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App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 592 · 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 does this PIN rule show?
    let pin = "64865";
    if (pin.length === 4) {
      show("PIN saved");
    } else {
      show("Use 4 digits");
    }     (a) PIN saved (b) Use 4 digits
  2. 2.👆 The user taps the button 2 times. What number does the label show now?
    let likes = 0;
    button.onTap = function () {
      if (likes < 5) {
        likes = likes + 1;
      }
      label.text = likes;
    };
  3. 3.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Label: 12 px
    Body text: 12 px
    Menu: 15 px
  4. 4.♿ Our rule: text is at least 16 px. Which text on this screen is too small?
    Caption: 26 px
    Menu: 14 px
    Label: 23 px
    Footer: 19 px     (a) Menu (b) Label (c) Caption (d) Footer
  5. 5.🧩 In an app, what is tap to go Next? (a) an input (b) a screen (c) data (d) a button
  6. 6.🐞 What is a bug? (a) a fast phone (b) a new feature (c) a mistake in the code (d) a nice icon
  7. 7.🔁 What is the LAST line this code shows?
    let names = ["Zoya", "Meera", "Aman", "Arjun"];
    for (let i = 0; i < names.length; i++) {
      show("Hi, " + names[i]);
    }     (a) Hi, Zoya (b) Hi, Arjun (c) Hi, Meera (d) Hi, Aman
  8. 8.🔀 What number does this shop app show?
    let total = 670;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  9. 9.True or false: a library due-date alert solves no real problem. (a) True (b) False
  10. 10.Which of these requests asks for too much? (a) voice notes → microphone (b) quiz app → microphone (c) camera app → camera (d) map app → location
  11. 11.🛠️ At which stage do you try every button? (a) the idea stage (b) the test stage (c) the build stage (d) the plan stage
  12. 12.💾 What does this code show? (Positions start at 0.)
    let friends = ["Kabir", "Arjun", "Meera", "Aman", "Zoya"];
    show(friends[4]);     (a) Arjun (b) Meera (c) Zoya (d) Kabir
  13. 13.🔍 Which is the odd one out? (a) a cricket run chase (b) a word battle (c) a step counter (d) a racing challenge
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Cancel button: 36 px tall
    Back button: 44 px tall
  15. 15.🔍 Which is the odd one out? (a) the theme colours (b) the font size (c) how many taps it takes (d) the screen layout
  16. 16.💡 After a survey, which need should version 1 solve? (a) a random need (b) the most common need (c) the rarest need (d) the newest trend
  17. 17.🧩 What do we call one full page of an app? (a) a screen (b) a battery (c) a cable (d) a variable
  18. 18.✏️ Is this true of a wireframe or of a final design: looks like the real app? (a) a wireframe (b) a final design
  19. 19.💡 Which app idea solves this problem: projects pile up at once? (a) a bill splitter (b) a study-room finder (c) a medicine reminder (d) a homework planner
  20. 20.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [slider] Brightness
    [text box] Due date
    [text box] Name
    [switch] Sound
    [button] Back
    [button] Save
    [button] Help
  21. 21.🔢 In a quiz-app flow, which comes LAST? (a) see if it is right (b) read a question (c) tap “Start quiz” (d) see the final score
  22. 22.🔀 Which badge does this quiz app show?
    let marks = 51;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Bronze (b) Gold (c) Silver
  23. 23.🔀 When does the else part run? (a) never (b) when the test is true (c) when the test is false (d) always
  24. 24.🗂️ What kind of app is a torch? (a) a game (b) a health app (c) a tool app (d) a learning app
  25. 25.🧪 What is the ACTUAL result of Test 3?
    🎟️ Rule: a ticket costs 50 for children under 12, and 100 for everyone else.
    function price(age) {
      if (age < 12) {
        return 50;
      }
      return 100;
    }
    Test 1: price(10) → expected 50
    Test 2: price(12) → expected 100
    Test 3: price(16) → expected 100
  26. 26.🔢 After an app is released, which comes LAST? (a) read user reviews (b) release an update (c) test it again (d) list what to fix
  27. 27.Which of these is true of a final design? (a) is a quick sketch (b) uses plain grey boxes (c) shows where things go (d) has the real colours
  28. 28.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Sign Up
    [button] Help
    [switch] Sound
    [text box] Phone
    [slider] Volume
  29. 29.🔁 What number does this code show?
    let marks = [30, 60, 52, 27, 17];
    let count = 0;
    for (let i = 0; i < marks.length; i++) {
      if (marks[i] >= 40) {
        count = count + 1;
      }
    }
    show(count);
  30. 30.🧩 How many buttons does this app screen have?
    [title] Add Homework
    [text box] Subject
    [text box] Email
    [button] Done
    [switch] Sound
    [slider] Text size
    [text box] City
  31. 31.🔔 What is a message an app shows on your lock screen called? (a) a wireframe (b) a notification (c) a variable (d) a web address
  32. 32.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Add Homework
    [text box] Name
    [button] Next
    [button] Done
    [text box] Phone
  33. 33.🔢 After an app is released, which comes FIRST? (a) list what to fix (b) read user reviews (c) release an update (d) fix and improve
  34. 34.🧰 What does this code show?
    function greet(name) {
      return "Well done, " + name + "!";
    }
    show(greet("Arjun"));     (a) Arjun (b) Well done, Arjun! (c) greet (d) Well done, name!
  35. 35.True or false: a puzzle with levels is a game. (a) False (b) True
  36. 36.🔀 What number does this shop app show?
    let total = 370;
    if (total > 500) {
      total = total - 50;
    }
    show(total);
  37. 37.🎯 Why learn about users before you build? (a) to pick a logo (b) to build what they need (c) to slow it down (d) to make it longer
  38. 38.♿ Does this help everyone, or make the app harder to use: captions on videos? (a) makes it harder (b) helps everyone
  39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔀 Which badge does this quiz app show?
    let marks = 63;
    if (marks >= 80) {
      show("Gold");
    } else if (marks >= 50) {
      show("Silver");
    } else {
      show("Bronze");
    }     (a) Silver (b) Gold (c) Bronze

Answer key

  1. Use 4 digits
  2. 2
  3. 3
  4. Menu
  5. a button
  6. a mistake in the code
  7. Hi, Arjun
  8. 620
  9. False
  10. quiz app → microphone
  11. the test stage
  12. Zoya
  13. a step counter
  14. 0
  15. how many taps it takes
  16. the most common need
  17. a screen
  18. a final design
  19. a homework planner
  20. 3
  21. see the final score
  22. Silver
  23. when the test is false
  24. a tool app
  25. 100
  26. release an update
  27. has the real colours
  28. 3
  29. 2
  30. 1
  31. a notification
  32. 2
  33. read user reviews
  34. Well done, Arjun!
  35. True
  36. 370
  37. to build what they need
  38. helps everyone
  39. easy to read
  40. Silver

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