App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 667 · 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.💡 Which app idea solves this problem: bottles go missing at school? (a) a lost-and-found board (b) a medicine reminder (c) a homework planner (d) a bill splitter
2. 2.🔢 In a sign-up flow, which comes LAST? (a) open the app (b) make a password (c) tap “Sign up” (d) see the home screen
3. 3.🗒️ Version 1 of a pocket-money tracker must be ready in 13 days. How many days are left for extras after the must-haves?
   add money received: 4 days
   add money spent: 3 days
   show the balance: 2 days
4. 4.True or false: chat messages to friends fits saving on the phone. (a) True (b) False
5. 5.Which of these fits saving on the phone? (a) a draft you are typing (b) a class leaderboard (c) chat messages to friends (d) photos on two devices
6. 6.🔢 In a photo-post flow, which comes LAST? (a) open the camera screen (b) add a filter (c) write a caption (d) post the photo
7. 7.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(75, 5));
8. 8.Which of these requests asks for too much? (a) map app → location (b) voice notes → microphone (c) calling app → contacts (d) torch → contacts
9. 9.🧑 Who is an app really made for? (a) its icon (b) its coder only (c) its charger (d) its users
10. 10.🚀 A privacy policy tells users ___. (a) the screen size (b) the app’s colours (c) the app’s price (d) what data is collected
11. 11.Which of these is true of a website? (a) updates from the store (b) has a home-screen icon (c) is installed on a phone (d) has a web address
12. 12.👆 What kind of event is this: the user presses Save? (a) a tap event (b) a timer event (c) a text event (d) a load event
13. 13.👆 The user taps the button 7 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) ON (b) OFF
14. 14.🎨 UI stands for user ___. (a) idea (b) interface (c) input (d) internet
15. 15.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
16. 16.🧪 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(12) → expected 100
    Test 2: price(10) → expected 50
    Test 3: price(11) → expected 100 (a) Test 3 (b) Test 1 (c) Test 2
17. 17.True or false: a weather-near-me app needs your contacts. (a) False (b) True
18. 18.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) share tasks to friends (b) pick a theme colour (c) earn stickers (d) see tasks by day
19. 19.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let stars = 33; // start at 33
    line 2: stars = stars - 5; // take away 3
    line 3: stars = stars - 3; // take away 3
    line 4: stars = stars - 2; // take away 2
    line 5: show(stars); // show it
20. 20.♿ Does this help everyone, or make the app harder to use: colour as the only clue? (a) helps everyone (b) makes it harder
21. 21.🚀 Your app is at version 4.7.4. The next release fixes a small bug. What is its version number? (a) 4.8.0 (b) 4.8.4 (c) 4.7.5 (d) 5.0.0
22. 22.🔢 After an app is released, which comes FIRST? (a) read user reviews (b) fix and improve (c) release an update (d) list what to fix
23. 23.🧪 What is the ACTUAL result of Test 2?
    🚚 Rule: delivery is free (0) when the order is 400 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 400) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(600) → expected 0
    Test 2: delivery(400) → expected 0
    Test 3: delivery(350) → expected 40
24. 24.True or false: “captions on videos” helps everyone use the app. (a) True (b) False
25. 25.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Score card”
    2. tap the Home tab
    3. open “Match report”
    4. tap the Home tab
    5. tap the Profile tab
    How many times must you tap Back to reach the main screen of this tab?
26. 26.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Order Snacks
    [text box] Email
    [text box] Subject
    [text box] Phone
    [button] Done
27. 27.🗂️ What kind of app is a word battle? (a) a learning app (b) a health app (c) a tool app (d) a game
28. 28.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
29. 29.🧩 In an app, what is the settings page? (a) a screen (b) a button (c) an input (d) data
30. 30.🧭 Why should every screen show where you are? (a) so users do not get lost (b) to look busy (c) to hide the menu (d) to use more battery
31. 31.🔍 Which is the odd one out? (a) colour as the only clue (b) tiny tap areas (c) fast-flashing lights (d) captions on videos
32. 32.Which of these is true of a final design? (a) has no real colours (b) is a quick sketch (c) looks like the real app (d) uses plain grey boxes
33. 33.🧪 What is the ACTUAL result of Test 1?
    🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 800) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(900) → expected 0
    Test 2: delivery(750) → expected 40
    Test 3: delivery(800) → expected 0
34. 34.Which of these fits saving in the cloud? (a) your last game level (b) a draft you are typing (c) chat messages to friends (d) the sound on/off setting
35. 35.Which of these fits saving in the cloud? (a) photos on two devices (b) the sound on/off setting (c) notes to read offline (d) a draft you are typing
36. 36.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let points = 36; // start at 34
    line 2: points = points - 2; // take away 2
    line 3: points = points + 5; // add 5
    line 4: show(points); // show it
37. 37.🔁 What number does this code show?
    let scores = [6, 7, 2, 7];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
38. 38.👆 The user types Riya in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    }; (a) Hello, nameBox.text! (b) Riya (c) Hello! (d) Hello, Riya!
39. 39.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Search → Pay → Offers → Menu
    Design B: Home → Item → Offers
40. 40.🔀 What does this battery rule show?
    let battery = 15;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Battery OK (b) Low battery

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