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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 442 · 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 is a user flow? (a) the path through screens (b) a colour theme (c) a type of font (d) a charging cable
  2. 2.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Riya"));     (a) greet (b) Riya (c) Welcome, Riya! (d) Welcome, name!
  3. 3.👆 What kind of event is this: the user types a letter? (a) a load event (b) a tap event (c) a text event (d) a timer event
  4. 4.🚀 What should an app ask for only when it really needs it? (a) its icon (b) a permission (c) a font (d) its name
  5. 5.Which of these is true of a wireframe? (a) uses the final pictures (b) shows where things go (c) looks like the real app (d) has the real colours
  6. 6.Which of these is true of a wireframe? (a) uses the final pictures (b) has the real colours (c) shows the real fonts (d) has no real colours
  7. 7.🗒️ Version 1 of a water reminder must be ready in 8 days. How many days are left for extras after the must-haves?
    set a reminder time: 4 days
    log a glass of water: 2 days
    see today’s total: 2 days
  8. 8.🧪 One test case fails. Which one?
    🚚 Rule: delivery is free (0) when the order is 300 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 300) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(400) → expected 0
    Test 2: delivery(300) → expected 0
    Test 3: delivery(100) → expected 40     (a) Test 3 (b) Test 2 (c) Test 1
  9. 9.💾 What number does this code show?
    let points = 7;
    points = points - 5;
    points = points + 2;
    show(points);
  10. 10.👆 The user taps the button 4 times. What number does the label show now?
    let stars = 9;
    button.onTap = function () {
      stars = stars + 2;
      label.text = stars;
    };
  11. 11.Which of these is a feature? (a) “I keep missing the bus” (b) a share button (c) “Small text is hard” (d) “I forget my homework”
  12. 12.True or false: a final design looks like the real app. (a) True (b) False
  13. 13.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(5));
  14. 14.🧩 Which part lets the user give the app information? (a) an icon (b) a logo (c) an input (d) a title
  15. 15.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 37; // start at 37
    line 2: coins = coins - 2; // take away 2
    line 3: coins = coins - 6; // take away 5
    line 4: coins = coins * 2; // double it
    line 5: show(coins); // show it     (a) line 2 (b) line 3 (c) line 1 (d) line 4
  16. 16.🔁 What number does this code show?
    let runs = [2, 20, 10];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
  17. 17.🎯 An app for “everyone” with no clear user usually ___. (a) wins every prize (b) is easy to build (c) needs no testing (d) helps nobody well
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 48 px tall
    Send button: 40 px tall
  19. 19.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(5) → expected Pass
    Test 3: result(4) → expected Try again
  20. 20.🔐 Which permission does a bus tracker really need? (a) contacts (b) the microphone (c) the camera (d) location
  21. 21.🔢 In a food-order flow, what comes right after “check the cart”? (a) track the order (b) open the menu (c) pay for the order (d) add it to the cart
  22. 22.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) red on green (d) white on dark green
  23. 23.True or false: a box to type a name is an input. (a) False (b) True
  24. 24.True or false: typing your age is an input. (a) False (b) True
  25. 25.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Me tab
    2. tap the Lessons tab
    3. tap the Quiz tab
    How many times must you tap Back to reach the main screen of this tab?
  26. 26.Which of these is a screen? (a) a slider for volume (b) a switch for dark mode (c) tap to go Next (d) the log-in page
  27. 27.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) share your streak (b) water animations (c) log a glass of water (d) custom alert sounds
  28. 28.🎯 Is this a user need or a feature: “I forget my homework”? (a) a user need (b) a feature
  29. 29.📅 An app team plans for 3 days, builds for 10 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
  30. 30.Which of these requests is fair? (a) timer → your photos (b) camera app → camera (c) calculator → location (d) quiz app → microphone
  31. 31.💡 Which app idea solves this problem: students cannot find a quiet room? (a) a bill splitter (b) a study-room finder (c) a homework planner (d) a lost-and-found board
  32. 32.Which of these is true of the back button? (a) shows 3 to 5 icons (b) opens a list of pages (c) hides extra links (d) goes to the last screen
  33. 33.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 46; // start at 43
    line 2: score = score - 2; // take away 2
    line 3: score = score - 5; // take away 5
    line 4: show(score); // show it
  34. 34.💾 Where should the app save your last game level: on the phone or in the cloud? (a) on the phone (b) in the cloud
  35. 35.True or false: you share the download link at the release stage. (a) False (b) True
  36. 36.Which of these makes the app harder to use? (a) big touch targets (b) strong colour contrast (c) labels on every icon (d) icons with no labels
  37. 37.Which of these is an input? (a) the settings page (b) tap to Save (c) the game-over page (d) a slider for volume
  38. 38.🔁 What number does this code show?
    let scores = [18, 4, 4];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);
  39. 39.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right >= 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(9) → expected Pass
    Test 2: result(7) → expected Pass
    Test 3: result(3) → expected Try again
  40. 40.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input

Answer key

  1. the path through screens
  2. Welcome, Riya!
  3. a text event
  4. a permission
  5. shows where things go
  6. has no real colours
  7. 0
  8. Test 2
  9. 4
  10. 17
  11. a share button
  12. True
  13. 70
  14. an input
  15. line 3
  16. 32
  17. helps nobody well
  18. 1
  19. 2
  20. location
  21. pay for the order
  22. red on green
  23. True
  24. True
  25. 0
  26. the log-in page
  27. log a glass of water
  28. a user need
  29. 9
  30. camera app → camera
  31. a study-room finder
  32. goes to the last screen
  33. 39
  34. on the phone
  35. True
  36. icons with no labels
  37. a slider for volume
  38. 26
  39. 3
  40. input

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