App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 234 · 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.💡 After a survey, which need should version 1 solve? (a) the rarest need (b) the newest trend (c) the most common need (d) a random need
2. 2.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) set a due date (b) see tasks by day (c) add a homework task (d) share tasks to friends
3. 3.✏️ What is the easiest way to draw a first wireframe? (a) a phone case (b) a 3D printer (c) pencil and paper (d) a microphone
4. 4.💾 What number does this code show?
   let friends = ["Arjun", "Kabir", "Meera"];
   friends.push("Aman");
   friends.push("Riya");
   show(friends.length);
5. 5.🐞 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 + 3; // add 3
   line 3: score = score + 6; // add 6
   line 4: show(score); // show it
6. 6.🗒️ You are planning version 1 of a homework planner. Which feature can WAIT for a later version? (a) pick a theme colour (b) see tasks by day (c) set a due date (d) add a homework task
7. 7.🔁 What number does this code show?
   let steps = [20, 12, 10];
   let best = 0;
   for (let i = 0; i < steps.length; i++) {
     if (steps[i] > best) {
       best = steps[i];
     }
   }
   show(best);
8. 8.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
   Design A: Home → Pay → Item
   Design B: Home → Pens → Size → Pay → Item → Search → Results
9. 9.Which of these is true of a tab bar? (a) opens a list of pages (b) undoes one move (c) goes to the last screen (d) switches main sections
10. 10.Which of these happens at the idea stage? (a) write the store text (b) draw the user flow (c) spot a problem to solve (d) sketch the screens
11. 11.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 31; // start at 31
    line 2: coins = coins - 2; // add 2
    line 3: coins = coins + 6; // add 6
    line 4: show(coins); // show it
12. 12.🎨 Who should you test the UX with? (a) the app icon (b) only yourself (c) real users (d) nobody
13. 13.🔀 What does >= mean? (a) smaller or equal (b) not equal (c) greater than or equal (d) less than
14. 14.Which of these is true of the back button? (a) hides extra links (b) undoes one move (c) shows 3 to 5 icons (d) opens a list of pages
15. 15.♿ Does this help everyone, or make the app harder to use: tiny tap areas? (a) helps everyone (b) makes it harder
16. 16.🚀 Which version is newer: 4.8.7 or 4.8.15? (a) 4.8.15 (b) 4.8.7
17. 17.🧪 How many of these test cases pass?
    🎟️ 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(15) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(14) → expected 100
18. 18.🔀 Why plan the user flow before building? (a) to add more taps (b) to skip testing (c) so each step is clear (d) to hide the buttons
19. 19.🗒️ 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: 1 days
    add money spent: 4 days
    show the balance: 4 days
20. 20.👥 A school app has 95 students, 175 teachers and 115 parents as users. How many users does it have in all?
21. 21.True or false: an app has a web address. (a) False (b) True
22. 22.📊 Survey: which problem bugs you most? How many more votes did “forgetting homework” get than “missing the bus”?
    forgetting homework: 24 votes
    no quiet study place: 21 votes
    missing the bus: 4 votes
23. 23.🎨 Is this about UI or UX: whether users get lost? (a) UI (b) UX
24. 24.🎨 UI stands for user ___. (a) interface (b) idea (c) input (d) internet
25. 25.Which of these makes the app harder to use? (a) big touch targets (b) text that can grow (c) fast-flashing lights (d) strong colour contrast
26. 26.🔢 In a food-order flow, what comes right after “add it to the cart”? (a) pay for the order (b) pick a dish (c) check the cart (d) track the order
27. 27.👆 Two designs for the same task (each arrow is one tap). How many taps does Design A need?
    Design A: Home → Confirm → Address → Offers
    Design B: Home → Shop → Search → Pens → Cart → Confirm
28. 28.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. tap the Home tab
    2. open “Friend list”
    3. tap Back
    4. open “Badges”
    Which screen are you on now? (a) Home (b) Search (c) Friend list (d) Badges
29. 29.🧭 Why should every screen show where you are? (a) to look busy (b) to use more battery (c) to hide the menu (d) so users do not get lost
30. 30.👥 A school app has 35 students, 95 teachers and 120 parents as users. Which user group is the biggest? (a) teachers (b) students (c) parents
31. 31.Which of these is data? (a) your friends list (b) a slider for volume (c) a box to type a name (d) the game-over page
32. 32.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 36; // start at 36
    line 2: coins = coins + 3; // add 2
    line 3: coins = coins * 2; // double it
    line 4: coins = coins + 2; // add 2
    line 5: show(coins); // show it (a) line 1 (b) line 4 (c) line 2 (d) line 3
33. 33.🧪 What is the ACTUAL result of Test 2?
    🎟️ 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(13) → expected 100
    Test 2: price(14) → expected 100
    Test 3: price(11) → expected 50
34. 34.🗒️ Version 1 of a homework planner must be ready in 16 days. How many days are left for extras after the must-haves?
    add a homework task: 1 days
    set a due date: 4 days
    see tasks by day: 5 days
35. 35.Which of these is true of a menu button? (a) sits at the bottom (b) opens a list of pages (c) switches main sections (d) undoes one move
36. 36.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) see where the bus is (b) change the bus icon (c) show arrival time (d) pick your bus stop
37. 37.Which of these happens at the release stage? (a) write down the bugs (b) list what users need (c) talk to possible users (d) put it on an app store
38. 38.♿ Does this help everyone, or make the app harder to use: labels on every icon? (a) makes it harder (b) helps everyone
39. 39.🧩 How many buttons does this app screen have?
    [title] New Note
    [text box] Phone
    [slider] Volume
    [switch] Show hints
    [text box] Subject
    [button] Next
40. 40.True or false: a button with no action solves a real problem. (a) True (b) False

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