App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 724 · 40 questions

Developer's tip (Plan, design, build, check): Find the topic: what apps are, designing apps, or logic and building. Read every screen, list or code line carefully, top to bottom. For code, write each value down step by step and check it again.

1. 1.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
   Design A: Home → Item → Shop → Cart → Address
   Design B: Home → Results → Address → Shop (a) Design B (b) Design A
2. 2.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   forgetting birthdays: 21 votes
   no quiet study place: 15 votes
   losing water bottles: 17 votes (a) losing water bottles (b) no quiet study place (c) forgetting birthdays
3. 3.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) red on green
4. 4.True or false: a recipe finder is the best fit for a student who keeps forgetting due dates. (a) True (b) False
5. 5.👆 Which of these is an event? (a) a list of names (b) the icon colour (c) the font size (d) the user taps a button
6. 6.💡 After a survey, which need should version 1 solve? (a) a random need (b) the rarest need (c) the most common need (d) the newest trend
7. 7.True or false: a tiny 20 px button is good button design. (a) True (b) False
8. 8.🔐 Is this permission request fair or too much: timer → your photos? (a) fair (b) too much
9. 9.🔢 In a sign-up flow, which comes first: “type name and email” or “enter the code sent”? (a) enter the code sent (b) type name and email
10. 10.Which of these is true of a menu button? (a) shows 3 to 5 icons (b) goes to the last screen (c) opens a list of pages (d) undoes one move
11. 11.🎯 Is this a user need or a feature: “I forget my homework”? (a) a user need (b) a feature
12. 12.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) a beep sound (d) typing your age
13. 13.🧩 What does a button do when you tap it? (a) saves the battery (b) changes the phone (c) starts an action (d) shows the time
14. 14.🗒️ Version 1 of a water reminder must be ready in 14 days. How many days are left for extras after the must-haves?
    set a reminder time: 3 days
    log a glass of water: 4 days
    see today’s total: 3 days
15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
16. 16.🔁 What does a loop do? (a) saves photos (b) draws icons (c) deletes code (d) repeats code
17. 17.🔍 Which is the odd one out? (a) share the download link (b) pick the features (c) sketch the screens (d) draw the user flow
18. 18.♿ A screen has 8 icon buttons. Only 5 of them have a text label for screen readers. How many still need a label?
19. 19.🔁 What number does this code show?
    let steps = [1, 3, 1, 4];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
20. 20.🧩 How many buttons does this app screen have?
    [title] Settings
    [text box] Name
    [switch] Sound
    [text box] Email
    [button] Save
21. 21.Which of these is a feature? (a) “I keep missing the bus” (b) “Small text is hard” (c) “What should I cook?” (d) a dark mode switch
22. 22.🎯 An app for “everyone” with no clear user usually ___. (a) helps nobody well (b) is easy to build (c) needs no testing (d) wins every prize
23. 23.🎯 Is this a user need or a feature: “Small text is hard”? (a) a user need (b) a feature
24. 24.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
25. 25.🚀 Which of these versions is the OLDEST?
    3.16.8, 2.25.9, 3.10.1, 3.5.0 (a) 3.16.8 (b) 3.5.0 (c) 3.10.1 (d) 2.25.9
26. 26.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let lives = 34; // start at 34
    line 2: lives = lives + 2; // add 2
    line 3: lives = lives + 4; // take away 4
    line 4: show(lives); // show it
27. 27.True or false: an app opens from a link. (a) False (b) True
28. 28.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 10 px
    Label: 16 px
    Title: 21 px
    Caption: 20 px
29. 29.💾 Saving data in the cloud lets you ___. (a) never need a password (b) use it on any device (c) skip the internet (d) shrink the app
30. 30.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. tap the Profile tab
    3. open “Video”
    4. tap Back
    5. open “Friend list”
    Which screen are you on now? (a) Video (b) Friend list (c) Search (d) Home
31. 31.🔁 What is the LAST line this code shows?
    let names = ["Meera", "Riya", "Zoya", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Meera (b) Hi, Zoya (c) Hi, Kabir (d) Hi, Riya
32. 32.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
    function price(age) {
      if (age <= 12) {
        return 50;
      }
      return 100;
    }
    Test 1: price(16) → expected 100
    Test 2: price(12) → expected 100
    Test 3: price(10) → expected 50 (a) Test 3 (b) Test 2 (c) Test 1
33. 33.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a wireframe (b) a final design
34. 34.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) savings stickers (b) pie-chart colours (c) export to a file (d) add money spent
35. 35.🚀 In version 2.5.1, which number is the major version? (a) 1 (b) 251 (c) 5 (d) 2
36. 36.🔢 In a sign-up flow, which comes LAST? (a) open the app (b) tap “Sign up” (c) enter the code sent (d) see the home screen
37. 37.🧩 Which of these is a button on this screen?
    [title] Sign Up
    [button] Start
    [text box] Email (a) Email (b) Start
38. 38.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Shop → Address → Menu
    Design B: Home → Results → Item → Pay (a) Design B (b) Design A
39. 39.🔀 What number does this shop app show?
    let total = 900;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read

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