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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 782 · 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.🔁 What is the LAST line this code shows?
    let names = ["Riya", "Meera", "Arjun", "Kabir", "Zoya"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Riya (b) Hi, Meera (c) Hi, Arjun (d) Hi, Zoya
  2. 2.👆 “On tap → do this” links an event to ___. (a) an action (b) a web address (c) a charger (d) a font
  3. 3.👆 The user taps the button 2 times. What number does the label show now?
    let lives = 8;
    button.onTap = function () {
      lives = lives + 3;
      label.text = lives;
    };
  4. 4.🧭 The app has tabs Home, Search, Profile. You start on Home, then:
    1. open “Map”
    2. tap Back
    3. open “Map”
    How many times must you tap Back to reach the main screen of this tab?
  5. 5.Which of these happens at the plan stage? (a) write the store text (b) try every button (c) share the download link (d) pick the features
  6. 6.🔁 What number does this code show?
    let scores = [12, 2, 18, 16, 5];
    let best = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] > best) {
        best = scores[i];
      }
    }
    show(best);
  7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🧭 The app has tabs Lessons, Quiz, Me. You start on Lessons, then:
    1. open “Edit photo”
    2. tap Back
    3. tap the Lessons tab
    How many times must you tap Back to reach the main screen of this tab?
  9. 9.🔢 In a sign-up flow, which comes first: “tap “Sign up”” or “make a password”? (a) tap “Sign up” (b) make a password
  10. 10.Which of these happens at the plan stage? (a) write the code (b) let friends try it (c) connect the data (d) draw the user flow
  11. 11.🎯 Is this a user need or a feature: “I forget my homework”? (a) a feature (b) a user need
  12. 12.💡 Which app idea solves this problem: friends argue over who pays? (a) a medicine reminder (b) a homework planner (c) a bill splitter (d) a study-room finder
  13. 13.💾 What number does this code show?
    let points = 9;
    points = points - 2;
    points = points + 4;
    show(points);
  14. 14.👆 The user taps the button 1 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  15. 15.🚀 Which of these versions is the NEWEST?
    3.16.6, 3.5.9, 2.29.0, 3.17.6     (a) 3.5.9 (b) 3.16.6 (c) 2.29.0 (d) 3.17.6
  16. 16.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a wireframe (b) a final design
  17. 17.🗒️ What is a must-have feature? (a) a colour theme (b) a nice extra (c) one the app cannot skip (d) a sound effect
  18. 18.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) pie-chart colours (b) export to a file (c) savings stickers (d) show the balance
  19. 19.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [button] Done
    [button] Back
    [text box] Age
    [switch] Remind me
    [button] Help
  20. 20.🐞 Each comment says what its line SHOULD do. Which line has the bug?
    line 1: let lives = 30; // start at 30
    line 2: lives = lives + 5; // add 5
    line 3: lives = lives + 2; // double it
    line 4: show(lives); // show it     (a) line 2 (b) line 3 (c) line 1
  21. 21.Which of these is about UI (the look)? (a) the button colours (b) whether users get lost (c) how easy sign-up is (d) how fast a task is done
  22. 22.True or false: a final design looks like the real app. (a) False (b) True
  23. 23.🧰 What is a function? (a) a type of phone (b) a screen size (c) a list of colours (d) a named block of code
  24. 24.Which of these happens at the build stage? (a) write the store text (b) put it on an app store (c) let friends try it (d) write the code
  25. 25.Which of these fits saving on the phone? (a) photos on two devices (b) a shared to-do list (c) the sound on/off setting (d) chat messages to friends
  26. 26.True or false: a cricket run chase is a learning app. (a) False (b) True
  27. 27.🧭 Which part of navigation shows 3 to 5 icons? (a) a tab bar (b) the back button (c) a menu button
  28. 28.🚀 Which of these versions is the NEWEST?
    3.17.1, 3.11.4, 2.20.2, 3.16.4     (a) 3.11.4 (b) 3.16.4 (c) 2.20.2 (d) 3.17.1
  29. 29.🔀 Which badge does this quiz app show?
    let marks = 75;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Silver (c) Gold
  30. 30.True or false: the game-over page is a screen. (a) True (b) False
  31. 31.True or false: a weather-near-me app needs the microphone. (a) False (b) True
  32. 32.Which of these is true of a final design? (a) looks like the real app (b) uses plain grey boxes (c) is a quick sketch (d) has no real colours
  33. 33.♿ Why add captions to videos? (a) so anyone can follow (b) to slow them down (c) to add colour (d) to hide the sound
  34. 34.🔁 What number does this code show?
    let scores = [77, 39, 82, 80, 98];
    let count = 0;
    for (let i = 0; i < scores.length; i++) {
      if (scores[i] >= 70) {
        count = count + 1;
      }
    }
    show(count);
  35. 35.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 3) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  36. 36.🧰 What number does this code show?
    function total(price, qty) {
      return price * qty;
    }
    show(total(95, 5));
  37. 37.🧰 What number does this code show?
    function points(stars) {
      return stars * 10 + 5;
    }
    show(points(1) + points(5));
  38. 38.True or false: a website has a web address. (a) False (b) True
  39. 39.🗒️ Version 1 of a quiz app must be ready in 15 days. How many days are left for extras after the must-haves?
    show a question: 2 days
    check the answer: 2 days
    show the score: 5 days
  40. 40.🔢 When you make an app, what comes right after “test the app”? (a) get an idea (b) build the app (c) plan the screens (d) release it

Answer key

  1. Hi, Zoya
  2. an action
  3. 14
  4. 1
  5. pick the features
  6. 18
  7. hard to read
  8. 0
  9. tap “Sign up”
  10. draw the user flow
  11. a user need
  12. a bill splitter
  13. 11
  14. 1
  15. 3.17.6
  16. a final design
  17. one the app cannot skip
  18. show the balance
  19. 3
  20. line 3
  21. the button colours
  22. True
  23. a named block of code
  24. write the code
  25. the sound on/off setting
  26. False
  27. a tab bar
  28. 3.17.1
  29. Silver
  30. True
  31. False
  32. looks like the real app
  33. so anyone can follow
  34. 4
  35. 2
  36. 475
  37. 70
  38. True
  39. 6
  40. release it

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