App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 936 · 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.👆 Two designs for the same task (each arrow is one tap). How many taps does Design B need?
   Design A: Home → Results → Confirm → Pay → Pens → Cart → Shop
   Design B: Home → Results → Size → Confirm
2. 2.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
   1. open “Map”
   2. tap Back
   3. open “Video”
   Which screen are you on now? (a) Video (b) Search (c) Home (d) Map
3. 3.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
   [title] Order Snacks
   [button] Start
   [text box] Email
4. 4.🔢 In a sign-up flow, which comes LAST? (a) type name and email (b) enter the code sent (c) see the home screen (d) make a password
5. 5.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
   Design A: Home → Offers → Size
   Design B: Home → Pens → Menu → Pay → Confirm → Offers
6. 6.💡 Does an app idea like a page of random dots solve a real problem? (a) Yes (b) No
7. 7.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
8. 8.🔁 What number does this code show?
   let marks = [4, 6, 10, 6, 19];
   let total = 0;
   for (let i = 0; i < marks.length; i++) {
     total = total + marks[i];
   }
   show(total);
9. 9.🔍 Which is the odd one out? (a) taking a photo (b) a result on screen (c) a beep sound (d) a pop-up message
10. 10.True or false: a website has a home-screen icon. (a) True (b) False
11. 11.🧰 What number does this code show?
    function double(n) {
      return n * 2;
    }
    show(double(7));
12. 12.🎯 Which app would help this user most: a reader who finds small print hard? (a) a big-text reader (b) a pocket-money tracker (c) a water reminder (d) a homework planner
13. 13.👆 The user taps the button 6 times. What number does the label show now?
    let lives = 8;
    button.onTap = function () {
      lives = lives + 5;
      label.text = lives;
    };
14. 14.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a buzz (vibration) (d) typing your age
15. 15.🧩 In an app, what is a switch for dark mode? (a) data (b) a button (c) a screen (d) an input
16. 16.True or false: an app comes from an app store. (a) True (b) False
17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 410; // typed by the user
    line 2: let off = 30; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 1 (b) line 2 (c) line 4 (d) line 3
18. 18.🎯 Which app would help this user most: a cook with no idea for dinner? (a) a recipe finder (b) a homework planner (c) a bus tracker (d) a pocket-money tracker
19. 19.💡 Which app idea solves this problem: friends argue over who pays? (a) a lost-and-found board (b) a study-room finder (c) a medicine reminder (d) a bill splitter
20. 20.True or false: a buzz (vibration) is an output. (a) True (b) False
21. 21.Which of these is a feature? (a) “What should I cook?” (b) “I keep missing the bus” (c) a reminder alarm (d) “Small text is hard”
22. 22.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(3));
23. 23.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 11 votes
    forgetting homework: 7 votes
    no quiet study place: 4 votes
24. 24.🗒️ A to-do app with no “add a task” feature is ___. (a) ready to release (b) missing a must-have (c) a nice extra (d) well planned
25. 25.🔐 Which permission does a selfie sticker app really need? (a) contacts (b) the microphone (c) the camera (d) location
26. 26.💾 What number does this code show?
    let notes = ["Art", "Sports"];
    notes.push("Hindi");
    show(notes.length);
27. 27.🧩 In an app, what is the settings page? (a) a button (b) data (c) an input (d) a screen
28. 28.Which of these is processing? (a) checking a password (b) taking a photo (c) a result on screen (d) a pop-up message
29. 29.🧪 One test case fails. Which one?
    🎟️ Rule: a ticket costs 50 for children under 10, and 100 for everyone else.
    function price(age) {
      if (age <= 10) {
        return 50;
      }
      return 100;
    }
    Test 1: price(10) → expected 100
    Test 2: price(7) → expected 50
    Test 3: price(16) → expected 100 (a) Test 3 (b) Test 2 (c) Test 1
30. 30.🔀 What does this sign-up rule show?
    let age = 14;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
31. 31.👥 A clinic app has 300 patients, 160 doctors and 95 nurses as users. How many more patients than doctors are there?
32. 32.Which of these app ideas solves a real problem? (a) a blank grey screen (b) a free study-room finder (c) a page of random dots (d) an app that just says hi
33. 33.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 32; // start at 32
    line 2: score = score + 2; // double it
    line 3: score = score - 1; // take away 1
    line 4: score = score + 2; // add 2
    line 5: show(score); // show it (a) line 2 (b) line 3 (c) line 1 (d) line 4
34. 34.🔍 Which is the odd one out? (a) put it on an app store (b) connect the data (c) write the store text (d) share the download link
35. 35.Which of these is a feature? (a) “Small text is hard” (b) “What should I cook?” (c) “I keep missing the bus” (d) a share button
36. 36.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Shop → Menu
    Design B: Home → Menu → Cart → Pay (a) Design A (b) Design B
37. 37.🔀 What number does this shop app show?
    let total = 360;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
38. 38.🧭 Which part of navigation sits at the bottom? (a) a menu button (b) the back button (c) a tab bar
39. 39.Which of these is true of a menu button? (a) opens a list of pages (b) shows 3 to 5 icons (c) goes to the last screen (d) sits at the bottom
40. 40.🚀 Which of these versions is the NEWEST?
    3.13.1, 2.23.2, 3.9.0, 3.8.5 (a) 3.13.1 (b) 2.23.2 (c) 3.8.5 (d) 3.9.0

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