App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 209 · 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 of these is true of an app? (a) opens in a web browser (b) comes from an app store (c) has a web address (d) opens from a link
2. 2.🔐 Which permission does a homework photo scanner really need? (a) contacts (b) location (c) the microphone (d) the camera
3. 3.🧪 Who else should try an app before release? (a) nobody (b) only the coder (c) the app icon (d) real users
4. 4.🧰 What does this code show?
   function greet(name) {
     return "Welcome, " + name + "!";
   }
   show(greet("Zoya")); (a) greet (b) Welcome, name! (c) Welcome, Zoya! (d) Zoya
5. 5.🛠️ At which stage do you pick the features? (a) the plan stage (b) the release stage (c) the build stage (d) the idea stage
6. 6.🚀 Which of these versions is the NEWEST?
   3.23.8, 4.2.1, 4.14.8, 4.3.7 (a) 4.2.1 (b) 4.14.8 (c) 3.23.8 (d) 4.3.7
7. 7.👥 A cricket club app has 115 players, 155 coaches and 95 fans as users. How many users does it have in all?
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 25; // typed by the user
   line 2: let qty = 3; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 1 (b) line 3 (c) line 4 (d) line 2
9. 9.💾 Which can hold many values in order? (a) a button (b) a switch (c) a list (d) a single number
10. 10.👥 A library app has 165 readers, 80 librarians and 50 volunteers as users. Which user group is the biggest? (a) volunteers (b) readers (c) librarians
11. 11.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) see today’s total (b) water animations (c) custom alert sounds (d) share your streak
12. 12.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 9, and 100 for everyone else.
    function price(age) {
      if (age <= 9) {
        return 50;
      }
      return 100;
    }
    Test 1: price(9) → expected 100
    Test 2: price(12) → expected 100
    Test 3: price(5) → expected 50
13. 13.💾 Saving data in the cloud lets you ___. (a) shrink the app (b) never need a password (c) use it on any device (d) skip the internet
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 4; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
15. 15.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pens → Results → Address
    Design B: Home → Menu → Results (a) Design A (b) Design B
16. 16.🚀 In version 2.5.1, which number is the major version? (a) 2 (b) 5 (c) 1 (d) 251
17. 17.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Results → Pens → Confirm
    Design B: Home → Item → Shop → Cart → Pens → Address (a) Design B (b) Design A
18. 18.💾 What number does this code show?
    let notes = ["Sports", "Science", "Maths", "Hindi"];
    notes.push("Music");
    show(notes.length);
19. 19.True or false: a cricket run chase is a learning app. (a) False (b) True
20. 20.🔀 What does this battery rule show?
    let battery = 28;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
21. 21.🔢 When you make an app, which comes FIRST? (a) test the app (b) plan the screens (c) get an idea (d) release it
22. 22.👆 The user types Meera in nameBox and taps the button 1 time. What does the label show?
    button.onTap = function () {
      label.text = "Hello, " + nameBox.text + "!";
    }; (a) Hello! (b) Hello, Meera! (c) Hello, nameBox.text! (d) Meera
23. 23.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) savings stickers (b) export to a file (c) show the balance (d) pie-chart colours
24. 24.💡 Which app idea solves this problem: bottles go missing at school? (a) a lost-and-found board (b) a homework planner (c) a medicine reminder (d) a bill splitter
25. 25.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 46; // start at 44
    line 2: coins = coins - 3; // take away 3
    line 3: coins = coins * 2; // double it
    line 4: coins = coins + 4; // add 4
    line 5: show(coins); // show it (a) line 2 (b) line 1 (c) line 4 (d) line 3
26. 26.Which of these fits saving on the phone? (a) a class leaderboard (b) a shared to-do list (c) a draft you are typing (d) chat messages to friends
27. 27.Which of these is true of the back button? (a) shows 3 to 5 icons (b) sits at the bottom (c) goes to the last screen (d) switches main sections
28. 28.🧭 Which part of navigation opens a list of pages? (a) the back button (b) a tab bar (c) a menu button
29. 29.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) see tasks by day (b) pick a theme colour (c) earn stickers (d) share tasks to friends
30. 30.🗒️ What is a must-have feature? (a) a colour theme (b) a sound effect (c) a nice extra (d) one the app cannot skip
31. 31.True or false: notes to read offline fits saving in the cloud. (a) True (b) False
32. 32.True or false: a wireframe has no real colours. (a) False (b) True
33. 33.👆 The user taps the button 1 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) OFF (b) ON
34. 34.🔢 In a sign-up flow, what comes right after “open the app”? (a) make a password (b) type name and email (c) enter the code sent (d) tap “Sign up”
35. 35.📱 Where do people usually download phone apps from? (a) an app store (b) a charger (c) a printer (d) a web server
36. 36.🧩 How many buttons does this app screen have?
    [title] Settings
    [text box] Name
    [slider] Text size
    [text box] Phone
    [button] Done
    [button] Send
37. 37.🗒️ Why keep version 1 small? (a) to look bigger (b) to use up storage (c) to learn from users soon (d) to confuse users
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
39. 39.True or false: a word battle is a learning app. (a) True (b) False
40. 40.👥 A school app has 105 students, 265 teachers and 85 parents as users. How many users does it have in all?

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