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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 506 · 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 sign starts a class selector? (a) # (b) @ (c) . (d) &
  2. 2.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
  3. 3.🎯 Which CSS selector matches this element?
    <span class="note" id="hero">Hello</span>     (a) p (b) .hero (c) span (d) #note
  4. 4.🎯 Can many elements share the same class? (a) No (b) Yes
  5. 5.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 5 (d) 2
  6. 6.True or false: li is an id selector. (a) False (b) True
  7. 7.True or false: .menu is a class selector. (a) True (b) False
  8. 8.True or false: #top is an id selector. (a) False (b) True
  9. 9.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li>     (a) #hero (b) li (c) #big (d) .red
  10. 10.🎯 Which CSS selector matches this element?
    <li class="big" id="logo">Hello</li>     (a) #end (b) #logo (c) #big (d) .red
  11. 11.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
  12. 12.🎯 Which element does the selector .box style? (a) <h1 class="star"> (b) <h1 class="box"> (c) <h2 class="menu"> (d) <h1 id="box">
  13. 13.True or false: .star is a class selector. (a) False (b) True
  14. 14.🎯 Which sign starts an id selector? (a) . (b) # (c) @ (d) &
  15. 15.🎯 Which element does the selector #hero style? (a) <li class="star"> (b) <h2 id="top"> (c) <h2 class="hero"> (d) <h2 id="hero">
  16. 16.True or false: .menu is an element selector. (a) True (b) False
  17. 17.True or false: .big is a class selector. (a) False (b) True
  18. 18.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
  19. 19.🎯 Which element does the selector .star style? (a) <div class="menu"> (b) <span class="note"> (c) <div class="star"> (d) <div id="star">
  20. 20.🎯 What kind of selector is .card? (a) a class selector (b) an element selector (c) an id selector
  21. 21.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
  22. 22.True or false: .menu is an id selector. (a) True (b) False
  23. 23.🎯 Which CSS selector matches this element?
    <h1 class="star" id="end">Hello</h1>     (a) #end (b) .end (c) #hero (d) h2
  24. 24.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
  25. 25.🎯 Which element does the selector h2 style? (a) <div class="big"> (b) <li> (c) <span id="hero"> (d) <h2 class="big">
  26. 26.🎯 Which element does the selector .note style? (a) <h2 id="note"> (b) <h2 class="note"> (c) <li class="red"> (d) <h2 class="big">
  27. 27.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1>     (a) .box (b) #red (c) .red (d) #intro
  28. 28.True or false: #logo is an id selector. (a) True (b) False
  29. 29.True or false: body is a class selector. (a) True (b) False
  30. 30.🎯 Which element does the selector #intro style? (a) <span class="intro"> (b) <span id="intro"> (c) <span id="main"> (d) <p class="menu">
  31. 31.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
  32. 32.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <p class="logo"> (c) <h1 class="box"> (d) <p id="logo">
  33. 33.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p>     (a) .intro (b) p (c) h1 (d) #star
  34. 34.True or false: #logo is a class selector. (a) False (b) True
  35. 35.🎯 Which CSS selector matches this element?
    <li class="box" id="hero">Hello</li>     (a) div (b) .star (c) .hero (d) li
  36. 36.True or false: p is a class selector. (a) True (b) False
  37. 37.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p>     (a) h1 (b) #main (c) .menu (d) #intro
  38. 38.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2>     (a) #note (b) .hero (c) h2 (d) #top
  39. 39.🎯 Which element does the selector h1 style? (a) <div id="hero"> (b) <li class="red"> (c) <h2> (d) <h1 class="red">
  40. 40.True or false: .note is an element selector. (a) True (b) False

Answer key

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

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