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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 659 · 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.⚙️ What number does this app show?
    let bill = 78; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
  2. 2.🔢 In a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) open the app (c) type name and email (d) make a password
  3. 3.🔍 Which is the odd one out? (a) a step counter (b) a water reminder (c) a sleep tracker (d) a torch
  4. 4.🔁 In for (let i = 0; i < 3; i++), which values does i take? (a) 0, 1, 2 (b) 3 (c) 0, 1, 2, 3 (d) 1, 2, 3
  5. 5.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 48; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 3 (b) line 4 (c) line 1 (d) line 2
  6. 6.True or false: a website needs no installing. (a) False (b) True
  7. 7.🧩 Which of these is a button on this screen?
    [title] Edit Profile
    [button] Done
    [text box] Notes
    [switch] Dark mode
    [text box] Email
    [text box] Phone
    [slider] Volume     (a) Phone (b) Done (c) Email (d) Notes
  8. 8.🔀 What does this battery rule show?
    let battery = 73;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  9. 9.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Map”
    2. tap the Search tab
    3. open “Video”
    Which screen are you on now?     (a) Home (b) Video (c) Search (d) Map
  10. 10.💾 What number does this code show?
    let songs = ["Monsoon", "Kites", "Rain", "Stars"];
    songs.push("Sunrise");
    show(songs.length);
  11. 11.💾 What is a variable? (a) a type of screen (b) a named box for a value (c) a phone setting (d) a picture
  12. 12.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Aman"));     (a) Welcome, name! (b) greet (c) Aman (d) Welcome, Aman!
  13. 13.🧭 What does the back button usually do? (a) deletes the page (b) goes to the last screen (c) closes all apps (d) opens settings
  14. 14.🔐 Which permission does a party-invite app for friends really need? (a) the microphone (b) location (c) the camera (d) contacts
  15. 15.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) before anything (c) on day one (d) never
  16. 16.🗒️ Version 1 of a quiz app must be ready in 12 days. How many days are left for extras after the must-haves?
    show a question: 4 days
    check the answer: 1 days
    show the score: 4 days
  17. 17.🛠️ At which stage do you put it on an app store? (a) the build stage (b) the idea stage (c) the release stage (d) the plan stage
  18. 18.🔁 A loop over a list of 5 items runs its body how many times? (a) 6 (b) 5 (c) 4 (d) 1
  19. 19.📊 Survey: which problem bugs you most? How many more votes did “losing water bottles” get than “forgetting birthdays”?
    forgetting birthdays: 7 votes
    no quiet study place: 10 votes
    losing water bottles: 22 votes
  20. 20.🧰 What is a function? (a) a named block of code (b) a type of phone (c) a list of colours (d) a screen size
  21. 21.Which of these is processing? (a) a beep sound (b) tapping a button (c) a result on screen (d) checking a password
  22. 22.👆 The user types Kabir in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Well done, " + nameBox.text + "!";
    };     (a) Well done, Kabir! (b) Well done, nameBox.text! (c) Kabir (d) Well done!
  23. 23.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
    function price(age) {
      if (age <= 14) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 50
    Test 2: price(18) → expected 100
    Test 3: price(17) → expected 100
  24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 13; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres);     (a) line 2 (b) line 1 (c) line 3
  25. 25.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) helps everyone (b) makes it harder
  26. 26.🗒️ Version 1 of a quiz app must be ready in 11 days. How many days are left for extras after the must-haves?
    show a question: 1 days
    check the answer: 4 days
    show the score: 5 days
  27. 27.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Help page”
    2. tap Back
    3. open “Map”
    4. tap the Lessons tab
    5. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
  28. 28.🔐 Which permission does a speak-to-type notes app really need? (a) location (b) the camera (c) contacts (d) the microphone
  29. 29.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age <= 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(12) → expected 100
    Test 2: price(9) → expected 100
    Test 3: price(6) → expected 50
  30. 30.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “losing water bottles”?
    no quiet study place: 19 votes
    losing water bottles: 3 votes
    forgetting homework: 9 votes
  31. 31.🎨 Is this about UI or UX: the icon shapes? (a) UX (b) UI
  32. 32.🔀 In this course’s code, which sign tests “is equal to”? (a) => (b) !== (c) = (d) ===
  33. 33.👥 A school app has 40 students, 210 teachers and 125 parents as users. How many users does it have in all?
  34. 34.💡 Which app idea solves this problem: the library is always full? (a) a homework planner (b) a bill splitter (c) a lost-and-found board (d) a study-room finder
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Done button: 64 px tall
    Help button: 48 px tall
    Back button: 48 px tall     (a) Help (b) Next (c) Done (d) Back
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Back button: 32 px tall
    Send button: 64 px tall
  37. 37.Which of these is processing? (a) tapping a button (b) a beep sound (c) a buzz (vibration) (d) adding up a bill
  38. 38.🧭 Which part of navigation goes to the last screen? (a) a tab bar (b) a menu button (c) the back button
  39. 39.🚀 A privacy policy tells users ___. (a) the screen size (b) what data is collected (c) the app’s price (d) the app’s colours
  40. 40.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Quiz tab
    2. tap the Quiz tab
    3. open “Friend list”
    4. tap the Me tab
    Which screen are you on now?     (a) Friend list (b) Lessons (c) Quiz (d) Me

Answer key

  1. 26
  2. open the app
  3. a torch
  4. 0, 1, 2
  5. line 3
  6. True
  7. Done
  8. Battery OK
  9. Video
  10. 5
  11. a named box for a value
  12. Welcome, Aman!
  13. goes to the last screen
  14. contacts
  15. after the must-haves
  16. 3
  17. the release stage
  18. 5
  19. 15
  20. a named block of code
  21. checking a password
  22. Well done, Kabir!
  23. 3
  24. line 2
  25. helps everyone
  26. 1
  27. 1
  28. the microphone
  29. 50
  30. 16
  31. UI
  32. ===
  33. 375
  34. a study-room finder
  35. Next
  36. 1
  37. adding up a bill
  38. the back button
  39. what data is collected
  40. Me

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