App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 69 · 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 is data? (a) a slider for volume (b) the settings page (c) tap to Start (d) your friends list
2. 2.💡 Does an app idea like a library due-date alert solve a real problem? (a) Yes (b) No
3. 3.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) white on black
4. 4.Which of these is a button? (a) your friends list (b) the settings page (c) the home page of an app (d) tap to go Next
5. 5.🧰 How do you run (call) a function called greet? (a) #greet (b) greet[] (c) greet() (d) run greet
6. 6.🔐 Is this permission request fair or too much: calculator → location? (a) too much (b) fair
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
8. 8.📱 Which one has a web address: an app or a website? (a) an app (b) a website
9. 9.💾 Which works with no internet at all? (a) a shared chat (b) a cloud backup (c) a cloud leaderboard (d) data saved on the phone
10. 10.🧩 In an app, what is the game-over page? (a) data (b) a button (c) a screen (d) an input
11. 11.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 36; // start at 35
    line 2: lives = lives + 2; // add 2
    line 3: lives = lives - 2; // take away 2
    line 4: lives = lives * 2; // double it
    line 5: show(lives); // show it
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 64 px tall
    Cancel button: 32 px tall
    Help button: 52 px tall
13. 13.🧪 A test case is an input together with its ___. (a) font size (b) app icon (c) expected result (d) screen colour
14. 14.⚙️ What number does this app show?
    let price = 460; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.📱 Which one opens from a link: an app or a website? (a) a website (b) an app
16. 16.True or false: a clear word like Save is good button design. (a) True (b) False
17. 17.👆 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) OFF (b) ON
18. 18.🧰 Why write a function? (a) to slow the app (b) to hide errors (c) to make code longer (d) to reuse code
19. 19.Which of these fits saving on the phone? (a) a shared to-do list (b) a draft you are typing (c) photos on two devices (d) chat messages to friends
20. 20.🧪 Values right at a limit, like age 12 for “under 12”, are called ___. (a) easy cases (b) edge cases (c) old cases (d) phone cases
21. 21.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Confirm → Pay → Shop → Address → Item
    Design B: Home → Search → Menu → Item (a) Design B (b) Design A
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Start button: 68 px tall
    Back button: 44 px tall (a) Back (b) Done (c) Start
23. 23.🐞 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 + 2; // add 2
    line 3: stars = stars * 3; // double it
    line 4: show(stars); // show it (a) line 2 (b) line 1 (c) line 3
24. 24.♿ Does this help everyone, or make the app harder to use: fast-flashing lights? (a) makes it harder (b) helps everyone
25. 25.📱 Which one updates from the store: an app or a website? (a) an app (b) a website
26. 26.True or false: “text that can grow” helps everyone use the app. (a) False (b) True
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 244; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 4 (b) line 3 (c) line 2 (d) line 1
28. 28.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Footer: 23 px
    Menu: 12 px
    Hint: 24 px (a) Hint (b) Menu (c) Footer
29. 29.♿ What should every icon-only button have for screen readers? (a) a bright colour (b) a text label (c) a sound (d) a long animation
30. 30.🔢 After an app is released, which comes first: “list what to fix” or “release an update”? (a) release an update (b) list what to fix
31. 31.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let coins = 48; // start at 46
    line 2: coins = coins - 5; // take away 5
    line 3: coins = coins + 6; // add 6
    line 4: show(coins); // show it (a) line 1 (b) line 3 (c) line 2
32. 32.👆 What kind of event is this: the search box changes? (a) a timer event (b) a load event (c) a tap event (d) a text event
33. 33.🔢 After an app is released, which comes first: “release an update” or “list what to fix”? (a) release an update (b) list what to fix
34. 34.📴 Which of these can often still work with no internet? (a) a video call (b) an online search (c) an installed app (d) a new website
35. 35.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Friend list”
    2. tap Back
    3. open “Map”
    4. open “Badges”
    Which screen are you on now? (a) Friend list (b) Home (c) Badges (d) Map
36. 36.True or false: the user presses Save is a tap event. (a) True (b) False
37. 37.🔢 In a quiz-app flow, which comes first: “tap “Start quiz”” or “see if it is right”? (a) tap “Start quiz” (b) see if it is right
38. 38.🎯 Is this a user need or a feature: a dark mode switch? (a) a feature (b) a user need
39. 39.🧭 Which part of navigation shows 3 to 5 icons? (a) the back button (b) a menu button (c) a tab bar
40. 40.True or false: a date picker is an input. (a) True (b) False

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