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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 295 · 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.🔀 With if / else if / else, how many parts run? (a) only one (b) two (c) none (d) all of them
  2. 2.🐞 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 - 6; // take away 4
    line 3: score = score - 3; // take away 3
    line 4: score = score - 3; // take away 3
    line 5: show(score); // show it     (a) line 1 (b) line 4 (c) line 3 (d) line 2
  3. 3.Which of these is about UX (the experience)? (a) the font size (b) the icon shapes (c) how users feel after (d) the screen layout
  4. 4.🔀 What does if / else let an app do? (a) draw a screen (b) save a photo (c) pick one of two actions (d) repeat forever
  5. 5.🔍 Which is the odd one out? (a) list what users need (b) talk to possible users (c) spot a problem to solve (d) write down the bugs
  6. 6.📱 Which one opens from a link: an app or a website? (a) an app (b) a website
  7. 7.🔢 In a sign-up flow, what comes right after “enter the code sent”? (a) make a password (b) tap “Sign up” (c) see the home screen (d) open the app
  8. 8.📱 Which one is installed on a phone: an app or a website? (a) an app (b) a website
  9. 9.🧩 What do we call one full page of an app? (a) a cable (b) a screen (c) a variable (d) a battery
  10. 10.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 7 or more right answers.
    function result(right) {
      if (right > 7) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(11) → expected Pass
    Test 2: result(9) → expected Pass
    Test 3: result(4) → expected Try again
  11. 11.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    forgetting birthdays: 20 votes
    losing water bottles: 19 votes
    wasting pocket money: 4 votes     (a) wasting pocket money (b) forgetting birthdays (c) losing water bottles
  12. 12.💾 Where should the app save a class leaderboard: on the phone or in the cloud? (a) on the phone (b) in the cloud
  13. 13.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 21 votes
    forgetting birthdays: 8 votes
    losing water bottles: 4 votes     (a) losing water bottles (b) forgetting birthdays (c) missing the bus
  14. 14.💡 Which is a problem statement? (a) “Add a logo” (b) “Kids forget homework” (c) “Make it fast” (d) “Use blue buttons”
  15. 15.True or false: tap to Save is a button. (a) False (b) True
  16. 16.Which of these is about UX (the experience)? (a) the theme colours (b) the button colours (c) the screen layout (d) how many taps it takes
  17. 17.🔀 In a good flow, each screen should lead to ___. (a) a dead end (b) a random page (c) the same screen (d) a clear next step
  18. 18.🧪 Who else should try an app before release? (a) only the coder (b) nobody (c) the app icon (d) real users
  19. 19.🗒️ A to-do app with no “add a task” feature is ___. (a) ready to release (b) missing a must-have (c) a nice extra (d) well planned
  20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total);     (a) line 4 (b) line 2 (c) line 3 (d) line 1
  21. 21.True or false: a party-invite app for friends needs your contacts. (a) True (b) False
  22. 22.Which of these is an input? (a) the log-in page (b) tap to Start (c) a box to type a name (d) tap to Send
  23. 23.🧭 Which part of navigation switches main sections? (a) the back button (b) a menu button (c) a tab bar
  24. 24.🔍 Which is the odd one out? (a) the icon shapes (b) the screen layout (c) the button colours (d) how many taps it takes
  25. 25.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    };     (a) Hello! (b) Riya (c) Hello, Riya! (d) Hello, nameBox.text!
  26. 26.👆 The user taps the button 4 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  27. 27.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [button] Cancel
    [button] Back
    [button] Send
    [switch] Remind me
    [text box] Email     (a) Remind me (b) Back (c) Email
  28. 28.🔀 What does this battery rule show?
    let battery = 31;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Battery OK (b) Low battery
  29. 29.♿ Accessibility means an app works for ___. (a) everyone (b) only the coder (c) only experts (d) nobody
  30. 30.🔍 Which is the odd one out? (a) labels on every icon (b) big touch targets (c) text that can grow (d) colour as the only clue
  31. 31.🗒️ What is a must-have feature? (a) a nice extra (b) a colour theme (c) one the app cannot skip (d) a sound effect
  32. 32.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(6));
  33. 33.✏️ Is this true of a wireframe or of a final design: has no real colours? (a) a final design (b) a wireframe
  34. 34.🔐 Which permission does a weather-near-me app really need? (a) the microphone (b) location (c) contacts (d) the camera
  35. 35.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [button] Save
    [button] Help
    [button] Done
    [slider] Brightness
    [text box] Subject     (a) Brightness (b) Subject (c) Done
  36. 36.True or false: a final design shows the real fonts. (a) False (b) True
  37. 37.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) pick your bus stop (b) see where the bus is (c) show arrival time (d) change the bus icon
  38. 38.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Video”
    2. tap Back
    3. open “Video”
    4. open “Score card”
    How many times must you tap Back to reach the main screen of this tab?
  39. 39.👆 The user taps the button 2 times. What number does the label show now?
    let lives = 7;
    button.onTap = function () {
      lives = lives + 4;
      label.text = lives;
    };
  40. 40.🗒️ Version 1 of a quiz app must be ready in 9 days. How many days are left for extras after the must-haves?
    show a question: 2 days
    check the answer: 3 days
    show the score: 4 days

Answer key

  1. only one
  2. line 2
  3. how users feel after
  4. pick one of two actions
  5. write down the bugs
  6. a website
  7. see the home screen
  8. an app
  9. a screen
  10. 3
  11. forgetting birthdays
  12. in the cloud
  13. missing the bus
  14. “Kids forget homework”
  15. True
  16. how many taps it takes
  17. a clear next step
  18. real users
  19. missing a must-have
  20. line 3
  21. True
  22. a box to type a name
  23. a tab bar
  24. how many taps it takes
  25. Hello, Riya!
  26. 3
  27. Back
  28. Battery OK
  29. everyone
  30. colour as the only clue
  31. one the app cannot skip
  32. 18
  33. a wireframe
  34. location
  35. Done
  36. True
  37. change the bus icon
  38. 2
  39. 15
  40. 0

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