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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 449 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🎨 Is this about UI or UX: the screen layout? (a) UX (b) UI
  2. 2.Which of these is true of a tab bar? (a) undoes one move (b) switches main sections (c) opens a list of pages (d) hides extra links
  3. 3.🧭 Which part of navigation opens a list of pages? (a) a tab bar (b) the back button (c) a menu button
  4. 4.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
  5. 5.True or false: how users feel after is about UX (the experience). (a) False (b) True
  6. 6.🔁 What number does this code show?
    let runs = [1, 4, 18, 6];
    let total = 0;
    for (let i = 0; i < runs.length; i++) {
      total = total + runs[i];
    }
    show(total);
  7. 7.True or false: a wireframe shows where things go. (a) True (b) False
  8. 8.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 2) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  9. 9.♿ A screen has 12 icon buttons. Only 2 of them have a text label for screen readers. How many still need a label?
  10. 10.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  11. 11.True or false: a clear word like Save is good button design. (a) False (b) True
  12. 12.🛠️ At which stage do you talk to possible users? (a) the idea stage (b) the test stage (c) the release stage (d) the plan stage
  13. 13.🗒️ 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: 3 days
    show arrival time: 2 days
    pick your bus stop: 4 days
  14. 14.💾 Saving data in the cloud lets you ___. (a) skip the internet (b) shrink the app (c) use it on any device (d) never need a password
  15. 15.🔢 After an app is released, what comes right after “test it again”? (a) fix and improve (b) list what to fix (c) read user reviews (d) release an update
  16. 16.Which of these happens at the build stage? (a) spot a problem to solve (b) write the code (c) talk to possible users (d) let friends try it
  17. 17.Which of these is a feature? (a) “I keep missing the bus” (b) “What should I cook?” (c) “I forget my homework” (d) a reminder alarm
  18. 18.👆 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
  19. 19.🖼️ In this wireframe (top to bottom), what is right below the Save button?
    [ Save button ]
    [ Add button ]
    [ tab bar ]
    [ title text ]
    [ list of items ]
    [ top bar ]     (a) list of items (b) Add button (c) top bar (d) title text
  20. 20.Which of these app ideas solves a real problem? (a) a button with no action (b) a blank grey screen (c) a library due-date alert (d) a page of random dots
  21. 21.💾 What number does this code show?
    let coins = 6;
    coins = coins - 4;
    coins = coins + 2;
    show(coins);
  22. 22.💡 An app that tries to do everything at once is usually ___. (a) finished fast (b) very small (c) hard to use (d) easy to build
  23. 23.🗒️ Version 1 of a homework planner must be ready in 9 days. How many days are left for extras after the must-haves?
    add a homework task: 1 days
    set a due date: 1 days
    see tasks by day: 4 days
  24. 24.Which of these app ideas solves no real problem? (a) a lost-and-found board (b) a medicine reminder (c) a page of random dots (d) a bill splitter
  25. 25.Which of these is a button? (a) today’s step count (b) the home page of an app (c) the settings page (d) tap to Start
  26. 26.🧪 How many of these test cases pass?
    🚚 Rule: delivery is free (0) when the order is 500 or more; otherwise it costs 40.
    function delivery(total) {
      if (total >= 500) {
        return 0;
      }
      return 40;
    }
    Test 1: delivery(850) → expected 0
    Test 2: delivery(700) → expected 0
    Test 3: delivery(300) → expected 40
  27. 27.⚙️ What number does this app show?
    let price = 560; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
  28. 28.🗒️ You are planning version 1 of a homework planner. Which feature is a MUST-HAVE? (a) earn stickers (b) pick a theme colour (c) share tasks to friends (d) add a homework task
  29. 29.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Search → Offers
    Design B: Home → Pay → Search → Address     (a) Design B (b) Design A
  30. 30.🐞 This code has a bug. What number does it ACTUALLY show?
    line 1: let lives = 32; // start at 32
    line 2: lives = lives + 1; // take away 1
    line 3: lives = lives - 4; // take away 4
    line 4: lives = lives - 4; // take away 4
    line 5: show(lives); // show it
  31. 31.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(5));
  32. 32.🔀 What number does this shop app show?
    let total = 290;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 56 px tall
    Save button: 52 px tall
    Help button: 40 px tall     (a) Done (b) Help (c) Send (d) Save
  34. 34.Which of these is about UX (the experience)? (a) the font size (b) the theme colours (c) the screen layout (d) how users feel after
  35. 35.💾 What does this code show? (Positions start at 0.)
    let songs = ["Stars", "Ocean", "Sunrise", "Monsoon", "Kites"];
    show(songs[4]);     (a) Stars (b) Ocean (c) Sunrise (d) Kites
  36. 36.📊 Survey: which problem bugs you most? How many students voted in all?
    wasting pocket money: 18 votes
    missing the bus: 5 votes
    forgetting homework: 11 votes
  37. 37.👆 What kind of event is this: the app starts up? (a) a timer event (b) a text event (c) a load event (d) a tap event
  38. 38.🧩 Scores, notes and settings that an app keeps are called ___. (a) data (b) tabs (c) buttons (d) screens
  39. 39.Which of these is true of a tab bar? (a) goes to the last screen (b) undoes one move (c) opens a list of pages (d) sits at the bottom
  40. 40.🔢 In a sign-up flow, which comes FIRST? (a) enter the code sent (b) type name and email (c) open the app (d) tap “Sign up”

Answer key

  1. UI
  2. switches main sections
  3. a menu button
  4. input
  5. True
  6. 29
  7. True
  8. 2
  9. 10
  10. poor design
  11. True
  12. the idea stage
  13. 0
  14. use it on any device
  15. release an update
  16. write the code
  17. a reminder alarm
  18. OFF
  19. Add button
  20. a library due-date alert
  21. 4
  22. hard to use
  23. 3
  24. a page of random dots
  25. tap to Start
  26. 3
  27. 530
  28. add a homework task
  29. Design A
  30. 25
  31. 70
  32. 290
  33. Help
  34. how users feel after
  35. Kites
  36. 34
  37. a load event
  38. data
  39. sits at the bottom
  40. open the app

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