App Dev Worksheet: Part 2 Test

App development lesson 16: Designing apps: Part 2 test · Set 125 · 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 colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on black (d) dark blue on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 48 px tall
   Back button: 48 px tall
   Cancel button: 64 px tall
3. 3.🧭 What does the back button usually do? (a) deletes the page (b) goes to the last screen (c) closes all apps (d) opens settings
4. 4.🔢 In a photo-post flow, which comes FIRST? (a) open the camera screen (b) take the photo (c) write a caption (d) add a filter
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
6. 6.🔀 Why plan the user flow before building? (a) so each step is clear (b) to skip testing (c) to hide the buttons (d) to add more taps
7. 7.Which of these helps everyone use the app? (a) captions on videos (b) icons with no labels (c) sudden loud sounds (d) colour as the only clue
8. 8.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Edit photo”
   2. tap the Profile tab
   3. tap the Profile tab
   4. open “Friend list”
   5. open “Match report”
   Which screen are you on now? (a) Friend list (b) Match report (c) Edit photo (d) Home
9. 9.✏️ Why draw a wireframe before coding? (a) it saves data (b) changes are quick (c) it adds colours (d) it runs the app
10. 10.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a final design (b) a wireframe
11. 11.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Shop → Results → Menu → Address → Pay → Size
    Design B: Home → Menu → Pens → Pay → Results → Item
12. 12.🔢 In a food-order flow, which comes first: “open the menu” or “pick a dish”? (a) open the menu (b) pick a dish
13. 13.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Title: 14 px
    Hint: 21 px
    Body text: 19 px
    Caption: 11 px
14. 14.True or false: chat messages to friends fits saving in the cloud. (a) False (b) True
15. 15.✏️ A box with a cross in a wireframe usually means ___. (a) an error (b) a closed app (c) delete this (d) a picture goes here
16. 16.💾 What number does this code show?
    let friends = ["Kabir", "Arjun"];
    friends.push("Aman");
    show(friends.length);
17. 17.♿ Does this help everyone, or make the app harder to use: tiny tap areas? (a) helps everyone (b) makes it harder
18. 18.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Address → Shop
    Design B: Home → Address → Menu → Offers → Pens → Search
19. 19.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 10 px
    Body text: 23 px
    Title: 22 px
    Label: 18 px (a) Title (b) Footer (c) Label (d) Body text
20. 20.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a final design (b) a wireframe
21. 21.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) makes it harder (b) helps everyone
22. 22.🎨 UX stands for user ___. (a) express (b) extra (c) experience (d) example
23. 23.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Offers → Pens → Address → Results → Cart → Shop
    Design B: Home → Item → Offers (a) Design A (b) Design B
24. 24.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) makes it harder (b) helps everyone
25. 25.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Badges”
    2. tap Back
    3. open “Friend list”
    4. tap Back
    5. tap the Settings tab
    How many times must you tap Back to reach the main screen of this tab?
26. 26.🔍 Which is the odd one out? (a) sudden loud sounds (b) text that can grow (c) strong colour contrast (d) big touch targets
27. 27.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) home screen (c) tab bar (d) dead end
28. 28.♿ Accessibility means an app works for ___. (a) nobody (b) everyone (c) only experts (d) only the coder
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
30. 30.True or false: a final design looks like the real app. (a) True (b) False
31. 31.🔢 In a food-order flow, which comes first: “open the menu” or “track the order”? (a) open the menu (b) track the order
32. 32.True or false: a wireframe shows where things go. (a) False (b) True
33. 33.🎨 Fewer taps to finish a task usually means ___. (a) more colours (b) a bigger app (c) better UX (d) worse UX
34. 34.💾 What number does this code show?
    let score = 3;
    score = score - 1;
    score = score + 5;
    show(score);
35. 35.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Title: 27 px
    Body text: 22 px
    Footer: 19 px
    Hint: 11 px (a) Body text (b) Footer (c) Title (d) Hint
36. 36.💾 What number does this code show?
    let points = 8;
    points = points - 2;
    points = points + 3;
    show(points);
37. 37.♿ Why add captions to videos? (a) to hide the sound (b) to add colour (c) to slow them down (d) so anyone can follow
38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 64 px tall
    Start button: 52 px tall
    Cancel button: 44 px tall
40. 40.🧭 Which part of navigation goes to the last screen? (a) a tab bar (b) the back button (c) a menu button

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