App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 908 · 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 kind of event is this: a finger hits Like? (a) a timer event (b) a text event (c) a load event (d) a tap event
2. 2.Which of these fits saving on the phone? (a) photos on two devices (b) a shared to-do list (c) a class leaderboard (d) notes to read offline
3. 3.📱 Which one opens in a web browser: an app or a website? (a) an app (b) a website
4. 4.Which of these is about UX (the experience)? (a) the theme colours (b) the icon shapes (c) the button colours (d) how many taps it takes
5. 5.Which of these app ideas solves no real problem? (a) a medicine reminder (b) a free study-room finder (c) an app that just says hi (d) a bill splitter
6. 6.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
   Hint: 19 px
   Footer: 27 px
   Body text: 13 px (a) Footer (b) Hint (c) Body text
7. 7.True or false: a website updates from the store. (a) False (b) True
8. 8.🔀 What does this sign-up rule show?
   let age = 15;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Ask a parent (b) Welcome!
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 60; // typed by the user
   line 2: let qty = 6; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 2 (b) line 3 (c) line 4 (d) line 1
10. 10.🔢 In a photo-post flow, which comes FIRST? (a) open the camera screen (b) take the photo (c) post the photo (d) add a filter
11. 11.True or false: buttons almost touching is poor button design. (a) False (b) True
12. 12.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 800 or more; otherwise it costs 40.
    function delivery(total) {
      if (total > 800) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(600) → expected 40
    Test 2: delivery(950) → expected 0
    Test 3: delivery(800) → expected 0
13. 13.🔐 Is this permission request fair or too much: map app → location? (a) too much (b) fair
14. 14.Which of these happens at the release stage? (a) spot a problem to solve (b) put it on an app store (c) connect the data (d) talk to possible users
15. 15.🗒️ Version 1 of a quiz app must be ready in 10 days. How many days are left for extras after the must-haves?
    show a question: 1 days
    check the answer: 4 days
    show the score: 5 days
16. 16.Which of these fits saving on the phone? (a) a shared to-do list (b) chat messages to friends (c) photos on two devices (d) a draft you are typing
17. 17.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
18. 18.📅 An app team plans for 2 days, builds for 12 days, tests for 1 days and releases on 1 more day. How many more days does building take than testing?
19. 19.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 38; // start at 38
    line 2: points = points * 2; // double it
    line 3: points = points + 2; // double it
    line 4: show(points); // show it
20. 20.🔀 What number does this shop app show?
    let total = 790;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
21. 21.True or false: an app is installed on a phone. (a) True (b) False
22. 22.🧪 One test case fails. Which one?
    🎟️ 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(12) → expected 100
    Test 2: price(10) → expected 50
    Test 3: price(18) → expected 100 (a) Test 2 (b) Test 3 (c) Test 1
23. 23.🐞 After fixing a bug you should ___. (a) never test (b) delete the test (c) test it again (d) release at once
24. 24.♿ Accessibility means an app works for ___. (a) only experts (b) only the coder (c) nobody (d) everyone
25. 25.🔁 What number does this code show?
    let scores = [86, 65, 12, 32];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
26. 26.🎯 Which app would help this user most: a student who keeps forgetting due dates? (a) a homework planner (b) a big-text reader (c) a recipe finder (d) a water reminder
27. 27.🗂️ What kind of app is a sleep tracker? (a) a learning app (b) a health app (c) a game (d) a tool app
28. 28.Which of these is data? (a) the home page of an app (b) the game-over page (c) a switch for dark mode (d) your saved notes
29. 29.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let lives = 38; // start at 37
    line 2: lives = lives * 2; // double it
    line 3: lives = lives - 5; // take away 5
    line 4: show(lives); // show it
30. 30.🔢 When you make an app, which comes first: “get an idea” or “plan the screens”? (a) plan the screens (b) get an idea
31. 31.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(4) + points(0));
32. 32.🧰 What number does this code show?
    function triple(n) {
      return n * 3;
    }
    show(triple(35));
33. 33.👆 The user taps the button 3 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
34. 34.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Help page”
    2. open “Badges”
    3. tap Back
    4. tap the Home tab
    Which screen are you on now? (a) Help page (b) Search (c) Home (d) Badges
35. 35.True or false: a draft you are typing fits saving on the phone. (a) False (b) True
36. 36.🎯 Is this a user need or a feature: a dark mode switch? (a) a feature (b) a user need
37. 37.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Item → Menu → Shop
    Design B: Home → Size → Cart → Offers → Menu → Item → Address (a) Design B (b) Design A
38. 38.✏️ Why draw a wireframe before coding? (a) it runs the app (b) it saves data (c) changes are quick (d) it adds colours
39. 39.🔀 A screen with no way forward or back is called a ___. (a) shortcut (b) tab bar (c) home screen (d) dead end
40. 40.🔐 Is this permission request fair or too much: quiz app → microphone? (a) fair (b) too much

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