App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 941 · 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 does this battery rule show?
   let battery = 13;
   if (battery < 20) {
     show("Low battery");
   } else {
     show("Battery OK");
   } (a) Battery OK (b) Low battery
2. 2.✏️ A box with a cross in a wireframe usually means ___. (a) delete this (b) a closed app (c) an error (d) a picture goes here
3. 3.🛠️ At which stage do you talk to possible users? (a) the release stage (b) the plan stage (c) the idea stage (d) the build stage
4. 4.🔍 Which is the odd one out? (a) put it on an app store (b) sketch the screens (c) share the download link (d) write the store text
5. 5.🧩 In an app, what is a date picker? (a) a button (b) data (c) an input (d) a screen
6. 6.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) helps everyone (b) makes it harder
7. 7.🔁 What number does this code show?
   let steps = [14, 14, 16];
   let total = 0;
   for (let i = 0; i < steps.length; i++) {
     total = total + steps[i];
   }
   show(total);
8. 8.🎨 Is this about UI or UX: how easy sign-up is? (a) UI (b) UX
9. 9.Which of these fits saving on the phone? (a) chat messages to friends (b) photos on two devices (c) a shared to-do list (d) the sound on/off setting
10. 10.🐞 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 30
    line 2: score = score * 2; // double it
    line 3: score = score * 2; // double it
    line 4: score = score * 2; // double it
    line 5: show(score); // show it
11. 11.🔢 In a photo-post flow, which comes first: “open the camera screen” or “add a filter”? (a) add a filter (b) open the camera screen
12. 12.Which of these app ideas solves no real problem? (a) a button with no action (b) a free study-room finder (c) a library due-date alert (d) a lost-and-found board
13. 13.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 240; // typed by the user
    line 2: let off = 40; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 4 (b) line 2 (c) line 3 (d) line 1
15. 15.🧰 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(2) + fee(11));
16. 16.📅 An app team plans for 4 days, builds for 9 days, tests for 2 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
17. 17.👆 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;
    };
18. 18.🔢 In a sign-up flow, what comes right after “open the app”? (a) tap “Sign up” (b) enter the code sent (c) see the home screen (d) make a password
19. 19.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Cart → Menu → Results → Offers → Size → Address
    Design B: Home → Shop → Offers → Menu
20. 20.Which of these fits saving on the phone? (a) chat messages to friends (b) your last game level (c) photos on two devices (d) a class leaderboard
21. 21.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
22. 22.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
    Design A: Home → Search → Shop → Results → Item → Size → Menu
    Design B: Home → Confirm → Pay
23. 23.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “missing the bus”?
    missing the bus: 4 votes
    wasting pocket money: 12 votes
    no quiet study place: 8 votes
24. 24.True or false: a draft you are typing fits saving on the phone. (a) True (b) False
25. 25.🎯 Is this a user need or a feature: a search bar? (a) a user need (b) a feature
26. 26.🔀 What does this PIN rule show?
    let pin = "2784";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) PIN saved (b) Use 4 digits
27. 27.🧪 How many of these test cases pass?
    📝 Rule: a quiz is passed with 5 or more right answers.
    function result(right) {
      if (right > 5) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(6) → expected Pass
    Test 2: result(4) → expected Try again
    Test 3: result(9) → expected Pass
28. 28.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Search tab
    2. open “Badges”
    3. tap the Home tab
    Which screen are you on now? (a) Search (b) Profile (c) Badges (d) Home
29. 29.True or false: a big, easy tap area is poor button design. (a) False (b) True
30. 30.🗒️ You are planning version 1 of a water reminder. Which feature can WAIT for a later version? (a) set a reminder time (b) see today’s total (c) share your streak (d) log a glass of water
31. 31.🔐 Which permission does a voice recorder really need? (a) the camera (b) contacts (c) the microphone (d) location
32. 32.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) set a due date (b) see tasks by day (c) add a homework task (d) share tasks to friends
33. 33.🎯 Is this a user need or a feature: “I forget my homework”? (a) a user need (b) a feature
34. 34.Which of these helps everyone use the app? (a) fast-flashing lights (b) strong colour contrast (c) colour as the only clue (d) sudden loud sounds
35. 35.💡 Does an app idea like a medicine reminder solve a real problem? (a) No (b) Yes
36. 36.⚙️ What number does this app show?
    let km = 13; // typed by the user
    let metres = km * 1000;
    show(metres);
37. 37.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 31; // start at 31
    line 2: coins = coins - 2; // add 2
    line 3: coins = coins + 2; // add 2
    line 4: show(coins); // show it
38. 38.🔢 In a food-order flow, which comes LAST? (a) open the menu (b) pay for the order (c) track the order (d) add it to the cart
39. 39.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(7));

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