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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 539 · 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 flashcard trainer is a tool app. (a) True (b) False
  2. 2.🔍 Which is the odd one out? (a) colour as the only clue (b) strong colour contrast (c) big touch targets (d) text that can grow
  3. 3.📊 Survey: which problem bugs you most? Which problem should your app solve first?
    missing the bus: 10 votes
    forgetting birthdays: 21 votes
    no quiet study place: 17 votes     (a) missing the bus (b) no quiet study place (c) forgetting birthdays
  4. 4.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 135; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share);     (a) line 3 (b) line 2 (c) line 4 (d) line 1
  5. 5.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Score card”
    2. open “Map”
    3. open “Match report”
    4. tap the Lessons tab
    5. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
  6. 6.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(50, 6));
  7. 7.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
    function price(age) {
      if (age <= 8) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(8) → expected 100
    Test 3: price(7) → expected 50     (a) Test 2 (b) Test 3 (c) Test 1
  8. 8.🧪 How many of these test cases pass?
    🚚 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(450) → expected 40
    Test 2: delivery(700) → expected 0
    Test 3: delivery(650) → expected 0
  9. 9.🧪 What is the actual result of a test? (a) what the app really does (b) the test’s number (c) the app’s name (d) what we hope for
  10. 10.🧩 How many buttons does this app screen have?
    [title] New Note
    [text box] Name
    [button] Done
    [slider] Volume
  11. 11.Which of these fits saving in the cloud? (a) notes to read offline (b) the sound on/off setting (c) chat messages to friends (d) your last game level
  12. 12.✏️ A box with a cross in a wireframe usually means ___. (a) an error (b) a picture goes here (c) delete this (d) a closed app
  13. 13.👆 The user taps the button 5 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
  14. 14.🔀 What does >= mean? (a) less than (b) greater than or equal (c) not equal (d) smaller or equal
  15. 15.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    }     (a) Welcome! (b) Ask a parent
  16. 16.🔁 What number does this code show?
    let scores = [92, 80, 18, 12, 98];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
  17. 17.🚀 In version 2.5.1, which number is the major version? (a) 5 (b) 1 (c) 2 (d) 251
  18. 18.🔢 In a sign-up flow, which comes first: “see the home screen” or “type name and email”? (a) type name and email (b) see the home screen
  19. 19.🚀 Which of these versions is the NEWEST?
    1.2.0, 0.28.4, 1.5.7, 1.19.1     (a) 1.2.0 (b) 0.28.4 (c) 1.5.7 (d) 1.19.1
  20. 20.🗒️ Version 1 of a water reminder must be ready in 11 days. How many days are left for extras after the must-haves?
    set a reminder time: 4 days
    log a glass of water: 1 days
    see today’s total: 3 days
  21. 21.True or false: a free study-room finder solves a real problem. (a) True (b) False
  22. 22.Which of these is true of an app? (a) opens in a web browser (b) opens from a link (c) has a web address (d) updates from the store
  23. 23.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. tap the Lessons tab
    2. tap the Me tab
    3. tap the Me tab
    4. tap the Quiz tab
    5. open “Badges”
    How many times must you tap Back to reach the main screen of this tab?
  24. 24.🔁 What number does this code show?
    let marks = [10, 6, 19];
    let best = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] > best) {
        best = marks[i];
      }
    }
    show(best);
  25. 25.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.👥 A clinic app has 150 patients, 290 doctors and 60 nurses as users. Which user group is the biggest? (a) patients (b) doctors (c) nurses
  27. 27.True or false: a wireframe shows the real fonts. (a) False (b) True
  28. 28.True or false: “big touch targets” makes the app harder to use. (a) False (b) True
  29. 29.📱 The word “app” is short for ___. (a) appointment (b) appetite (c) apparatus (d) application
  30. 30.🧪 What is the ACTUAL result of Test 1?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age < 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(10) → expected 100
    Test 2: price(5) → expected 50
    Test 3: price(9) → expected 100
  31. 31.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 24 votes
    no quiet study place: 9 votes
    wasting pocket money: 8 votes
  32. 32.Which of these requests asks for too much? (a) calling app → contacts (b) map app → location (c) calculator → location (d) camera app → camera
  33. 33.🗒️ The first small, working version of an app is often called an ___. (a) CPU (b) FAQ (c) URL (d) MVP
  34. 34.🔀 Which badge does this quiz app show?
    let marks = 45;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Gold (c) Silver
  35. 35.Which of these is about UI (the look)? (a) how many taps it takes (b) whether users get lost (c) how easy sign-up is (d) the theme colours
  36. 36.🔢 After an app is released, what comes right after “fix and improve”? (a) read user reviews (b) list what to fix (c) release an update (d) test it again
  37. 37.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money received (b) add money spent (c) show the balance (d) pie-chart colours
  38. 38.💾 In most code, the first item of a list is at position ___. (a) 0 (b) 1 (c) 2 (d) 10
  39. 39.True or false: the screen first opens is a load event. (a) False (b) True
  40. 40.🚀 Which version is newer: 2.6.0 or 2.10.0? (a) 2.6.0 (b) 2.10.0

Answer key

  1. False
  2. colour as the only clue
  3. forgetting birthdays
  4. line 3
  5. 1
  6. 300
  7. Test 2
  8. 3
  9. what the app really does
  10. 1
  11. chat messages to friends
  12. a picture goes here
  13. ON
  14. greater than or equal
  15. Ask a parent
  16. 3
  17. 2
  18. type name and email
  19. 1.19.1
  20. 3
  21. True
  22. updates from the store
  23. 1
  24. 19
  25. easy to read
  26. doctors
  27. False
  28. False
  29. application
  30. 100
  31. 41
  32. calculator → location
  33. MVP
  34. Bronze
  35. the theme colours
  36. test it again
  37. pie-chart colours
  38. 0
  39. True
  40. 2.10.0

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