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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 367 · 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 app ideas solves no real problem? (a) a library due-date alert (b) a blank grey screen (c) a bill splitter (d) a free study-room finder
  2. 2.🔁 What number does this code show?
    let runs = [1, 6, 16, 16, 19];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
  3. 3.✏️ Is this true of a wireframe or of a final design: has no real colours? (a) a final design (b) a wireframe
  4. 4.👆 Code that runs when an event happens is called a ___. (a) header (b) headline (c) hashtag (d) handler
  5. 5.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ big picture ]
    [ top bar ]
    [ title text ]
    [ Save button ]
    [ search box ]
    [ list of items ]     (a) Save button (b) list of items (c) big picture (d) title text
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 64 px tall
    Done button: 40 px tall
  7. 7.🔍 Which is the odd one out? (a) a step counter (b) a water reminder (c) a unit converter (d) a sleep tracker
  8. 8.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age < 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 50
    Test 2: price(14) → expected 100
    Test 3: price(15) → expected 100
  9. 9.📴 Which of these can often still work with no internet? (a) an installed app (b) an online search (c) a video call (d) a new website
  10. 10.🔢 After an app is released, what comes right after “list what to fix”? (a) read user reviews (b) fix and improve (c) test it again (d) release an update
  11. 11.♿ A screen has 5 icon buttons. Only 1 of them have a text label for screen readers. How many still need a label?
  12. 12.True or false: an alarm clock is a tool app. (a) True (b) False
  13. 13.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) share tasks to friends (b) see tasks by day (c) pick a theme colour (d) earn stickers
  14. 14.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 20;
    }
    show(fee(8) + fee(6));
  15. 15.🧩 How many buttons does this app screen have?
    [title] Order Snacks
    [text box] Name
    [button] Done
    [button] Next
    [text box] Due date
  16. 16.🔐 Which permission does a voice recorder really need? (a) contacts (b) the microphone (c) location (d) the camera
  17. 17.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 35; // start at 34
    line 2: score = score + 4; // add 4
    line 3: score = score - 5; // take away 5
    line 4: show(score); // show it     (a) line 3 (b) line 1 (c) line 2
  18. 18.🔀 Which badge does this quiz app show?
    let marks = 41;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Gold (b) Silver (c) Bronze
  19. 19.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Help page”
    2. open “Video”
    3. tap the Chat tab
    4. tap the Settings tab
    Which screen are you on now?     (a) Feed (b) Settings (c) Help page (d) Video
  20. 20.🛠️ At which stage do you talk to possible users? (a) the plan stage (b) the test stage (c) the release stage (d) the idea stage
  21. 21.📱 Which one is installed on a phone: an app or a website? (a) an app (b) a website
  22. 22.🔀 What does this PIN rule show?
    let pin = "65787";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) PIN saved (b) Use 4 digits
  23. 23.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 21 votes
    wasting pocket money: 10 votes
    no quiet study place: 3 votes     (a) wasting pocket money (b) no quiet study place (c) missing the bus
  24. 24.🐞 Finding and fixing bugs is called ___. (a) debugging (b) downloading (c) designing (d) decorating
  25. 25.🎯 An app for “everyone” with no clear user usually ___. (a) is easy to build (b) wins every prize (c) helps nobody well (d) needs no testing
  26. 26.🗒️ The first small, working version of an app is often called an ___. (a) FAQ (b) CPU (c) MVP (d) URL
  27. 27.🔐 Is this permission request fair or too much: calculator → location? (a) fair (b) too much
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 64 px tall
    Send button: 32 px tall
  29. 29.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.📊 Survey: which problem bugs you most? How many more votes did “wasting pocket money” get than “missing the bus”?
    losing water bottles: 6 votes
    missing the bus: 5 votes
    wasting pocket money: 12 votes
  31. 31.✏️ Is this true of a wireframe or of a final design: has the real colours? (a) a wireframe (b) a final design
  32. 32.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(24));
  33. 33.🚀 Which version is newer: 4.2.7 or 4.2.14? (a) 4.2.14 (b) 4.2.7
  34. 34.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 13, and 100 for everyone else.
    function price(age) {
      if (age <= 13) {
        return 50;
      }
      return 100;
    }
    Test 1: price(14) → expected 100
    Test 2: price(17) → expected 100
    Test 3: price(11) → expected 50
  35. 35.🔢 In a sign-up flow, what comes right after “type name and email”? (a) tap “Sign up” (b) enter the code sent (c) open the app (d) make a password
  36. 36.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 48; // start at 48
    line 2: stars = stars + 5; // add 5
    line 3: stars = stars + 4; // add 2
    line 4: stars = stars + 2; // add 2
    line 5: show(stars); // show it
  37. 37.💾 Which can hold many values in order? (a) a switch (b) a list (c) a single number (d) a button
  38. 38.💡 After a survey, which need should version 1 solve? (a) the most common need (b) a random need (c) the rarest need (d) the newest trend
  39. 39.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) helps everyone (b) makes it harder
  40. 40.True or false: a blank grey screen solves a real problem. (a) False (b) True

Answer key

  1. a blank grey screen
  2. 19
  3. a wireframe
  4. handler
  5. title text
  6. 2
  7. a unit converter
  8. 3
  9. an installed app
  10. fix and improve
  11. 4
  12. True
  13. see tasks by day
  14. 40
  15. 2
  16. the microphone
  17. line 1
  18. Bronze
  19. Settings
  20. the idea stage
  21. an app
  22. Use 4 digits
  23. missing the bus
  24. debugging
  25. helps nobody well
  26. MVP
  27. too much
  28. 2
  29. easy to read
  30. 7
  31. a final design
  32. 48
  33. 4.2.14
  34. 100
  35. make a password
  36. 57
  37. a list
  38. the most common need
  39. makes it harder
  40. False

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