App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 96 · 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.🧪 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(9) → expected 50
   Test 2: price(19) → expected 100
   Test 3: price(22) → expected 100
2. 2.🔀 What does this PIN rule show?
   let pin = "8237";
   if (pin.length === 4) {
     show("PIN saved");
   } else {
     show("Use 4 digits");
   } (a) Use 4 digits (b) PIN saved
3. 3.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) savings stickers (b) add money spent (c) show the balance (d) add money received
4. 4.🔢 When you make an app, which comes FIRST? (a) build the app (b) plan the screens (c) get an idea (d) release it
5. 5.🎨 Who should you test the UX with? (a) real users (b) the app icon (c) only yourself (d) nobody
6. 6.🧪 One test case fails. Which one?
   🎟️ Rule: a ticket costs 50 for children under 8, and 100 for everyone else.
   function price(age) {
     if (age <= 8) {
       return 50;
     }
     return 100;
   }
   Test 1: price(6) → expected 50
   Test 2: price(10) → expected 100
   Test 3: price(8) → expected 100 (a) Test 3 (b) Test 2 (c) Test 1
7. 7.True or false: a wireframe shows where things go. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) the button colours (b) the icon shapes (c) how fast a task is done (d) the font size
9. 9.♿ A screen has 6 icon buttons. Only 4 of them have a text label for screen readers. How many still need a label?
10. 10.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) water animations (b) log a glass of water (c) custom alert sounds (d) share your streak
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Done button: 64 px tall
    Next button: 40 px tall
    Start button: 56 px tall (a) Done (b) Start (c) Next (d) Help
12. 12.True or false: a website opens from a link. (a) True (b) False
13. 13.True or false: the settings page is a button. (a) False (b) True
14. 14.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔢 In a food-order flow, what comes right after “add it to the cart”? (a) open the menu (b) check the cart (c) track the order (d) pick a dish
16. 16.🖼️ In this wireframe (top to bottom), what is right above the top bar?
    [ Add button ]
    [ title text ]
    [ search box ]
    [ tab bar ]
    [ top bar ]
    [ big picture ] (a) tab bar (b) search box (c) big picture (d) Add button
17. 17.🚀 Which of these versions is the OLDEST?
    4.15.3, 3.21.2, 4.5.7, 4.7.4 (a) 4.15.3 (b) 4.5.7 (c) 4.7.4 (d) 3.21.2
18. 18.✏️ Is this true of a wireframe or of a final design: uses plain grey boxes? (a) a final design (b) a wireframe
19. 19.Which of these is true of a final design? (a) uses plain grey boxes (b) shows where things go (c) is a quick sketch (d) shows the real fonts
20. 20.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(25));
21. 21.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) confetti effects (b) background music (c) check the answer (d) an avatar shop
22. 22.🚀 Which of these versions is the OLDEST?
    1.6.5, 1.11.5, 1.4.3, 0.22.5 (a) 1.11.5 (b) 0.22.5 (c) 1.4.3 (d) 1.6.5
23. 23.Which of these is an input? (a) a box to type a name (b) your high score (c) the game-over page (d) tap to Save
24. 24.🗒️ Version 1 of a pocket-money tracker must be ready in 14 days. How many days are left for extras after the must-haves?
    add money received: 4 days
    add money spent: 2 days
    show the balance: 3 days
25. 25.🎨 Is this about UI or UX: the font size? (a) UX (b) UI
26. 26.👥 A school app has 60 students, 205 teachers and 120 parents as users. How many users does it have in all?
27. 27.🖼️ In this wireframe (top to bottom), what is right above the Add button?
    [ title text ]
    [ filter buttons ]
    [ Save button ]
    [ Add button ]
    [ big picture ]
    [ list of items ] (a) big picture (b) title text (c) list of items (d) Save button
28. 28.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 41; // start at 41
    line 2: points = points * 2; // double it
    line 3: points = points + 9; // add 6
    line 4: show(points); // show it
29. 29.True or false: a big, easy tap area is poor button design. (a) False (b) True
30. 30.📊 Survey: which problem bugs you most? How many more votes did “losing water bottles” get than “no quiet study place”?
    no quiet study place: 5 votes
    losing water bottles: 7 votes
    forgetting birthdays: 19 votes
31. 31.🐞 What is a good first step when an app gives a wrong result? (a) delete the app (b) buy a new phone (c) add more colours (d) find where it goes wrong
32. 32.✏️ Do wireframes usually show the final colours? (a) Yes (b) No
33. 33.🔍 Which is the odd one out? (a) list what users need (b) talk to possible users (c) spot a problem to solve (d) try every button
34. 34.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) home screen (c) dead end (d) tab bar
35. 35.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Address → Size → Menu → Shop → Confirm → Pens
    Design B: Home → Size → Pay → Search → Cart (a) Design B (b) Design A
36. 36.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Menu → Pens
    Design B: Home → Confirm → Results → Item
37. 37.🔍 Which is the odd one out? (a) an alarm clock (b) a cricket run chase (c) a word battle (d) a puzzle with levels
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Save button: 52 px tall
    Cancel button: 48 px tall (a) Send (b) Save (c) Cancel
39. 39.True or false: photos on two devices fits saving on the phone. (a) False (b) True
40. 40.Which of these fits saving in the cloud? (a) your last game level (b) notes to read offline (c) the sound on/off setting (d) chat messages to friends

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