App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 259 · 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.🗒️ Version 1 of a homework planner must be ready in 7 days. How many days are left for extras after the must-haves?
   add a homework task: 1 days
   set a due date: 3 days
   see tasks by day: 2 days
2. 2.🧭 Which part of navigation goes to the last screen? (a) a menu button (b) a tab bar (c) the back button
3. 3.🎨 Is this about UI or UX: the screen layout? (a) UX (b) UI
4. 4.🔢 In a quiz-app flow, which comes FIRST? (a) read a question (b) see the final score (c) tap “Start quiz” (d) see if it is right
5. 5.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let points = 43; // start at 43
   line 2: points = points * 2; // double it
   line 3: points = points - 1; // take away 1
   line 4: points = points - 5; // add 5
   line 5: show(points); // show it
6. 6.🎨 Is this about UI or UX: how easy sign-up is? (a) UX (b) UI
7. 7.Which of these is true of a website? (a) has a web address (b) is installed on a phone (c) has a home-screen icon (d) updates from the store
8. 8.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let lives = 39; // start at 39
   line 2: lives = lives * 2; // double it
   line 3: lives = lives + 5; // add 2
   line 4: show(lives); // show it
9. 9.💡 Which app idea solves this problem: Grandpa forgets his tablets? (a) a medicine reminder (b) a bill splitter (c) a lost-and-found board (d) a study-room finder
10. 10.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) dark blue on white
12. 12.🐞 After fixing a bug you should ___. (a) never test (b) delete the test (c) release at once (d) test it again
13. 13.🧪 What is the actual result of a test? (a) what the app really does (b) the app’s name (c) the test’s number (d) what we hope for
14. 14.True or false: speaking a command is processing. (a) False (b) True
15. 15.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Pay → Shop → Menu → Item
    Design B: Home → Cart → Pay (a) Design B (b) Design A
16. 16.🔢 In a sign-up flow, which comes first: “enter the code sent” or “open the app”? (a) enter the code sent (b) open the app
17. 17.💾 pop() takes off the last item. What does this code show?
    let friends = ["Zoya", "Meera", "Arjun"];
    friends.pop();
    show(friends[friends.length - 1]); (a) Zoya (b) Meera (c) Arjun
18. 18.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Body text: 23 px
    Label: 16 px
    Menu: 20 px
    Footer: 21 px
19. 19.💡 Does an app idea like a medicine reminder solve a real problem? (a) No (b) Yes
20. 20.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Chat tab
    2. open “Edit photo”
    3. tap the Feed tab
    Which screen are you on now? (a) Edit photo (b) Settings (c) Chat (d) Feed
21. 21.👆 Which of these is an event? (a) the font size (b) a list of names (c) the icon colour (d) the user taps a button
22. 22.🗒️ A to-do app with no “add a task” feature is ___. (a) well planned (b) a nice extra (c) missing a must-have (d) ready to release
23. 23.💡 Which app idea solves this problem: friends argue over who pays? (a) a medicine reminder (b) a lost-and-found board (c) a study-room finder (d) a bill splitter
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
25. 25.🛠️ At which stage do you write down the bugs? (a) the idea stage (b) the test stage (c) the build stage (d) the plan stage
26. 26.🔁 What number does this code show?
    let scores = [2, 14, 8, 1, 12];
    let total = 0;
    for (let i = 0; i < scores.length; i++) {
      total = total + scores[i];
    }
    show(total);
27. 27.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) see tasks by day (b) pick a theme colour (c) share tasks to friends (d) earn stickers
28. 28.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(65, 6));
29. 29.🎯 What is the best first step to learn what users need? (a) write the code (b) guess on your own (c) ask and watch users (d) pick the colours
30. 30.📱 Which one updates from the store: an app or a website? (a) a website (b) an app
31. 31.🔐 Is this permission request fair or too much: torch → contacts? (a) fair (b) too much
32. 32.Which of these app ideas solves a real problem? (a) a button with no action (b) a page of random dots (c) a library due-date alert (d) a blank grey screen
33. 33.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Menu: 10 px
    Hint: 25 px
    Label: 23 px
    Title: 22 px (a) Title (b) Hint (c) Menu (d) Label
34. 34.🔐 Which permission does a homework photo scanner really need? (a) the microphone (b) contacts (c) the camera (d) location
35. 35.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let score = 35; // start at 35
    line 2: score = score * 2; // double it
    line 3: score = score - 5; // take away 2
    line 4: show(score); // show it
36. 36.Which of these fits saving on the phone? (a) a shared to-do list (b) your last game level (c) photos on two devices (d) chat messages to friends
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Next button: 64 px tall
    Save button: 56 px tall
    Help button: 40 px tall
38. 38.♿ A screen has 12 icon buttons. Only 10 of them have a text label for screen readers. How many still need a label?
39. 39.🧪 One test case fails. Which one?
    📝 Rule: a quiz is passed with 6 or more right answers.
    function result(right) {
      if (right > 6) {
        return "Pass";
      }
      return "Try again";
    }
    Test 1: result(5) → expected Try again
    Test 2: result(7) → expected Pass
    Test 3: result(6) → expected Pass (a) Test 1 (b) Test 3 (c) Test 2
40. 40.✏️ What is the easiest way to draw a first wireframe? (a) a 3D printer (b) a microphone (c) pencil and paper (d) a phone case

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