App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 174 · 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.🧰 A museum app works out the entry fee. What number does this code show?
   function fee(age) {
     if (age < 5) {
       return 0;
     }
     return 40;
   }
   show(fee(6) + fee(12));
2. 2.🔍 Which is the odd one out? (a) a calculator (b) a water reminder (c) a unit converter (d) a torch
3. 3.💾 Which can hold many values in order? (a) a single number (b) a list (c) a switch (d) a button
4. 4.🔍 Which is the odd one out? (a) sorting the scores (b) a result on screen (c) a pop-up message (d) a buzz (vibration)
5. 5.🔁 list.length tells you ___. (a) how many items it has (b) the last item (c) the biggest item (d) the first item
6. 6.🧪 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(8) → expected Pass
   Test 2: result(7) → expected Try again
   Test 3: result(9) → expected Pass
7. 7.Which of these helps everyone use the app? (a) fast-flashing lights (b) colour as the only clue (c) icons with no labels (d) labels on every icon
8. 8.🔢 In a food-order flow, which comes first: “check the cart” or “pick a dish”? (a) check the cart (b) pick a dish
9. 9.🧭 Which part of navigation goes to the last screen? (a) a tab bar (b) the back button (c) a menu button
10. 10.📅 An app team plans for 2 days, builds for 5 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
11. 11.🔁 What number does this code show?
    let marks = [11, 3, 14, 9, 13];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
12. 12.Which of these is a feature? (a) “I forget my homework” (b) “Small text is hard” (c) “What should I cook?” (d) a reminder alarm
13. 13.True or false: “text that can grow” helps everyone use the app. (a) True (b) False
14. 14.🎨 Is this about UI or UX: the theme colours? (a) UI (b) UX
15. 15.🧩 Which of these is a button on this screen?
    [title] New Note
    [switch] Dark mode
    [button] Help
    [text box] Email
    [text box] Age
    [button] Done
    [button] Cancel (a) Done (b) Dark mode (c) Age (d) Email
16. 16.📅 An app team plans for 2 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?
17. 17.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) a result on screen (d) sorting the scores
18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.⚙️ What number does this app show?
    let bill = 108; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
20. 20.🔀 What number does this shop app show?
    let total = 610;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
21. 21.🔀 What does this sign-up rule show?
    let age = 14;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
22. 22.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [text box] Notes
    [button] Help
23. 23.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 35; // start at 33
    line 2: lives = lives - 1; // take away 1
    line 3: lives = lives - 5; // take away 5
    line 4: show(lives); // show it (a) line 2 (b) line 3 (c) line 1
24. 24.💾 What is a variable? (a) a picture (b) a named box for a value (c) a phone setting (d) a type of screen
25. 25.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 40; // start at 40
    line 2: points = points + 2; // double it
    line 3: points = points + 3; // add 3
    line 4: show(points); // show it
26. 26.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 25 px
    Caption: 22 px
    Label: 14 px
    Body text: 19 px
    Menu: 17 px (a) Caption (b) Body text (c) Label (d) Footer
27. 27.True or false: the search box changes is a timer event. (a) True (b) False
28. 28.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Video”
    2. tap Back
    3. open “Help page”
    4. open “Edit photo”
    5. tap Back
    How many times must you tap Back to reach the main screen of this tab?
29. 29.Which of these is true of a tab bar? (a) undoes one move (b) hides extra links (c) sits at the bottom (d) goes to the last screen
30. 30.♿ Does this help everyone, or make the app harder to use: strong colour contrast? (a) makes it harder (b) helps everyone
31. 31.🔢 In a sign-up flow, which comes first: “open the app” or “see the home screen”? (a) open the app (b) see the home screen
32. 32.True or false: a walking map needs your location. (a) False (b) True
33. 33.👥 A clinic app has 20 patients, 145 doctors and 205 nurses as users. How many more nurses than patients are there?
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
35. 35.🧪 How many of these test cases pass?
    🎟️ 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(12) → expected 50
    Test 3: price(15) → expected 100
36. 36.Which of these happens at the release stage? (a) pick the features (b) spot a problem to solve (c) share the download link (d) talk to possible users
37. 37.Which of these is true of a wireframe? (a) has no real colours (b) shows the real fonts (c) looks like the real app (d) uses the final pictures
38. 38.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let points = 51; // start at 50
    line 2: points = points * 2; // double it
    line 3: points = points + 2; // add 2
    line 4: show(points); // show it (a) line 2 (b) line 3 (c) line 1
39. 39.🖼️ In this wireframe (top to bottom), which part is at the very bottom?
    [ big picture ]
    [ top bar ]
    [ Add button ]
    [ title text ]
    [ Save button ]
    [ filter buttons ] (a) title text (b) filter buttons (c) Add button (d) Save button
40. 40.True or false: the log-in page is a screen. (a) False (b) True

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