale grey
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Edit photo”
    2. tap Back
    3. open “Video”
    4. open “Score card”
    5. tap the Search tab
    How many times must you tap Back to reach the main screen of this tab?
26. 26.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ Add button ]
    [ search box ]
    [ list of items ]
    [ top bar ] (a) list of items (b) top bar (c) search box (d) Add button
27. 27.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Cart → Menu → Offers
    Design B: Home → Shop → Confirm → Pens → Results → Address → Size (a) Design B (b) Design A
28. 28.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Address → Results → Size
    Design B: Home → Size → Pens → Pay → Cart
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
30. 30.True or false: your last game level fits saving in the cloud. (a) True (b) False
31. 31.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Done button: 32 px tall
    Next button: 52 px tall (a) Done (b) Save (c) Next
33. 33.Which of these is true of the back button? (a) opens a list of pages (b) switches main sections (c) goes to the last screen (d) hides extra links
34. 34.🖼️ How many parts (boxes) does this wireframe have?
    [ list of items ]
    [ big picture ]
    [ top bar ]
    [ Add button ]
35. 35.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Map”
    2. tap Back
    3. open “Match report”
    4. open “Friend list”
    5. tap the Lessons tab
    How many times must you tap Back to reach the main screen of this tab?
36. 36.♿ Accessibility means an app works for ___. (a) only the coder (b) only experts (c) everyone (d) nobody
37. 37.True or false: how users feel after is about UX (the experience). (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 28 px tall
    Start button: 48 px tall
    Done button: 64 px tall (a) Start (b) Next (c) Cancel (d) Done
39. 39.True or false: a wireframe looks like the real app. (a) True (b) False
40. 40.True or false: icons with no meaning is poor button design. (a) False (b) True

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