App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 261 · 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.🔁 What number does this code show?
   let runs = [12, 20, 19];
   let total = 0;
   for (let i = 0; i < runs.length; i++) {
     total = total + runs[i];
   }
   show(total);
2. 2.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Match report”
   2. tap Back
   3. open “Help page”
   Which screen are you on now? (a) Search (b) Home (c) Match report (d) Help page
3. 3.Which of these is data? (a) a slider for volume (b) the log-in page (c) your friends list (d) the home page of an app
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Send button: 44 px tall
   Help button: 56 px tall
   Back button: 48 px tall (a) Next (b) Help (c) Send (d) Back
6. 6.👆 The user taps the button 5 times. What number does the label show now?
   let stars = 10;
   button.onTap = function () {
     stars = stars + 1;
     label.text = stars;
   };
7. 7.🚀 Which version is newer: 4.4.2 or 4.13.2? (a) 4.13.2 (b) 4.4.2
8. 8.True or false: a free study-room finder solves a real problem. (a) False (b) True
9. 9.🔁 What number does this code show?
   let marks = [1, 6, 6, 2, 2];
   let total = 0;
   for (let i = 0; i < marks.length; i++) {
     total = total + marks[i];
   }
   show(total);
10. 10.🗒️ Version 1 of a quiz app must be ready in 15 days. How many days are left for extras after the must-haves?
    show a question: 2 days
    check the answer: 4 days
    show the score: 3 days
11. 11.🧰 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(8) + fee(4));
12. 12.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Body text: 18 px
    Footer: 23 px
    Menu: 11 px (a) Footer (b) Menu (c) Body text
13. 13.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) pick a theme colour (b) set a due date (c) share tasks to friends (d) earn stickers
14. 14.🔀 What does this sign-up rule show?
    let age = 8;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
15. 15.🧰 What does this code show?
    function greet(name) {
      return "Well done, " + name + "!";
    }
    show(greet("Aman")); (a) Aman (b) Well done, Aman! (c) greet (d) Well done, name!
16. 16.👆 The user taps the button 3 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
17. 17.🔁 In for (let i = 0; i < 3; i++), which values does i take? (a) 3 (b) 0, 1, 2, 3 (c) 0, 1, 2 (d) 1, 2, 3
18. 18.🎨 Is this about UI or UX: the icon shapes? (a) UX (b) UI
19. 19.💡 A good app idea starts with ___. (a) many colours (b) a cool logo (c) a problem to solve (d) a long name
20. 20.True or false: the button colours is about UI (the look). (a) True (b) False
21. 21.👆 The user taps the button 7 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
22. 22.🗒️ Version 1 of a pocket-money tracker must be ready in 10 days. How many days are left for extras after the must-haves?
    add money received: 4 days
    add money spent: 1 days
    show the balance: 2 days
23. 23.🔢 In a quiz-app flow, which comes FIRST? (a) read a question (b) see if it is right (c) see the final score (d) tap “Start quiz”
24. 24.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Match report”
    2. tap Back
    3. tap the Search tab
    4. open “Match report”
    How many times must you tap Back to reach the main screen of this tab?
25. 25.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Help page”
    2. tap Back
    3. tap the Settings tab
    4. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
26. 26.🔢 In a food-order flow, which comes first: “add it to the cart” or “pick a dish”? (a) add it to the cart (b) pick a dish
27. 27.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(50, 2));
28. 28.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(10, 3));
29. 29.True or false: a water reminder is the best fit for a child saving up for a cycle. (a) False (b) True
30. 30.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Kabir", "Meera", "Zoya", "Aman"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Riya (b) Hi, Meera (c) Hi, Kabir (d) Hi, Aman
31. 31.🛠️ At which stage do you sketch the screens? (a) the build stage (b) the test stage (c) the idea stage (d) the plan stage
32. 32.🔀 When does the else part run? (a) when the test is true (b) never (c) always (d) when the test is false
33. 33.🔀 What is a user flow? (a) a charging cable (b) a colour theme (c) a type of font (d) the path through screens
34. 34.🧪 What is the actual result of a test? (a) what the app really does (b) what we hope for (c) the test’s number (d) the app’s name
35. 35.🗒️ The first small, working version of an app is often called an ___. (a) URL (b) FAQ (c) CPU (d) MVP
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 52 px tall
    Next button: 36 px tall
    Save button: 56 px tall (a) Save (b) Cancel (c) Next (d) Send
37. 37.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Offers → Address → Search → Menu
    Design B: Home → Pay → Item
38. 38.True or false: a final design shows the real fonts. (a) False (b) True
39. 39.Which of these is true of a menu button? (a) opens a list of pages (b) goes to the last screen (c) undoes one move (d) sits at the bottom
40. 40.♿ A screen has 10 icon buttons. Only 7 of them have a text label for screen readers. How many still need a label?

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