App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 790 · 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 is a function? (a) a type of phone (b) a list of colours (c) a screen size (d) a named block of code
2. 2.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Search → Confirm → Item
   Design B: Home → Pens → Confirm
3. 3.📊 Survey: which problem bugs you most? Which problem should your app solve first?
   wasting pocket money: 13 votes
   forgetting birthdays: 7 votes
   no quiet study place: 22 votes (a) wasting pocket money (b) no quiet study place (c) forgetting birthdays
4. 4.True or false: you talk to possible users at the idea stage. (a) True (b) False
5. 5.🧩 Which of these is a button on this screen?
   [title] Edit Profile
   [button] Cancel
   [text box] Phone
   [slider] Brightness (a) Cancel (b) Phone (c) Brightness
6. 6.🎨 Fewer taps to finish a task usually means ___. (a) worse UX (b) more colours (c) better UX (d) a bigger app
7. 7.🚀 Which of these versions is the NEWEST?
   2.12.2, 1.27.6, 2.19.6, 2.17.2 (a) 2.17.2 (b) 2.12.2 (c) 1.27.6 (d) 2.19.6
8. 8.🔢 In a quiz-app flow, which comes first: “see the final score” or “read a question”? (a) see the final score (b) read a question
9. 9.Which of these is true of a final design? (a) shows where things go (b) has no real colours (c) has the real colours (d) uses plain grey boxes
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
11. 11.Which of these makes the app harder to use? (a) captions on videos (b) text that can grow (c) strong colour contrast (d) tiny tap areas
12. 12.🔁 What number does this code show?
    let marks = [1, 4, 13];
    let total = 0;
    for (let i = 0; i < marks.length; i++) {
      total = total + marks[i];
    }
    show(total);
13. 13.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Profile tab
    2. tap the Profile tab
    3. open “Score card”
    How many times must you tap Back to reach the main screen of this tab?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Back button: 40 px tall
    Help button: 40 px tall
    Done button: 32 px tall
15. 15.🧩 How many buttons does this app screen have?
    [title] New Note
    [button] Cancel
    [text box] City
    [text box] Name
    [button] Done
16. 16.🔢 In a sign-up flow, which comes LAST? (a) see the home screen (b) make a password (c) tap “Sign up” (d) enter the code sent
17. 17.True or false: a draft you are typing fits saving on the phone. (a) False (b) True
18. 18.🧪 Who else should try an app before release? (a) real users (b) the app icon (c) nobody (d) only the coder
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 54; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 4 (c) line 1 (d) line 3
20. 20.True or false: a final design is a quick sketch. (a) True (b) False
21. 21.🔢 In a food-order flow, what comes right after “pay for the order”? (a) check the cart (b) track the order (c) pick a dish (d) open the menu
22. 22.🔁 What number does this code show?
    let runs = [10, 5, 2];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
23. 23.🚀 Which of these versions is the NEWEST?
    0.22.9, 1.13.8, 1.7.4, 1.12.2 (a) 1.7.4 (b) 1.12.2 (c) 0.22.9 (d) 1.13.8
24. 24.💾 What does this code show? (Positions start at 0.)
    let friends = ["Meera", "Arjun", "Riya", "Kabir", "Aman"];
    show(friends[1]); (a) Kabir (b) Arjun (c) Meera (d) Riya
25. 25.💡 Does an app idea like a library due-date alert solve a real problem? (a) No (b) Yes
26. 26.💾 What number does this code show?
    let friends = ["Arjun", "Meera"];
    friends.push("Riya");
    show(friends.length);
27. 27.🧪 What is the actual result of a test? (a) the test’s number (b) the app’s name (c) what we hope for (d) what the app really does
28. 28.Which of these requests is fair? (a) timer → your photos (b) calculator → location (c) voice notes → microphone (d) torch → contacts
29. 29.🧩 What do we call one full page of an app? (a) a variable (b) a screen (c) a cable (d) a battery
30. 30.🧪 One test case fails. Which one?
    🚚 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(250) → expected 40
    Test 2: delivery(400) → expected 0
    Test 3: delivery(650) → expected 0 (a) Test 2 (b) Test 3 (c) Test 1
31. 31.True or false: sorting the scores is processing. (a) False (b) True
32. 32.🗒️ Why keep version 1 small? (a) to use up storage (b) to look bigger (c) to confuse users (d) to learn from users soon
33. 33.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 44; // start at 44
    line 2: coins = coins + 8; // add 6
    line 3: coins = coins - 4; // take away 4
    line 4: show(coins); // show it
34. 34.🔐 Is this permission request fair or too much: camera app → camera? (a) fair (b) too much
35. 35.🔁 What number does this code show?
    let steps = [6, 16, 14];
    let total = 0;
    for (let i = 0; i < steps.length; i++) {
      total = total + steps[i];
    }
    show(total);
36. 36.📱 Which one updates from the store: an app or a website? (a) an app (b) a website
37. 37.📱 Which one opens in a web browser: an app or a website? (a) a website (b) an app
38. 38.🧰 In function tip(bill), what is bill? (a) a loop (b) a parameter (c) a screen (d) an event
39. 39.🎨 A beautiful app that confuses everyone has ___. (a) no UI at all (b) good UX but poor UI (c) good UI but poor UX (d) perfect UX
40. 40.🧪 A test fails when ___. (a) the app is new (b) the font is big (c) both are the same (d) actual is not expected

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