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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 916 · 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: a clear word like Save is good button design. (a) True (b) False
  2. 2.🧩 What does a button do when you tap it? (a) starts an action (b) shows the time (c) changes the phone (d) saves the battery
  3. 3.🔁 What does a loop do? (a) draws icons (b) saves photos (c) repeats code (d) deletes code
  4. 4.True or false: a class leaderboard fits saving on the phone. (a) True (b) False
  5. 5.🧩 What do we call one full page of an app? (a) a screen (b) a battery (c) a variable (d) a cable
  6. 6.✏️ Why draw a wireframe before coding? (a) it adds colours (b) it saves data (c) changes are quick (d) it runs the app
  7. 7.🔁 What number does this code show?
    let marks = [39, 42, 11];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
  8. 8.💾 What number does this code show?
    let songs = ["Kites", "Rain"];
    songs.push("Sunrise");
    songs.push("Ocean");
    show(songs.length);
  9. 9.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(3) + points(3));
  10. 10.👆 The user taps the button 5 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  11. 11.True or false: notes to read offline fits saving on the phone. (a) True (b) False
  12. 12.🔀 What does this sign-up rule show?
    let age = 13;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Ask a parent (b) Welcome!
  13. 13.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 10 votes
    wasting pocket money: 3 votes
    forgetting homework: 17 votes     (a) forgetting homework (b) missing the bus (c) wasting pocket money
  14. 14.👆 The user taps the button 7 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) ON (b) OFF
  15. 15.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Pens → Pay → Address → Menu
    Design B: Home → Address → Pay → Results
  16. 16.🔍 Which is the odd one out? (a) the button colours (b) the theme colours (c) the screen layout (d) how users feel after
  17. 17.✏️ Do wireframes usually show the final colours? (a) Yes (b) No
  18. 18.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Match report”
    2. tap the Me tab
    3. open “Video”
    Which screen are you on now?     (a) Quiz (b) Lessons (c) Video (d) Match report
  19. 19.💾 What does this code show? (Positions start at 0.)
    let notes = ["Science", "Art", "Music", "Sports", "Maths"];
    show(notes[1]);     (a) Sports (b) Art (c) Science (d) Music
  20. 20.👥 A cricket club app has 50 players, 110 coaches and 280 fans as users. How many more fans than players are there?
  21. 21.👥 A library app has 60 readers, 105 librarians and 25 volunteers as users. How many more librarians than volunteers are there?
  22. 22.👆 What kind of event is this: a finger hits Like? (a) a text event (b) a tap event (c) a timer event (d) a load event
  23. 23.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Order Snacks
    [switch] Remind me
    [button] Help
    [text box] Subject
    [text box] Age
    [text box] Email
    [button] Send
    [button] Next
  24. 24.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] New Note
    [button] Cancel
    [switch] Show hints
    [button] Start
    [text box] Name
    [text box] Due date
    [button] Help
  25. 25.🧩 How many buttons does this app screen have?
    [title] Sign Up
    [button] Back
    [text box] Due date
    [text box] Email
    [switch] Dark mode
    [text box] Subject
    [button] Send
  26. 26.🧪 What is the ACTUAL result of Test 1?
    🚚 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(700) → expected 0
    Test 2: delivery(850) → expected 0
    Test 3: delivery(400) → expected 40
  27. 27.🔢 In a quiz-app flow, which comes LAST? (a) tap “Start quiz” (b) read a question (c) pick an answer (d) see the final score
  28. 28.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hi, " + nameBox.text + "!";
    };     (a) Hi, nameBox.text! (b) Hi, Riya! (c) Riya (d) Hi!
  29. 29.🚀 Which of these versions is the OLDEST?
    2.5.9, 1.22.5, 2.11.5, 2.2.3     (a) 2.2.3 (b) 2.5.9 (c) 1.22.5 (d) 2.11.5
  30. 30.🔍 Which is the odd one out? (a) a cricket run chase (b) a puzzle with levels (c) a times-table quiz (d) a racing challenge
  31. 31.🔐 Is this permission request fair or too much: torch → contacts? (a) fair (b) too much
  32. 32.🔁 list.length tells you ___. (a) the last item (b) how many items it has (c) the first item (d) the biggest item
  33. 33.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    wasting pocket money: 11 votes
    forgetting homework: 23 votes
    losing water bottles: 5 votes     (a) losing water bottles (b) forgetting homework (c) wasting pocket money
  34. 34.Which of these is an input? (a) sorting the scores (b) a buzz (vibration) (c) a pop-up message (d) typing your age
  35. 35.🔢 In a quiz-app flow, what comes right after “pick an answer”? (a) see the final score (b) read a question (c) tap “Start quiz” (d) see if it is right
  36. 36.🗒️ Version 1 of a bus tracker must be ready in 10 days. How many days are left for extras after the must-haves?
    see where the bus is: 4 days
    show arrival time: 1 days
    pick your bus stop: 4 days
  37. 37.♿ A screen has 11 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?
  38. 38.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 46; // start at 46
    line 2: points = points - 3; // take away 2
    line 3: points = points + 2; // add 2
    line 4: show(points); // show it
  39. 39.Which of these is true of a tab bar? (a) shows 3 to 5 icons (b) goes to the last screen (c) hides extra links (d) undoes one move
  40. 40.🔍 Which is the odd one out? (a) speaking a command (b) a result on screen (c) typing your age (d) taking a photo

Answer key

  1. True
  2. starts an action
  3. repeats code
  4. False
  5. a screen
  6. changes are quick
  7. 0
  8. 4
  9. 70
  10. 3
  11. True
  12. Welcome!
  13. forgetting homework
  14. ON
  15. 4
  16. how users feel after
  17. No
  18. Video
  19. Art
  20. 230
  21. 80
  22. a tap event
  23. 4
  24. 3
  25. 2
  26. 0
  27. see the final score
  28. Hi, Riya!
  29. 1.22.5
  30. a times-table quiz
  31. too much
  32. how many items it has
  33. forgetting homework
  34. typing your age
  35. see if it is right
  36. 1
  37. 4
  38. 46
  39. shows 3 to 5 icons
  40. a result on screen

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