← App development final test lesson New set →

App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 124 · 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.👆 The user types Meera in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hi, " + nameBox.text + "!";
    };     (a) Meera (b) Hi, Meera! (c) Hi, nameBox.text! (d) Hi!
  2. 2.True or false: you draw the user flow at the idea stage. (a) False (b) True
  3. 3.👆 The user taps the button 3 times. What number does the label show now?
    let points = 2;
    button.onTap = function () {
      points = points + 2;
      label.text = points;
    };
  4. 4.Which of these happens at the test stage? (a) spot a problem to solve (b) sketch the screens (c) let friends try it (d) list what users need
  5. 5.🔁 What number does this code show?
    let steps = [40, 27, 66, 63, 31];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
  6. 6.♿ A screen has 6 icon buttons. Only 5 of them have a text label for screen readers. How many still need a label?
  7. 7.🚀 In version 2.5.1, which number is the major version? (a) 2 (b) 1 (c) 251 (d) 5
  8. 8.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 46; // start at 43
    line 2: stars = stars * 2; // double it
    line 3: stars = stars + 3; // add 3
    line 4: show(stars); // show it
  9. 9.🗒️ A to-do app with no “add a task” feature is ___. (a) missing a must-have (b) a nice extra (c) ready to release (d) well planned
  10. 10.Which of these happens at the plan stage? (a) let friends try it (b) sketch the screens (c) write the code (d) talk to possible users
  11. 11.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(7));
  12. 12.🛠️ At which stage do you connect the data? (a) the idea stage (b) the release stage (c) the plan stage (d) the build stage
  13. 13.👥 A school app has 220 students, 285 teachers and 185 parents as users. How many more teachers than students are there?
  14. 14.🔢 In a food-order flow, what comes right after “open the menu”? (a) pay for the order (b) pick a dish (c) check the cart (d) add it to the cart
  15. 15.True or false: a finger hits Like is a timer event. (a) False (b) True
  16. 16.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Help page”
    2. open “Friend list”
    3. open “Video”
    How many times must you tap Back to reach the main screen of this tab?
  17. 17.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Map”
    2. tap Back
    3. open “Score card”
    How many times must you tap Back to reach the main screen of this tab?
  18. 18.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Pay → Address → Results → Cart → Menu → Search
    Design B: Home → Shop → Offers → Cart → Pens
  19. 19.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let stars = 35; // start at 35
    line 2: stars = stars * 2; // double it
    line 3: stars = stars - 5; // take away 2
    line 4: stars = stars + 3; // add 3
    line 5: show(stars); // show it
  20. 20.🧪 One test case fails. Which one?
    🎟️ 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(9) → expected 50
    Test 2: price(16) → expected 100
    Test 3: price(10) → expected 100     (a) Test 3 (b) Test 1 (c) Test 2
  21. 21.🗒️ Version 1 of a pocket-money tracker must be ready in 8 days. How many days are left for extras after the must-haves?
    add money received: 3 days
    add money spent: 2 days
    show the balance: 2 days
  22. 22.🧪 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(13) → expected 100
    Test 2: price(12) → expected 50
    Test 3: price(15) → expected 100
  23. 23.🧩 In an app, what is tap to Start? (a) a button (b) an input (c) data (d) a screen
  24. 24.Which of these fits saving on the phone? (a) chat messages to friends (b) a shared to-do list (c) a draft you are typing (d) photos on two devices
  25. 25.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
  26. 26.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 36; // start at 36
    line 2: lives = lives + 5; // add 5
    line 3: lives = lives - 3; // take away 2
    line 4: show(lives); // show it
  27. 27.📱 Which one needs no installing: an app or a website? (a) an app (b) a website
  28. 28.🔐 Which permission does a barcode scanner really need? (a) the camera (b) location (c) the microphone (d) contacts
  29. 29.🔀 What does this PIN rule show?
    let pin = "61570";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) Use 4 digits (b) PIN saved
  30. 30.👥 A clinic app has 40 patients, 65 doctors and 280 nurses as users. Which user group is the biggest? (a) nurses (b) doctors (c) patients
  31. 31.🔍 Which is the odd one out? (a) the theme colours (b) the font size (c) how users feel after (d) the button colours
  32. 32.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) see today’s total (b) custom alert sounds (c) share your streak (d) water animations
  33. 33.🐞 What is a good first step when an app gives a wrong result? (a) buy a new phone (b) add more colours (c) find where it goes wrong (d) delete the app
  34. 34.True or false: a big, easy tap area is good button design. (a) True (b) False
  35. 35.🛠️ At which stage do you list what users need? (a) the release stage (b) the plan stage (c) the test stage (d) the idea stage
  36. 36.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Edit photo”
    2. open “Match report”
    3. open “Map”
    4. open “Edit photo”
    5. tap Back
    Which screen are you on now?     (a) Lessons (b) Edit photo (c) Match report (d) Map
  37. 37.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(5));
  38. 38.🔢 When you make an app, which comes first: “test the app” or “build the app”? (a) build the app (b) test the app
  39. 39.🗒️ Version 1 of a homework planner must be ready in 12 days. How many days are left for extras after the must-haves?
    add a homework task: 3 days
    set a due date: 4 days
    see tasks by day: 2 days
  40. 40.🔢 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

Answer key

  1. Hi, Meera!
  2. False
  3. 8
  4. let friends try it
  5. 0
  6. 1
  7. 2
  8. 89
  9. missing a must-have
  10. sketch the screens
  11. 14
  12. the build stage
  13. 65
  14. pick a dish
  15. False
  16. 3
  17. 1
  18. 2
  19. 71
  20. Test 3
  21. 1
  22. 3
  23. a button
  24. a draft you are typing
  25. output
  26. 38
  27. a website
  28. the camera
  29. Use 4 digits
  30. nurses
  31. how users feel after
  32. see today’s total
  33. find where it goes wrong
  34. True
  35. the idea stage
  36. Map
  37. 10
  38. build the app
  39. 3
  40. type name and email

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students