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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 854 · 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 requests asks for too much? (a) map app → location (b) camera app → camera (c) voice notes → microphone (d) torch → contacts
  2. 2.💾 What number does this code show?
    let friends = ["Zoya", "Meera"];
    friends.push("Riya");
    friends.push("Kabir");
    show(friends.length);
  3. 3.Which of these is a user need? (a) “Small text is hard” (b) a reminder alarm (c) a share button (d) a search bar
  4. 4.🔍 Which is the odd one out? (a) typing your age (b) a pop-up message (c) a buzz (vibration) (d) a result on screen
  5. 5.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Meera", "Arjun", "Kabir"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Kabir (b) Hi, Arjun (c) Hi, Riya (d) Hi, Meera
  6. 6.🧪 What is the actual result of a test? (a) what we hope for (b) the app’s name (c) the test’s number (d) what the app really does
  7. 7.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(2) + points(0));
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 32 px tall
    Send button: 36 px tall
    Next button: 56 px tall
  9. 9.👥 A school app has 240 students, 125 teachers and 180 parents as users. How many more students than teachers are there?
  10. 10.Which of these requests is fair? (a) quiz app → microphone (b) map app → location (c) torch → contacts (d) timer → your photos
  11. 11.👆 The user taps the button 4 times. What number does the label show now?
    let lives = 5;
    button.onTap = function () {
      lives = lives + 2;
      label.text = lives;
    };
  12. 12.True or false: a buzz (vibration) is an output. (a) False (b) True
  13. 13.🎯 Is this a user need or a feature: a share button? (a) a user need (b) a feature
  14. 14.🔀 What number does this shop app show?
    let total = 690;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  15. 15.Which of these is a user need? (a) a search bar (b) “I forget my homework” (c) a reminder alarm (d) a share button
  16. 16.🔢 When you make an app, what comes right after “build the app”? (a) get an idea (b) release it (c) test the app (d) plan the screens
  17. 17.True or false: a water reminder is a game. (a) False (b) True
  18. 18.🐞 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 - 2; // take away 2
    line 3: points = points + 2; // double it
    line 4: show(points); // show it
  19. 19.Which of these makes the app harder to use? (a) labels on every icon (b) text that can grow (c) tiny tap areas (d) big touch targets
  20. 20.Which of these is a user need? (a) a dark mode switch (b) a share button (c) a search bar (d) “I keep missing the bus”
  21. 21.🧪 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(350) → expected 0
    Test 2: delivery(300) → expected 0
    Test 3: delivery(200) → expected 40     (a) Test 2 (b) Test 1 (c) Test 3
  22. 22.True or false: a result on screen is processing. (a) False (b) True
  23. 23.🔢 In a food-order flow, which comes first: “pick a dish” or “check the cart”? (a) pick a dish (b) check the cart
  24. 24.True or false: a website has a home-screen icon. (a) False (b) True
  25. 25.Which of these is true of a website? (a) comes from an app store (b) opens in a web browser (c) updates from the store (d) has a home-screen icon
  26. 26.🔀 What does this battery rule show?
    let battery = 79;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    }     (a) Low battery (b) Battery OK
  27. 27.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
    function price(age) {
      if (age <= 10) {
        return 50;
      }
      return 100;
    }
    Test 1: price(7) → expected 50
    Test 2: price(11) → expected 100
    Test 3: price(10) → expected 100
  28. 28.True or false: a website has a web address. (a) False (b) True
  29. 29.💡 Does an app idea like a blank grey screen solve a real problem? (a) Yes (b) No
  30. 30.True or false: a final design shows where things go. (a) True (b) False
  31. 31.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 30;
    }
    show(fee(1) + fee(3));
  32. 32.🖼️ In this wireframe (top to bottom), what is right above the top bar?
    [ filter buttons ]
    [ list of items ]
    [ search box ]
    [ title text ]
    [ top bar ]     (a) filter buttons (b) title text (c) search box (d) list of items
  33. 33.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) show the score (b) show a question (c) confetti effects (d) check the answer
  34. 34.🐞 After fixing a bug you should ___. (a) test it again (b) delete the test (c) release at once (d) never test
  35. 35.Which of these makes the app harder to use? (a) colour as the only clue (b) labels on every icon (c) strong colour contrast (d) text that can grow
  36. 36.🔁 A loop over a list of 5 items runs its body how many times? (a) 5 (b) 1 (c) 6 (d) 4
  37. 37.🔢 When you make an app, what comes right after “test the app”? (a) get an idea (b) release it (c) plan the screens (d) build the app
  38. 38.🔁 What number does this code show?
    let scores = [3, 11, 19, 9];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
  39. 39.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) white on dark green
  40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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

Answer key

  1. torch → contacts
  2. 4
  3. “Small text is hard”
  4. typing your age
  5. Hi, Kabir
  6. what the app really does
  7. 30
  8. 2
  9. 115
  10. map app → location
  11. 13
  12. True
  13. a feature
  14. 640
  15. “I forget my homework”
  16. test the app
  17. False
  18. 88
  19. tiny tap areas
  20. “I keep missing the bus”
  21. Test 2
  22. False
  23. pick a dish
  24. False
  25. opens in a web browser
  26. Battery OK
  27. 2
  28. True
  29. No
  30. False
  31. 0
  32. title text
  33. confetti effects
  34. test it again
  35. colour as the only clue
  36. 5
  37. release it
  38. 19
  39. white on dark green
  40. line 3

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