App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 117 · 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 fits saving in the cloud? (a) your last game level (b) notes to read offline (c) a shared to-do list (d) the sound on/off setting
2. 2.🔍 Which is the odd one out? (a) add the buttons (b) connect the data (c) write down the bugs (d) write the code
3. 3.Which of these is a screen? (a) the settings page (b) tap to Start (c) tap to Save (d) today’s step count
4. 4.Which of these is true of a wireframe? (a) has no real colours (b) uses the final pictures (c) has the real colours (d) shows the real fonts
5. 5.🔁 What number does this code show?
   let marks = [60, 14, 53, 28];
   let count = 0;
   for (let i = 0; i < marks.length; i++) {
     if (marks[i] >= 50) {
       count = count + 1;
     }
   }
   show(count);
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 36 px tall
   Done button: 64 px tall
   Start button: 56 px tall
   Save button: 32 px tall
7. 7.🔐 Is this permission request fair or too much: camera app → camera? (a) too much (b) fair
8. 8.🔢 In a food-order flow, what comes right after “check the cart”? (a) pay for the order (b) open the menu (c) add it to the cart (d) track the order
9. 9.🔐 Which permission does a weather-near-me app really need? (a) the microphone (b) the camera (c) location (d) contacts
10. 10.🚀 Which version is newer: 1.19.0 or 1.3.1? (a) 1.19.0 (b) 1.3.1
11. 11.🔀 What number does this shop app show?
    let total = 210;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
12. 12.🔢 In a photo-post flow, which comes LAST? (a) write a caption (b) post the photo (c) take the photo (d) open the camera screen
13. 13.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Footer: 16 px
    Label: 16 px
    Caption: 21 px
14. 14.🧭 Tapping a tab usually takes you to ___. (a) a random page (b) that tab’s main screen (c) the last app used (d) the phone settings
15. 15.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(25, 6));
16. 16.📊 Survey: which problem bugs you most? How many students voted in all?
    no quiet study place: 5 votes
    missing the bus: 20 votes
    losing water bottles: 4 votes
17. 17.🚀 What should an app ask for only when it really needs it? (a) its icon (b) a font (c) its name (d) a permission
18. 18.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 35; // start at 35
    line 2: coins = coins * 2; // double it
    line 3: coins = coins + 2; // add 2
    line 4: coins = coins + 3; // add 2
    line 5: show(coins); // show it
19. 19.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔀 What does this sign-up rule show?
    let age = 10;
    if (age >= 13) {
      show("Welcome!");
    } else {
      show("Ask a parent");
    } (a) Ask a parent (b) Welcome!
21. 21.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Feed tab
    2. tap the Settings tab
    3. open “Friend list”
    4. open “Map”
    Which screen are you on now? (a) Map (b) Friend list (c) Feed (d) Chat
22. 22.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) taking a photo (d) adding up a bill
23. 23.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. open “Friend list”
    2. open “Video”
    3. tap the Chat tab
    How many times must you tap Back to reach the main screen of this tab?
24. 24.🎯 Who are the users of an app? (a) only the testers (b) the app icons (c) only the coders (d) the people who use it
25. 25.True or false: a big, easy tap area is poor button design. (a) False (b) True
26. 26.💡 Which app idea solves this problem: the library is always full? (a) a homework planner (b) a medicine reminder (c) a study-room finder (d) a bill splitter
27. 27.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 41; // start at 38
    line 2: points = points * 2; // double it
    line 3: points = points - 1; // take away 1
    line 4: show(points); // show it
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Save button: 48 px tall
    Back button: 48 px tall
    Help button: 48 px tall (a) Save (b) Back (c) Help (d) Start
29. 29.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(75, 4));
30. 30.💡 After a survey, which need should version 1 solve? (a) the most common need (b) the rarest need (c) the newest trend (d) a random need
31. 31.🧭 The app has tabs Feed, Chat, Settings. You start on Feed, then:
    1. tap the Chat tab
    2. tap the Feed tab
    3. tap the Chat tab
    Which screen are you on now? (a) Feed (b) Chat (c) Settings
32. 32.🖼️ In this wireframe (top to bottom), what is right below the top bar?
    [ filter buttons ]
    [ Save button ]
    [ top bar ]
    [ search box ] (a) filter buttons (b) Save button (c) search box
33. 33.🚀 Your app is at version 4.6.4. The next release fixes a small bug. What is its version number? (a) 4.7.0 (b) 5.0.0 (c) 4.6.5 (d) 4.7.4
34. 34.Which of these is processing? (a) a result on screen (b) tapping a button (c) a pop-up message (d) sorting the scores
35. 35.🚀 Which version is newer: 1.9.1 or 1.19.2? (a) 1.19.2 (b) 1.9.1
36. 36.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) input (c) output
37. 37.Which of these is true of an app? (a) opens from a link (b) needs no installing (c) comes from an app store (d) has a web address
38. 38.True or false: a word battle is a tool app. (a) False (b) True
39. 39.🔀 What number does this shop app show?
    let total = 600;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
40. 40.💡 Does an app idea like a medicine reminder solve a real problem? (a) Yes (b) No

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