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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 454 · 40 questions
TalentJR

Code tip (Dot for class, hash for id): p matches every <p>; .note matches class="note"; #top matches id="top". A dot means class, a hash means id — mixing them up matches nothing. Many elements can share a class; an id belongs to only one element.

NameDateTime takenScore ___ / 40
  1. 1.🎯 What kind of selector is .note? (a) an id selector (b) a class selector (c) an element selector
  2. 2.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
  3. 3.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
  4. 4.True or false: .big is an element selector. (a) False (b) True
  5. 5.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
  6. 6.🎯 Can many elements share the same class? (a) No (b) Yes
  7. 7.True or false: body is an element selector. (a) False (b) True
  8. 8.🎯 Which CSS selector matches this element?
    <h2 class="big" id="intro">Hello</h2>     (a) .big (b) #main (c) #big (d) .red
  9. 9.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1>     (a) .logo (b) #end (c) #logo (d) #star
  10. 10.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1>     (a) h1 (b) .top (c) #red (d) .box
  11. 11.True or false: h1 is a class selector. (a) False (b) True
  12. 12.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
  13. 13.🎯 Which element does the selector #hero style? (a) <h1 id="hero"> (b) <h2 class="menu"> (c) <h1 id="top"> (d) <h1 class="hero">
  14. 14.True or false: #logo is an id selector. (a) False (b) True
  15. 15.🎯 What kind of selector is p? (a) an element selector (b) a class selector (c) an id selector
  16. 16.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p>     (a) #logo (b) #star (c) .menu (d) .logo
  17. 17.True or false: img is a class selector. (a) True (b) False
  18. 18.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
  19. 19.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
  20. 20.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
  21. 21.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
  22. 22.🎯 Which sign starts an id selector? (a) # (b) . (c) & (d) @
  23. 23.🎯 Which sign starts a class selector? (a) # (b) & (c) @ (d) .
  24. 24.🎯 Which element does the selector #hero style? (a) <h2 class="hero"> (b) <li class="star"> (c) <h2 id="top"> (d) <h2 id="hero">
  25. 25.True or false: .menu is a class selector. (a) False (b) True
  26. 26.🎯 Which element does the selector p style? (a) <li id="top"> (b) <p class="box"> (c) <h2 class="box"> (d) <h1>
  27. 27.🎯 Which element does the selector .box style? (a) <p id="box"> (b) <p class="box"> (c) <p class="star"> (d) <h1 class="menu">
  28. 28.🎯 Which element does the selector li style? (a) <div> (b) <p id="main"> (c) <li class="box"> (d) <span class="box">
  29. 29.🎯 Which element does the selector .note style? (a) <h2 class="red"> (b) <h1 class="big"> (c) <h1 class="note"> (d) <h1 id="note">
  30. 30.True or false: .big is an id selector. (a) True (b) False
  31. 31.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span>     (a) .star (b) #box (c) #main (d) .main
  32. 32.🎯 What kind of selector is .card? (a) an element selector (b) a class selector (c) an id selector
  33. 33.True or false: body is a class selector. (a) True (b) False
  34. 34.🎯 Which CSS selector matches this element?
    <span class="big" id="logo">Hello</span>     (a) .red (b) #end (c) span (d) .logo
  35. 35.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p>     (a) .hero (b) #note (c) p (d) h1
  36. 36.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="box"> (c) <li class="star"> (d) <div class="menu">
  37. 37.🎯 Which CSS selector matches this element?
    <li class="star" id="hero">Hello</li>     (a) .star (b) #top (c) .hero (d) .menu
  38. 38.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
  39. 39.🎯 Which element does the selector div style? (a) <span> (b) <div class="big"> (c) <p class="big"> (d) <h1 id="logo">
  40. 40.🎯 Which CSS selector matches this element?
    <p class="menu" id="end">Hello</p>     (a) #end (b) #menu (c) h1 (d) .note

Answer key

  1. a class selector
  2. 1
  3. an element selector
  4. False
  5. an element selector
  6. Yes
  7. True
  8. .big
  9. #logo
  10. h1
  11. False
  12. an id selector
  13. <h1 id="hero">
  14. True
  15. an element selector
  16. #logo
  17. False
  18. a class selector
  19. an id selector
  20. an element selector
  21. a class selector
  22. #
  23. .
  24. <h2 id="hero">
  25. True
  26. <p class="box">
  27. <p class="box">
  28. <li class="box">
  29. <h1 class="note">
  30. False
  31. #main
  32. a class selector
  33. False
  34. span
  35. p
  36. <li class="box">
  37. .star
  38. an id selector
  39. <div class="big">
  40. #end

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