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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 691 · 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.🗒️ Why keep version 1 small? (a) to learn from users soon (b) to confuse users (c) to use up storage (d) to look bigger
  2. 2.Which of these is true of a wireframe? (a) uses the final pictures (b) uses plain grey boxes (c) looks like the real app (d) has the real colours
  3. 3.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Results → Size
    Design B: Home → Confirm → Search → Cart     (a) Design A (b) Design B
  4. 4.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 600 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 600) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(500) → expected 40
    Test 2: delivery(700) → expected 0
    Test 3: delivery(800) → expected 0
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  6. 6.🔁 What number does this code show?
    let runs = [11, 18, 1, 6];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
  7. 7.🔐 Is this permission request fair or too much: voice notes → microphone? (a) too much (b) fair
  8. 8.🗒️ A to-do app with no “add a task” feature is ___. (a) missing a must-have (b) ready to release (c) a nice extra (d) well planned
  9. 9.🧪 A test case is an input together with its ___. (a) expected result (b) screen colour (c) app icon (d) font size
  10. 10.🔀 What number does this shop app show?
    let total = 350;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  11. 11.👆 The user taps the button 5 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    };     (a) OFF (b) ON
  12. 12.🎯 Why learn about users before you build? (a) to pick a logo (b) to slow it down (c) to make it longer (d) to build what they need
  13. 13.True or false: the button colours is about UI (the look). (a) False (b) True
  14. 14.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Chat tab
    2. tap the Chat tab
    3. open “Match report”
    Which screen are you on now?     (a) Settings (b) Chat (c) Match report (d) Feed
  15. 15.🗒️ When should nice-to-have features be built? (a) after the must-haves (b) never (c) on day one (d) before anything
  16. 16.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 47; // start at 47
    line 2: lives = lives * 3; // double it
    line 3: lives = lives * 2; // double it
    line 4: show(lives); // show it     (a) line 1 (b) line 3 (c) line 2
  17. 17.True or false: a shared to-do list fits saving on the phone. (a) True (b) False
  18. 18.👥 A library app has 90 readers, 175 librarians and 155 volunteers as users. Which user group is the biggest? (a) readers (b) volunteers (c) librarians
  19. 19.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 20 votes
    losing water bottles: 15 votes
    forgetting homework: 18 votes
  20. 20.🐞 After fixing a bug you should ___. (a) test it again (b) never test (c) delete the test (d) release at once
  21. 21.🧰 What does this code show?
    function greet(name) {
      return "Hi, " + name + "!";
    }
    show(greet("Zoya"));     (a) Zoya (b) Hi, name! (c) greet (d) Hi, Zoya!
  22. 22.Which of these is a button? (a) the settings page (b) your friends list (c) today’s step count (d) tap to Send
  23. 23.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(60, 6));
  24. 24.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
  25. 25.🔀 What does this battery rule show?
    let battery = 96;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  26. 26.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Pens → Cart → Confirm → Offers → Size → Item
    Design B: Home → Cart → Search → Shop
  27. 27.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 50;
    }
    show(fee(11) + fee(11));
  28. 28.🧩 How many buttons does this app screen have?
    [title] Edit Profile
    [button] Cancel
    [text box] Due date
    [button] Save
    [button] Help
    [switch] Dark mode
  29. 29.🗒️ You are planning version 1 of a bus tracker. Which feature is a MUST-HAVE? (a) see where the bus is (b) change the bus icon (c) rate the driver (d) a dark mode
  30. 30.🔁 What does a loop do? (a) saves photos (b) draws icons (c) repeats code (d) deletes code
  31. 31.🗒️ In MVP, the M stands for ___. (a) mobile (b) minimum (c) maximum (d) music
  32. 32.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “wasting pocket money”?
    forgetting homework: 24 votes
    forgetting birthdays: 18 votes
    wasting pocket money: 23 votes
  33. 33.True or false: the log-in page is an input. (a) False (b) True
  34. 34.True or false: buttons almost touching is good button design. (a) True (b) False
  35. 35.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  36. 36.🎯 Is this a user need or a feature: “Small text is hard”? (a) a feature (b) a user need
  37. 37.🧪 Who else should try an app before release? (a) only the coder (b) the app icon (c) nobody (d) real users
  38. 38.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 23 votes
    forgetting homework: 4 votes
    missing the bus: 12 votes
  39. 39.✏️ A box with a cross in a wireframe usually means ___. (a) a closed app (b) a picture goes here (c) delete this (d) an error
  40. 40.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(13));

Answer key

  1. to learn from users soon
  2. uses plain grey boxes
  3. Design A
  4. 3
  5. 24
  6. 36
  7. fair
  8. missing a must-have
  9. expected result
  10. 350
  11. ON
  12. to build what they need
  13. True
  14. Match report
  15. after the must-haves
  16. line 2
  17. False
  18. librarians
  19. 53
  20. test it again
  21. Hi, Zoya!
  22. tap to Send
  23. 360
  24. in the cloud
  25. Battery OK
  26. 6
  27. 100
  28. 3
  29. see where the bus is
  30. repeats code
  31. minimum
  32. 1
  33. False
  34. False
  35. Ask a parent
  36. a user need
  37. real users
  38. 39
  39. a picture goes here
  40. 26

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