App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 586 · 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.True or false: grey text on grey is good button design. (a) True (b) False
2. 2.💾 In most code, the first item of a list is at position ___. (a) 2 (b) 0 (c) 1 (d) 10
3. 3.🔍 Which is the odd one out? (a) the icon shapes (b) how users feel after (c) how many taps it takes (d) whether users get lost
4. 4.💾 pop() takes off the last item. What does this code show?
   let friends = ["Arjun", "Aman", "Meera", "Kabir"];
   friends.pop();
   show(friends[friends.length - 1]); (a) Arjun (b) Kabir (c) Aman (d) Meera
5. 5.🚀 Which of these versions is the NEWEST?
   3.18.4, 3.5.1, 2.27.3, 3.12.3 (a) 2.27.3 (b) 3.18.4 (c) 3.12.3 (d) 3.5.1
6. 6.🗒️ You are planning version 1 of a quiz app. Which feature can WAIT for a later version? (a) show a question (b) background music (c) check the answer (d) show the score
7. 7.Which of these requests is fair? (a) torch → contacts (b) timer → your photos (c) map app → location (d) quiz app → microphone
8. 8.🗒️ A to-do app with no “add a task” feature is ___. (a) ready to release (b) missing a must-have (c) well planned (d) a nice extra
9. 9.🔁 What is the LAST line this code shows?
   let names = ["Riya", "Arjun", "Aman", "Kabir", "Meera"];
   for (let i = 0; i < names.length; i++) {
     show("Hi, " + names[i]);
   } (a) Hi, Aman (b) Hi, Meera (c) Hi, Arjun (d) Hi, Riya
10. 10.🔢 When you make an app, what comes right after “build the app”? (a) plan the screens (b) test the app (c) release it (d) get an idea
11. 11.🔁 What number does this code show?
    let steps = [1, 3, 5, 11];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
12. 12.♿ Does this help everyone, or make the app harder to use: fast-flashing lights? (a) makes it harder (b) helps everyone
13. 13.🔁 What is the LAST line this code shows?
    let names = ["Aman", "Meera", "Zoya", "Riya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    } (a) Hi, Zoya (b) Hi, Meera (c) Hi, Riya (d) Hi, Aman
14. 14.🗒️ 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
15. 15.💾 What does this code show? (Positions start at 0.)
    let notes = ["Art", "Science", "Sports"];
    show(notes[2]); (a) Art (b) Sports (c) Science
16. 16.🧰 What does this code show?
    function greet(name) {
      return "Hi, " + name + "!";
    }
    show(greet("Riya")); (a) Hi, name! (b) Riya (c) greet (d) Hi, Riya!
17. 17.🧪 How many of these test cases pass?
    🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
    function price(age) {
      if (age < 12) {
        return 50;
      }
      return 100;
    }
    Test 1: price(16) → expected 100
    Test 2: price(12) → expected 100
    Test 3: price(8) → expected 50
18. 18.🗒️ You are planning version 1 of a pocket-money tracker. Which feature can WAIT for a later version? (a) add money received (b) show the balance (c) add money spent (d) savings stickers
19. 19.🧩 Which part lets the user give the app information? (a) a title (b) an input (c) an icon (d) a logo
20. 20.🔍 Which is the odd one out? (a) a flashcard trainer (b) a times-table quiz (c) a sleep tracker (d) a spelling coach
21. 21.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Menu → Search
    Design B: Home → Offers → Menu → Search → Shop (a) Design A (b) Design B
22. 22.🔀 In a good flow, each screen should lead to ___. (a) a random page (b) the same screen (c) a clear next step (d) a dead end
23. 23.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) water animations (b) share your streak (c) custom alert sounds (d) set a reminder time
24. 24.True or false: photos on two devices fits saving in the cloud. (a) False (b) True
25. 25.🔢 When you make an app, what comes right after “get an idea”? (a) release it (b) test the app (c) build the app (d) plan the screens
26. 26.Which of these is true of a wireframe? (a) looks like the real app (b) shows where things go (c) has the real colours (d) shows the real fonts
27. 27.✏️ Why draw a wireframe before coding? (a) it runs the app (b) changes are quick (c) it adds colours (d) it saves data
28. 28.🔐 Is this permission request fair or too much: torch → contacts? (a) fair (b) too much
29. 29.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 19 votes
    forgetting birthdays: 14 votes
    forgetting homework: 13 votes
30. 30.🧪 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(18) → expected 100
    Test 2: price(20) → expected 100
    Test 3: price(12) → expected 50
31. 31.🎯 An app for “everyone” with no clear user usually ___. (a) helps nobody well (b) needs no testing (c) is easy to build (d) wins every prize
32. 32.🔀 What does this sign-up rule show?
    let age = 15;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Welcome! (b) Ask a parent
33. 33.🔢 In a quiz-app flow, which comes first: “read a question” or “tap “Start quiz””? (a) read a question (b) tap “Start quiz”
34. 34.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Settings tab
    2. open “Edit photo”
    3. tap Back
    4. tap the Settings tab
    5. open “Help page”
    Which screen are you on now? (a) Edit photo (b) Chat (c) Help page (d) Feed
35. 35.📴 Which of these can often still work with no internet? (a) a video call (b) an installed app (c) a new website (d) an online search
36. 36.🎯 Is this a user need or a feature: “I keep missing the bus”? (a) a user need (b) a feature
37. 37.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 36; // start at 36
    line 2: score = score + 2; // double it
    line 3: score = score + 5; // add 5
    line 4: score = score * 2; // double it
    line 5: show(score); // show it (a) line 1 (b) line 3 (c) line 4 (d) line 2
38. 38.True or false: notes to read offline fits saving on the phone. (a) True (b) False
39. 39.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) pie-chart colours (b) savings stickers (c) export to a file (d) add money spent
40. 40.🧪 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(700) → expected 0
    Test 2: delivery(650) → expected 0
    Test 3: delivery(250) → expected 40

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