App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 723 · 40 questions

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.

1. 1.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   no quiet study place: 7 votes
   forgetting homework: 18 votes
   missing the bus: 11 votes (a) no quiet study place (b) missing the bus (c) forgetting homework
2. 2.🔢 In a sign-up flow, which comes first: “type name and email” or “make a password”? (a) make a password (b) type name and email
3. 3.🧑 Who is an app really made for? (a) its coder only (b) its charger (c) its users (d) its icon
4. 4.🧪 What is the ACTUAL result of Test 1?
   🎟️ Rule: a ticket costs 50 for children under 14, and 100 for everyone else.
   function price(age) {
     if (age <= 14) {
       return 50;
     }
     return 100;
   }
   Test 1: price(14) → expected 100
   Test 2: price(10) → expected 50
   Test 3: price(15) → expected 100
5. 5.🧭 Which part of navigation sits at the bottom? (a) a tab bar (b) a menu button (c) the back button
6. 6.🔀 What does this battery rule show?
   let battery = 14;
   if (battery < 20) {
     show("Low battery");
   } else {
     show("Battery OK");
   } (a) Battery OK (b) Low battery
7. 7.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
   Design A: Home → Cart → Pay
   Design B: Home → Offers → Address → Menu → Item (a) Design A (b) Design B
8. 8.🧰 What is a function? (a) a screen size (b) a type of phone (c) a list of colours (d) a named block of code
9. 9.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
   1. open “Help page”
   2. tap Back
   3. open “Help page”
   How many times must you tap Back to reach the main screen of this tab?
10. 10.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Zoya", "Meera", "Kabir", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Meera (b) Hi, Arjun (c) Hi, Riya (d) Hi, Zoya
11. 11.🎯 Is this a user need or a feature: a dark mode switch? (a) a user need (b) a feature
12. 12.💾 What does this code show? (Positions start at 0.)
    let songs = ["Sunrise", "Stars", "Rain"];
    show(songs[0]); (a) Rain (b) Sunrise (c) Stars
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Cancel button: 52 px tall
    Start button: 52 px tall
    Save button: 56 px tall (a) Save (b) Back (c) Cancel (d) Start
14. 14.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) share your streak (b) custom alert sounds (c) water animations (d) see today’s total
15. 15.🔢 In a food-order flow, which comes FIRST? (a) track the order (b) add it to the cart (c) pick a dish (d) open the menu
16. 16.🗂️ What kind of app is a unit converter? (a) a health app (b) a game (c) a tool app (d) a learning app
17. 17.🔀 What does this sign-up rule show?
    let age = 17;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
18. 18.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [slider] Brightness
    [button] Save
    [button] Help
    [text box] Phone
    [text box] City
    [text box] Due date
    [button] Start
19. 19.👆 The user types Meera in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    }; (a) Hello! (b) Hello, Meera! (c) Hello, nameBox.text! (d) Meera
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(10) → expected 100
    Test 2: price(9) → expected 50
    Test 3: price(14) → expected 100 (a) Test 1 (b) Test 2 (c) Test 3
21. 21.Which of these requests asks for too much? (a) calling app → contacts (b) camera app → camera (c) torch → contacts (d) map app → location
22. 22.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ top bar ]
    [ list of items ]
    [ title text ]
    [ Add button ] (a) top bar (b) Add button (c) list of items (d) title text
23. 23.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Edit photo”
    2. tap Back
    3. open “Help page”
    4. tap Back
    5. open “Edit photo”
    How many times must you tap Back to reach the main screen of this tab?
24. 24.🔢 When you make an app, which comes FIRST? (a) build the app (b) release it (c) get an idea (d) plan the screens
25. 25.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Welcome, " + nameBox.text + "!";
    }; (a) Riya (b) Welcome, nameBox.text! (c) Welcome! (d) Welcome, Riya!
26. 26.📅 An app team plans for 4 days, builds for 12 days, tests for 1 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
27. 27.True or false: a blank grey screen solves no real problem. (a) False (b) True
28. 28.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 31; // start at 31
    line 2: score = score + 4; // take away 4
    line 3: score = score * 2; // double it
    line 4: score = score + 4; // add 4
    line 5: show(score); // show it
29. 29.True or false: a water reminder is the best fit for a grandparent with weak eyesight. (a) False (b) True
30. 30.🗒️ What is a must-have feature? (a) a nice extra (b) a colour theme (c) a sound effect (d) one the app cannot skip
31. 31.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 11, and 100 for everyone else.
    function price(age) {
      if (age <= 11) {
        return 50;
      }
      return 100;
    }
    Test 1: price(11) → expected 100
    Test 2: price(8) → expected 50
    Test 3: price(12) → expected 100 (a) Test 1 (b) Test 2 (c) Test 3
32. 32.True or false: an alarm clock is a health app. (a) True (b) False
33. 33.🔀 What does this battery rule show?
    let battery = 3;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery
34. 34.🎨 UI stands for user ___. (a) input (b) internet (c) idea (d) interface
35. 35.♿ A screen has 7 icon buttons. Only 6 of them have a text label for screen readers. How many still need a label?
36. 36.🔁 What number does this code show?
    let scores = [87, 85, 26];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
37. 37.💡 Does an app idea like a button with no action solve a real problem? (a) No (b) Yes
38. 38.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(650) → expected 0
    Test 2: delivery(300) → expected 40
    Test 3: delivery(550) → expected 0
39. 39.True or false: “strong colour contrast” helps everyone use the app. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) colour as the only clue (b) tiny tap areas (c) sudden loud sounds (d) labels on every icon

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