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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 333 · 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.🎯 Which element does the selector #hero style? (a) <div id="hero"> (b) <div class="hero"> (c) <span class="box"> (d) <div id="top">
  2. 2.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
  3. 3.True or false: #logo is a class selector. (a) True (b) False
  4. 4.True or false: .note is a class selector. (a) False (b) True
  5. 5.True or false: .big is a class selector. (a) False (b) True
  6. 6.🎯 Which sign starts an id selector? (a) @ (b) . (c) & (d) #
  7. 7.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
  8. 8.True or false: #main is an element selector. (a) False (b) True
  9. 9.True or false: body is an id selector. (a) True (b) False
  10. 10.🎯 Which sign starts a class selector? (a) # (b) @ (c) . (d) &
  11. 11.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
  12. 12.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector
  13. 13.True or false: body is an element selector. (a) True (b) False
  14. 14.True or false: #hero is an element selector. (a) False (b) True
  15. 15.🎯 Which CSS selector matches this element?
    <div class="star" id="hero">Hello</div>     (a) .hero (b) .menu (c) #hero (d) #star
  16. 16.🎯 Which element does the selector .red style? (a) <h2 class="star"> (b) <h1 id="red"> (c) <h1 class="red"> (d) <h1 class="box">
  17. 17.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1>     (a) #intro (b) .star (c) .box (d) .top
  18. 18.🎯 Can many elements share the same class? (a) Yes (b) No
  19. 19.True or false: #hero is an id selector. (a) False (b) True
  20. 20.True or false: #end is an element selector. (a) True (b) False
  21. 21.🎯 Which CSS selector matches this element?
    <p class="note" id="end">Hello</p>     (a) #note (b) h1 (c) .end (d) p
  22. 22.True or false: .menu is a class selector. (a) False (b) True
  23. 23.True or false: #end is an id selector. (a) False (b) True
  24. 24.🎯 What kind of selector is body? (a) a class selector (b) an element selector (c) an id selector
  25. 25.🎯 Which element does the selector #hero style? (a) <li class="star"> (b) <h2 id="hero"> (c) <h2 class="hero"> (d) <h2 id="top">
  26. 26.🎯 What kind of selector is .note? (a) an id selector (b) a class selector (c) an element selector
  27. 27.🎯 Which CSS selector matches this element?
    <span class="menu" id="logo">Hello</span>     (a) p (b) #menu (c) span (d) #end
  28. 28.🎯 Which CSS selector matches this element?
    <li class="star" id="end">Hello</li>     (a) .menu (b) #hero (c) .star (d) #star
  29. 29.🎯 Which CSS selector matches this element?
    <div class="star" id="logo">Hello</div>     (a) .logo (b) .menu (c) .star (d) #end
  30. 30.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="intro">Hello</h2>     (a) .note (b) li (c) .intro (d) h2
  31. 31.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
  32. 32.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
  33. 33.True or false: #top is an id selector. (a) True (b) False
  34. 34.🎯 Which element does the selector h2 style? (a) <span id="logo"> (b) <h2 class="note"> (c) <li> (d) <div class="note">
  35. 35.🎯 Which CSS selector matches this element?
    <h2 class="box" id="logo">Hello</h2>     (a) #end (b) .box (c) #box (d) li
  36. 36.🎯 Which element does the selector .star style? (a) <p id="star"> (b) <p class="menu"> (c) <p class="star"> (d) <h1 class="note">
  37. 37.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
  38. 38.🎯 What kind of selector is #hero? (a) a class selector (b) an id selector (c) an element selector
  39. 39.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span>     (a) #top (b) .top (c) #intro (d) #big
  40. 40.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="star"> (c) <li class="box"> (d) <div class="menu">

Answer key

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

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