App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 804 · 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.🔢 In a sign-up flow, which comes FIRST? (a) tap “Sign up” (b) make a password (c) open the app (d) see the home screen
2. 2.📱 The word “app” is short for ___. (a) appetite (b) appointment (c) apparatus (d) application
3. 3.🐞 Each comment says what its line SHOULD do. Which line has the bug?
   line 1: let points = 34; // start at 34
   line 2: points = points + 2; // take away 2
   line 3: points = points + 4; // add 4
   line 4: points = points + 3; // add 3
   line 5: show(points); // show it (a) line 1 (b) line 2 (c) line 4 (d) line 3
4. 4.📱 Which one is installed on a phone: an app or a website? (a) a website (b) an app
5. 5.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) add a homework task (b) earn stickers (c) set a due date (d) see tasks by day
6. 6.Which of these fits saving in the cloud? (a) chat messages to friends (b) a draft you are typing (c) notes to read offline (d) the sound on/off setting
7. 7.🗒️ Version 1 of a homework planner must be ready in 13 days. How many days are left for extras after the must-haves?
   add a homework task: 3 days
   set a due date: 1 days
   see tasks by day: 5 days
8. 8.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(10, 2));
9. 9.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let score = 50; // start at 47
   line 2: score = score - 4; // take away 4
   line 3: score = score * 2; // double it
   line 4: show(score); // show it
10. 10.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [switch] Dark mode
    [slider] Volume
    [text box] Age
    [text box] Name
    [button] Help
    [text box] City
11. 11.🧪 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(11) → expected 100
    Test 2: price(16) → expected 100
    Test 3: price(10) → expected 50 (a) Test 1 (b) Test 3 (c) Test 2
12. 12.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 41; // start at 41
    line 2: lives = lives + 3; // take away 3
    line 3: lives = lives * 2; // double it
    line 4: show(lives); // show it (a) line 2 (b) line 3 (c) line 1
13. 13.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Size → Shop → Pens → Results
    Design B: Home → Address → Search → Confirm → Cart → Shop → Results
14. 14.🎯 Which app would help this user most: a teen learning to make snacks? (a) a big-text reader (b) a pocket-money tracker (c) a bus tracker (d) a recipe finder
15. 15.True or false: the user taps Play is a tap event. (a) True (b) False
16. 16.🧩 Which of these is a button on this screen?
    [title] Sign Up
    [button] Save
    [text box] City
    [button] Send (a) Save (b) City
17. 17.True or false: a draft you are typing fits saving in the cloud. (a) False (b) True
18. 18.🔀 What does this battery rule show?
    let battery = 80;
    if (battery < 20) {
      show("Low battery");
    } else {
      show("Battery OK");
    } (a) Low battery (b) Battery OK
19. 19.💾 Where should the app save notes to read offline: on the phone or in the cloud? (a) in the cloud (b) on the phone
20. 20.💾 What number does this code show?
    let score = 7;
    score = score - 4;
    score = score + 1;
    show(score);
21. 21.♿ Does this help everyone, or make the app harder to use: sudden loud sounds? (a) helps everyone (b) makes it harder
22. 22.🎨 UX stands for user ___. (a) extra (b) example (c) express (d) experience
23. 23.🔀 What does this PIN rule show?
    let pin = "214";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    } (a) PIN saved (b) Use 4 digits
24. 24.🔢 After an app is released, what comes right after “list what to fix”? (a) release an update (b) fix and improve (c) test it again (d) read user reviews
25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔐 Which permission does a weather-near-me app really need? (a) the camera (b) location (c) contacts (d) the microphone
27. 27.🔍 Which is the odd one out? (a) big touch targets (b) sudden loud sounds (c) fast-flashing lights (d) icons with no labels
28. 28.🔁 What number does this code show?
    let steps = [72, 55, 78, 69];
    let count = 0;
    for (let i = 0; i < steps.length; i++) {
      if (steps[i] >= 50) {
        count = count + 1;
      }
    }
    show(count);
29. 29.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) pale pink on white
30. 30.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) red on green (d) light grey on white
31. 31.🗒️ In MVP, the M stands for ___. (a) maximum (b) minimum (c) mobile (d) music
32. 32.True or false: a pocket-money tracker is the best fit for a grandparent with weak eyesight. (a) False (b) True
33. 33.👥 A school app has 65 students, 300 teachers and 115 parents as users. How many more parents than students are there?
34. 34.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Video”
    2. tap the Me tab
    3. open “Friend list”
    4. tap the Lessons tab
    Which screen are you on now? (a) Quiz (b) Friend list (c) Lessons (d) Video
35. 35.🧭 About how many tabs suit a tab bar best? (a) 10 to 12 (b) 3 to 5 (c) 1 (d) 20
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 40 px tall
    Done button: 56 px tall (a) Save (b) Next (c) Done
38. 38.♿ Does this help everyone, or make the app harder to use: text that can grow? (a) makes it harder (b) helps everyone
39. 39.🔢 In a sign-up flow, which comes first: “open the app” or “type name and email”? (a) open the app (b) type name and email
40. 40.🗒️ You are planning version 1 of a water reminder. Which feature is a MUST-HAVE? (a) water animations (b) set a reminder time (c) share your streak (d) custom alert sounds

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