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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 676 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.True or false: your saved notes is a button. (a) True (b) False
  2. 2.🧪 Who else should try an app before release? (a) nobody (b) the app icon (c) real users (d) only the coder
  3. 3.🎯 A short made-up profile of a typical user is called a ___. (a) password (b) persona (c) pixel (d) protocol
  4. 4.🗒️ Version 1 of a pocket-money tracker must be ready in 12 days. How many days are left for extras after the must-haves?
    add money received: 4 days
    add money spent: 2 days
    show the balance: 4 days
  5. 5.🧩 Which input is best for typing your name? (a) a text box (b) a picture (c) a slider (d) a switch
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Back button: 68 px tall
    Save button: 68 px tall
    Start button: 56 px tall     (a) Start (b) Cancel (c) Back (d) Save
  7. 7.🔀 A screen with no way forward or back is called a ___. (a) dead end (b) home screen (c) tab bar (d) shortcut
  8. 8.📱 Which one has a web address: an app or a website? (a) an app (b) a website
  9. 9.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
  10. 10.🔐 Which permission does a bus tracker really need? (a) the camera (b) location (c) contacts (d) the microphone
  11. 11.🔁 What number does this code show?
    let scores = [98, 88, 93, 67];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  12. 12.💾 What is a variable? (a) a named box for a value (b) a type of screen (c) a picture (d) a phone setting
  13. 13.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 43; // start at 43
    line 2: lives = lives - 7; // take away 4
    line 3: lives = lives + 5; // add 5
    line 4: show(lives); // show it
  14. 14.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Label: 14 px
    Menu: 12 px
    Hint: 11 px
    Title: 15 px
    Caption: 18 px
  15. 15.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 46; // start at 46
    line 2: stars = stars + 5; // take away 5
    line 3: stars = stars * 2; // double it
    line 4: show(stars); // show it
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 60 px tall
    Next button: 56 px tall
    Start button: 32 px tall
  17. 17.🔢 In a photo-post flow, which comes LAST? (a) add a filter (b) post the photo (c) take the photo (d) open the camera screen
  18. 18.Which of these fits saving in the cloud? (a) your last game level (b) notes to read offline (c) a shared to-do list (d) the sound on/off setting
  19. 19.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let stars = 32; // start at 32
    line 2: stars = stars - 3; // add 3
    line 3: stars = stars * 2; // double it
    line 4: stars = stars - 3; // take away 3
    line 5: show(stars); // show it
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  21. 21.🔢 When you make an app, what comes right after “test the app”? (a) plan the screens (b) release it (c) build the app (d) get an idea
  22. 22.Which of these app ideas solves a real problem? (a) an app that just says hi (b) a button with no action (c) a library due-date alert (d) a blank grey screen
  23. 23.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Pens → Pay → Confirm
    Design B: Home → Item → Menu
  24. 24.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Video”
    2. open “Badges”
    3. open “Video”
    4. open “Video”
    5. open “Help page”
    Which screen are you on now?     (a) Video (b) Lessons (c) Help page (d) Badges
  25. 25.True or false: a cricket run chase is a tool app. (a) False (b) True
  26. 26.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a final design (b) a wireframe
  27. 27.📱 Which one updates from the store: an app or a website? (a) a website (b) an app
  28. 28.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Title: 12 px
    Menu: 21 px
    Hint: 16 px     (a) Title (b) Menu (c) Hint
  29. 29.🎯 Which app would help this user most: a student who often misses the school bus? (a) a water reminder (b) a big-text reader (c) a bus tracker (d) a recipe finder
  30. 30.🎨 Is this about UI or UX: how many taps it takes? (a) UI (b) UX
  31. 31.🔢 In a sign-up flow, what comes right after “type name and email”? (a) make a password (b) open the app (c) tap “Sign up” (d) enter the code sent
  32. 32.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) log a glass of water (b) share your streak (c) see today’s total (d) set a reminder time
  33. 33.🗒️ Version 1 of a water reminder must be ready in 8 days. How many days are left for extras after the must-haves?
    set a reminder time: 1 days
    log a glass of water: 1 days
    see today’s total: 2 days
  34. 34.✏️ Is this true of a wireframe or of a final design: shows the real fonts? (a) a wireframe (b) a final design
  35. 35.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(15));
  36. 36.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(11));
  37. 37.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age <= 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(7) → expected 50
    Test 2: price(17) → expected 100
    Test 3: price(11) → expected 100
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 60 px tall
    Cancel button: 36 px tall     (a) Start (b) Cancel (c) Send
  39. 39.🔀 Which badge does this quiz app show?
    let marks = 54;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Bronze (c) Silver
  40. 40.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 17 px
    Hint: 20 px
    Label: 10 px

Answer key

  1. False
  2. real users
  3. persona
  4. 2
  5. a text box
  6. Cancel
  7. dead end
  8. a website
  9. in the cloud
  10. location
  11. 4
  12. a named box for a value
  13. 41
  14. 4
  15. 82
  16. 3
  17. post the photo
  18. a shared to-do list
  19. 55
  20. 4
  21. release it
  22. a library due-date alert
  23. 3
  24. Help page
  25. False
  26. a final design
  27. an app
  28. Title
  29. a bus tracker
  30. UX
  31. make a password
  32. share your streak
  33. 4
  34. a final design
  35. 45
  36. 22
  37. 50
  38. Cancel
  39. Silver
  40. 1

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