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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 630 · 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.Which of these fits saving in the cloud? (a) a class leaderboard (b) notes to read offline (c) your last game level (d) a draft you are typing
  2. 2.True or false: you list what users need at the idea stage. (a) True (b) False
  3. 3.🔢 In a food-order flow, which comes first: “pick a dish” or “track the order”? (a) track the order (b) pick a dish
  4. 4.🗒️ In MVP, the M stands for ___. (a) mobile (b) minimum (c) maximum (d) music
  5. 5.True or false: a website is installed on a phone. (a) False (b) True
  6. 6.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Size → Results → Menu → Pay → Address
    Design B: Home → Size → Offers → Pay → Pens
  7. 7.🖼️ How many parts (boxes) does this wireframe have?
    [ Save button ]
    [ big picture ]
    [ list of items ]
    [ filter buttons ]
    [ title text ]
  8. 8.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 33; // start at 33
    line 2: score = score + 4; // add 4
    line 3: score = score + 3; // add 3
    line 4: score = score + 5; // add 4
    line 5: show(score); // show it     (a) line 4 (b) line 2 (c) line 1 (d) line 3
  9. 9.🔢 When you make an app, what comes right after “plan the screens”? (a) get an idea (b) release it (c) test the app (d) build the app
  10. 10.🧑 Who is an app really made for? (a) its icon (b) its coder only (c) its charger (d) its users
  11. 11.🧩 Which of these is a button on this screen?
    [title] New Note
    [slider] Brightness
    [text box] Subject
    [button] Cancel     (a) Brightness (b) Cancel (c) Subject
  12. 12.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Pens → Shop → Size → Confirm → Search
    Design B: Home → Search → Address → Cart → Offers → Pay → Confirm
  13. 13.👆 The user taps the button 2 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
  14. 14.True or false: the log-in page is a screen. (a) True (b) False
  15. 15.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 700 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 700) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(550) → expected 40
    Test 2: delivery(900) → expected 0
    Test 3: delivery(700) → expected 0     (a) Test 1 (b) Test 2 (c) Test 3
  16. 16.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
  17. 17.🚀 Which of these versions is the NEWEST?
    1.15.2, 0.28.4, 1.6.3, 1.2.5     (a) 0.28.4 (b) 1.2.5 (c) 1.6.3 (d) 1.15.2
  18. 18.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 8 or more right answers.
    function result(right) {
      if (right > 8) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(7) → expected Try again
    Test 2: result(10) → expected Pass
    Test 3: result(8) → expected Pass     (a) Test 1 (b) Test 2 (c) Test 3
  19. 19.🗂️ What kind of app is a times-table quiz? (a) a game (b) a learning app (c) a health app (d) a tool app
  20. 20.🗒️ Version 1 of a homework planner must be ready in 11 days. How many days are left for extras after the must-haves?
    add a homework task: 4 days
    set a due date: 1 days
    see tasks by day: 2 days
  21. 21.🧩 How many buttons does this app screen have?
    [title] Edit Profile
    [button] Next
    [button] Back
    [slider] Volume
    [text box] Phone
    [switch] Remind me
    [button] Done
  22. 22.🖼️ How many parts (boxes) does this wireframe have?
    [ big picture ]
    [ search box ]
    [ tab bar ]
    [ list of items ]
    [ Add button ]
  23. 23.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 31; // start at 31
    line 2: score = score + 6; // add 6
    line 3: score = score * 2; // double it
    line 4: score = score * 3; // double it
    line 5: show(score); // show it     (a) line 3 (b) line 1 (c) line 2 (d) line 4
  24. 24.🔁 What number does this code show?
    let scores = [36, 29, 99, 97];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 40) {
        count = count + 1;
      }
    }
    show(count);
  25. 25.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 60;
    }
    show(fee(7) + fee(2));
  26. 26.🔍 Which is the odd one out? (a) captions on videos (b) labels on every icon (c) sudden loud sounds (d) text that can grow
  27. 27.🗒️ Version 1 of a bus tracker must be ready in 13 days. How many days are left for extras after the must-haves?
    see where the bus is: 2 days
    show arrival time: 2 days
    pick your bus stop: 3 days
  28. 28.📱 Which one updates from the store: an app or a website? (a) an app (b) a website
  29. 29.👆 What kind of event is this: the search box changes? (a) a timer event (b) a tap event (c) a text event (d) a load event
  30. 30.🔁 What number does this code show?
    let marks = [52, 82, 88, 23];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.📱 Which one is installed on a phone: an app or a website? (a) an app (b) a website
  33. 33.True or false: tapping a button is an input. (a) True (b) False
  34. 34.🔐 Which permission does a party-invite app for friends really need? (a) location (b) the microphone (c) the camera (d) contacts
  35. 35.🔢 After an app is released, which comes first: “read user reviews” or “test it again”? (a) read user reviews (b) test it again
  36. 36.🔢 In a sign-up flow, which comes first: “enter the code sent” or “open the app”? (a) open the app (b) enter the code sent
  37. 37.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 30;
    }
    show(fee(11) + fee(11));
  38. 38.♿ Why add captions to videos? (a) to slow them down (b) to add colour (c) so anyone can follow (d) to hide the sound
  39. 39.🗒️ A to-do app with no “add a task” feature is ___. (a) a nice extra (b) missing a must-have (c) ready to release (d) well planned
  40. 40.🧪 What is the ACTUAL result of Test 2?
    🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 400) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(200) → expected 40
    Test 2: delivery(400) → expected 0
    Test 3: delivery(700) → expected 0

Answer key

  1. a class leaderboard
  2. True
  3. pick a dish
  4. minimum
  5. False
  6. 1
  7. 5
  8. line 4
  9. build the app
  10. its users
  11. Cancel
  12. 6
  13. OFF
  14. True
  15. Test 3
  16. input
  17. 1.15.2
  18. Test 3
  19. a learning app
  20. 4
  21. 3
  22. 5
  23. line 4
  24. 2
  25. 60
  26. sudden loud sounds
  27. 6
  28. an app
  29. a text event
  30. 2
  31. easy to read
  32. an app
  33. True
  34. contacts
  35. read user reviews
  36. open the app
  37. 60
  38. so anyone can follow
  39. missing a must-have
  40. 40

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