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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 800 · 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 is the odd one out? (a) adding up a bill (b) sorting the scores (c) a result on screen (d) checking a password
  2. 2.🔀 What is a user flow? (a) a colour theme (b) a charging cable (c) the path through screens (d) a type of font
  3. 3.True or false: your high score is data. (a) False (b) True
  4. 4.🔁 What number does this code show?
    let runs = [10, 9, 17, 3];
    let best = 0;
    for (let i = 0; i < runs.length; i++) {
      if (runs[i] > best) {
        best = runs[i];
      }
    }
    show(best);
  5. 5.🧪 One test case fails. Which one?
    📝 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(5) → expected Pass
    Test 2: result(3) → expected Try again
    Test 3: result(6) → expected Pass     (a) Test 1 (b) Test 3 (c) Test 2
  6. 6.🔁 What number does this code show?
    let marks = [17, 98, 18];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
  7. 7.True or false: an app has a home-screen icon. (a) False (b) True
  8. 8.💡 Which app idea solves this problem: a patient misses doses? (a) a study-room finder (b) a bill splitter (c) a homework planner (d) a medicine reminder
  9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
  10. 10.🗒️ Version 1 of a bus tracker must be ready in 7 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 2 days
    pick your bus stop: 2 days
  11. 11.🧩 In an app, what is today’s step count? (a) a screen (b) a button (c) data (d) an input
  12. 12.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 8 or more right answers.
    function result(right) {
      if (right >= 8) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(9) → expected Pass
    Test 2: result(12) → expected Pass
    Test 3: result(6) → expected Try again
  13. 13.True or false: a barcode scanner needs the camera. (a) False (b) True
  14. 14.True or false: notes to read offline fits saving on the phone. (a) False (b) True
  15. 15.👆 What kind of event is this: the user taps Play? (a) a timer event (b) a load event (c) a text event (d) a tap event
  16. 16.Which of these is true of an app? (a) is installed on a phone (b) opens from a link (c) has a web address (d) opens in a web browser
  17. 17.🧰 What is a function? (a) a named block of code (b) a screen size (c) a list of colours (d) a type of phone
  18. 18.🔀 What does this PIN rule show?
    let pin = "1990";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) Use 4 digits (b) PIN saved
  19. 19.🧩 Which of these is a button on this screen?
    [title] Order Snacks
    [text box] Phone
    [button] Cancel
    [text box] City
    [button] Help     (a) Help (b) City (c) Phone
  20. 20.💾 What does this code show? (Positions start at 0.)
    let friends = ["Meera", "Kabir", "Arjun", "Aman", "Riya"];
    show(friends[3]);     (a) Aman (b) Meera (c) Arjun (d) Kabir
  21. 21.🔍 Which is the odd one out? (a) strong colour contrast (b) icons with no labels (c) tiny tap areas (d) colour as the only clue
  22. 22.🧩 Which of these is a button on this screen?
    [title] Settings
    [text box] Notes
    [slider] Volume
    [button] Done
    [switch] Sound     (a) Sound (b) Volume (c) Notes (d) Done
  23. 23.✏️ A box with a cross in a wireframe usually means ___. (a) delete this (b) a closed app (c) a picture goes here (d) an error
  24. 24.🧪 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(4) → expected Try again
    Test 2: result(9) → expected Pass
    Test 3: result(7) → expected Pass
  25. 25.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) export to a file (b) add money received (c) pie-chart colours (d) savings stickers
  26. 26.Which of these is true of a final design? (a) is a quick sketch (b) shows where things go (c) shows the real fonts (d) has no real colours
  27. 27.🛠️ At which stage do you talk to possible users? (a) the build stage (b) the plan stage (c) the release stage (d) the idea stage
  28. 28.👆 What kind of event is this: a finger hits Like? (a) a text event (b) a load event (c) a tap event (d) a timer event
  29. 29.🧩 Which of these is a button on this screen?
    [title] Order Snacks
    [button] Next
    [text box] City
    [button] Done
    [text box] Name
    [button] Start
    [switch] Show hints     (a) Name (b) Show hints (c) City (d) Done
  30. 30.🧰 What does this code show?
    function greet(name) {
      return "Welcome, " + name + "!";
    }
    show(greet("Kabir"));     (a) Welcome, name! (b) Kabir (c) Welcome, Kabir! (d) greet
  31. 31.Which of these app ideas solves no real problem? (a) an app that just says hi (b) a lost-and-found board (c) a medicine reminder (d) a bill splitter
  32. 32.True or false: the user presses Save is a text event. (a) False (b) True
  33. 33.👆 The user taps the button 7 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
  34. 34.True or false: a weather-near-me app needs your location. (a) False (b) True
  35. 35.Which of these is a button? (a) the home page of an app (b) your saved notes (c) tap to Start (d) a date picker
  36. 36.💡 An app that tries to do everything at once is usually ___. (a) hard to use (b) very small (c) easy to build (d) finished fast
  37. 37.🧪 What is the ACTUAL result of Test 3?
    🎟️ 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(16) → expected 100
    Test 2: price(15) → expected 100
    Test 3: price(6) → expected 50
  38. 38.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 45; // start at 45
    line 2: score = score - 2; // add 2
    line 3: score = score - 3; // take away 3
    line 4: show(score); // show it     (a) line 2 (b) line 1 (c) line 3
  39. 39.Which of these requests asks for too much? (a) calling app → contacts (b) map app → location (c) camera app → camera (d) timer → your photos
  40. 40.🎯 An app for “everyone” with no clear user usually ___. (a) wins every prize (b) needs no testing (c) is easy to build (d) helps nobody well

Answer key

  1. a result on screen
  2. the path through screens
  3. True
  4. 17
  5. Test 1
  6. 1
  7. True
  8. a medicine reminder
  9. False
  10. 2
  11. data
  12. 3
  13. True
  14. True
  15. a tap event
  16. is installed on a phone
  17. a named block of code
  18. PIN saved
  19. Help
  20. Aman
  21. strong colour contrast
  22. Done
  23. a picture goes here
  24. 2
  25. add money received
  26. shows the real fonts
  27. the idea stage
  28. a tap event
  29. Done
  30. Welcome, Kabir!
  31. an app that just says hi
  32. False
  33. ON
  34. True
  35. tap to Start
  36. hard to use
  37. 50
  38. line 2
  39. timer → your photos
  40. helps nobody well

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