App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 243 · 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.🖼️ In this wireframe (top to bottom), what is right below the big picture?
   [ search box ]
   [ big picture ]
   [ top bar ]
   [ title text ]
   [ list of items ]
   [ filter buttons ] (a) list of items (b) search box (c) filter buttons (d) top bar
2. 2.🐞 This code has a bug. What number does it ACTUALLY show?
   line 1: let coins = 37; // start at 37
   line 2: coins = coins + 2; // take away 2
   line 3: coins = coins + 3; // add 3
   line 4: show(coins); // show it
3. 3.🗒️ Version 1 of a water reminder must be ready in 17 days. How many days are left for extras after the must-haves?
   set a reminder time: 4 days
   log a glass of water: 2 days
   see today’s total: 5 days
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
5. 5.True or false: a class leaderboard fits saving in the cloud. (a) False (b) True
6. 6.True or false: you spot a problem to solve at the test stage. (a) False (b) True
7. 7.♿ A screen has 12 icon buttons. Only 8 of them have a text label for screen readers. How many still need a label?
8. 8.🛠️ At which stage do you sketch the screens? (a) the plan stage (b) the build stage (c) the test stage (d) the release stage
9. 9.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let lives = 48; // start at 45
   line 2: lives = lives * 2; // double it
   line 3: lives = lives - 2; // take away 2
   line 4: show(lives); // show it
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Next button: 28 px tall
    Help button: 60 px tall (a) Done (b) Help (c) Next
11. 11.True or false: a wireframe shows where things go. (a) True (b) False
12. 12.♿ Does this help everyone, or make the app harder to use: big touch targets? (a) helps everyone (b) makes it harder
13. 13.🔢 When you make an app, which comes LAST? (a) plan the screens (b) build the app (c) test the app (d) release it
14. 14.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let points = 33; // start at 33
    line 2: points = points + 3; // add 3
    line 3: points = points * 2; // double it
    line 4: points = points - 5; // add 5
    line 5: show(points); // show it
15. 15.🧩 Which of these is a button on this screen?
    [title] Add Homework
    [text box] Email
    [text box] Name
    [button] Start
    [text box] Notes (a) Notes (b) Name (c) Start (d) Email
16. 16.🔢 In a photo-post flow, which comes LAST? (a) add a filter (b) take the photo (c) post the photo (d) write a caption
17. 17.📅 An app team plans for 5 days, builds for 12 days, tests for 3 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
18. 18.🧰 What is a function? (a) a screen size (b) a named block of code (c) a type of phone (d) a list of colours
19. 19.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(2) + points(4));
20. 20.🧰 What does this code show?
    function greet(name) {
      return "Hi, " + name + "!";
    }
    show(greet("Aman")); (a) Aman (b) Hi, Aman! (c) Hi, name! (d) greet
21. 21.🧭 Which part of navigation goes to the last screen? (a) a menu button (b) the back button (c) a tab bar
22. 22.📊 Survey: which problem bugs you most? How many students voted in all?
    missing the bus: 4 votes
    forgetting homework: 21 votes
    no quiet study place: 19 votes
23. 23.🗒️ Version 1 of a bus tracker must be ready in 9 days. How many days are left for extras after the must-haves?
    see where the bus is: 1 days
    show arrival time: 1 days
    pick your bus stop: 5 days
24. 24.🔐 Is this permission request fair or too much: camera app → camera? (a) too much (b) fair
25. 25.🎯 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 water reminder (d) a bus tracker
26. 26.🔢 In a photo-post flow, which comes first: “take the photo” or “write a caption”? (a) take the photo (b) write a caption
27. 27.🎨 Fewer taps to finish a task usually means ___. (a) more colours (b) better UX (c) worse UX (d) a bigger app
28. 28.🧩 Which input is best for choosing a volume level? (a) a switch (b) a slider (c) a title (d) a text box
29. 29.⚙️ What number does this app show?
    let bill = 80; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
30. 30.📅 An app team plans for 3 days, builds for 4 days, tests for 1 days and releases on 1 more day. Planning starts on day 1. On which day does building finish?
31. 31.Which of these makes the app harder to use? (a) captions on videos (b) tiny tap areas (c) text that can grow (d) strong colour contrast
32. 32.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let coins = 34; // start at 34
    line 2: coins = coins * 2; // double it
    line 3: coins = coins * 3; // double it
    line 4: coins = coins + 2; // add 2
    line 5: show(coins); // show it
33. 33.🔢 When you make an app, which comes FIRST? (a) plan the screens (b) build the app (c) get an idea (d) release it
34. 34.📱 Which one comes from an app store: an app or a website? (a) a website (b) an app
35. 35.👆 Two designs for the same task (each arrow is one tap). How many taps does the shorter design save?
    Design A: Home → Pay → Cart → Confirm
    Design B: Home → Shop → Cart → Search → Confirm → Pens → Menu
36. 36.Which of these is a feature? (a) “What should I cook?” (b) “I forget my homework” (c) “I keep missing the bus” (d) a search bar
37. 37.True or false: a voice recorder needs your location. (a) False (b) True
38. 38.🧩 Which of these is a button on this screen?
    [title] Sign Up
    [text box] Notes
    [text box] Subject
    [text box] Phone
    [button] Start
    [button] Help
    [button] Send
    [switch] Sound (a) Notes (b) Phone (c) Subject (d) Send
39. 39.👥 A library app has 75 readers, 180 librarians and 40 volunteers as users. How many users does it have in all?
40. 40.🗒️ You are planning version 1 of a quiz app. Which feature is a MUST-HAVE? (a) an avatar shop (b) background music (c) show a question (d) confetti effects

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