App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 466 · 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.Which of these makes the app harder to use? (a) sudden loud sounds (b) labels on every icon (c) big touch targets (d) text that can grow
2. 2.🔢 In a sign-up flow, which comes FIRST? (a) see the home screen (b) type name and email (c) make a password (d) open the app
3. 3.🗒️ Why keep version 1 small? (a) to look bigger (b) to use up storage (c) to learn from users soon (d) to confuse users
4. 4.True or false: a torch is a tool app. (a) True (b) False
5. 5.💾 What number does this code show?
   let notes = ["Maths", "Art", "Hindi", "Sports"];
   notes.push("Music");
   show(notes.length);
6. 6.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
   Caption: 12 px
   Body text: 17 px
   Footer: 19 px
7. 7.👆 What kind of event is this: the app starts up? (a) a timer event (b) a tap event (c) a text event (d) a load event
8. 8.🔁 What is the LAST line this code shows?
   let names = ["Kabir", "Meera", "Zoya", "Arjun", "Riya"];
   for (let i = 0; i < names.length; i++) {
     show("Hi, " + names[i]);
   } (a) Hi, Zoya (b) Hi, Kabir (c) Hi, Riya (d) Hi, Meera
9. 9.🔀 What does this sign-up rule show?
   let age = 12;
   if (age >= 13) {
     show("Welcome!");
   } else {
     show("Ask a parent");
   } (a) Welcome! (b) Ask a parent
10. 10.True or false: a pocket-money tracker is the best fit for a parent waiting at the bus stop. (a) False (b) True
11. 11.Which of these is a feature? (a) “Small text is hard” (b) “I keep missing the bus” (c) a reminder alarm (d) “I forget my homework”
12. 12.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let stars = 50; // start at 50
    line 2: stars = stars - 6; // take away 5
    line 3: stars = stars * 2; // double it
    line 4: show(stars); // show it (a) line 2 (b) line 3 (c) line 1
13. 13.🐞 What is a bug? (a) a new feature (b) a mistake in the code (c) a fast phone (d) a nice icon
14. 14.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let lives = 35; // start at 34
    line 2: lives = lives - 5; // take away 5
    line 3: lives = lives * 2; // double it
    line 4: lives = lives + 6; // add 6
    line 5: show(lives); // show it
15. 15.🔐 Which permission does a voice recorder really need? (a) the microphone (b) the camera (c) contacts (d) location
16. 16.🧰 A museum app works out the entry fee. What number does this code show?
    function fee(age) {
      if (age < 5) {
        return 0;
      }
      return 30;
    }
    show(fee(2) + fee(10));
17. 17.📲 What happens when you tap an app’s icon? (a) the phone charges (b) the app opens (c) the app is deleted (d) the sound turns off
18. 18.🔍 Which is the odd one out? (a) how users feel after (b) the screen layout (c) the icon shapes (d) the button colours
19. 19.🔢 In a photo-post flow, which comes LAST? (a) post the photo (b) open the camera screen (c) add a filter (d) take the photo
20. 20.♿ A screen has 7 icon buttons. Only 6 of them have a text label for screen readers. How many still need a label?
21. 21.True or false: a wireframe shows where things go. (a) False (b) True
22. 22.🧰 In function tip(bill), what is bill? (a) a parameter (b) an event (c) a loop (d) a screen
23. 23.🔁 What number does this code show?
    let scores = [31, 50, 53];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 60) {
        count = count + 1;
      }
    }
    show(count);
24. 24.👆 An event in an app is ___. (a) an app store (b) a kind of list (c) something that happens (d) a colour theme
25. 25.👆 The user taps the button 2 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) ON (b) OFF
26. 26.Which of these is true of a final design? (a) shows the real fonts (b) uses plain grey boxes (c) has no real colours (d) shows where things go
27. 27.Which of these helps everyone use the app? (a) strong colour contrast (b) fast-flashing lights (c) icons with no labels (d) colour as the only clue
28. 28.Which of these is an input? (a) typing your age (b) a pop-up message (c) a buzz (vibration) (d) checking a password
29. 29.True or false: a class leaderboard fits saving on the phone. (a) False (b) True
30. 30.🔐 Is this permission request fair or too much: torch → contacts? (a) too much (b) fair
31. 31.True or false: a racing challenge is a learning app. (a) False (b) True
32. 32.🔀 What does >= mean? (a) less than (b) greater than or equal (c) not equal (d) smaller or equal
33. 33.💡 After a survey, which need should version 1 solve? (a) a random need (b) the newest trend (c) the most common need (d) the rarest need
34. 34.🎯 Is this a user need or a feature: a share button? (a) a user need (b) a feature
35. 35.🔀 In this course’s code, which sign tests “is equal to”? (a) => (b) = (c) !== (d) ===
36. 36.True or false: a shared to-do list fits saving on the phone. (a) False (b) True
37. 37.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let coins = 32; // start at 32
    line 2: coins = coins + 4; // add 4
    line 3: coins = coins - 8; // take away 5
    line 4: show(coins); // show it
38. 38.🖼️ In this wireframe (top to bottom), what is right above the Add button?
    [ big picture ]
    [ tab bar ]
    [ Add button ]
    [ filter buttons ]
    [ list of items ] (a) list of items (b) filter buttons (c) tab bar (d) big picture
39. 39.Which of these is an output? (a) tapping a button (b) typing your age (c) a beep sound (d) working out a tip
40. 40.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let score = 46; // start at 46
    line 2: score = score + 2; // double it
    line 3: score = score + 2; // add 2
    line 4: show(score); // show it (a) line 1 (b) line 3 (c) line 2

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