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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 205 · 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 #intro style? (a) <div class="box"> (b) <li class="intro"> (c) <li id="intro"> (d) <li id="main">
  2. 2.True or false: .big is a class selector. (a) False (b) True
  3. 3.🎯 Which element does the selector p style? (a) <h1> (b) <li id="top"> (c) <h2 class="menu"> (d) <p class="menu">
  4. 4.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
  5. 5.🎯 What kind of selector is #main? (a) an element selector (b) a class selector (c) an id selector
  6. 6.True or false: p is an element selector. (a) False (b) True
  7. 7.🎯 What kind of selector is .big? (a) an element selector (b) a class selector (c) an id selector
  8. 8.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
  9. 9.True or false: #top is an id selector. (a) True (b) False
  10. 10.🎯 Can many elements share the same class? (a) No (b) Yes
  11. 11.🎯 Which element does the selector .red style? (a) <div class="red"> (b) <div class="box"> (c) <span class="star"> (d) <div id="red">
  12. 12.True or false: #hero is an element selector. (a) False (b) True
  13. 13.True or false: #logo is an id selector. (a) False (b) True
  14. 14.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
  15. 15.True or false: .star is a class selector. (a) True (b) False
  16. 16.🎯 Which element does the selector .note style? (a) <li id="note"> (b) <li class="note"> (c) <li class="big"> (d) <div class="red">
  17. 17.🎯 Which CSS selector matches this element?
    <span class="star" id="logo">Hello</span>     (a) span (b) .logo (c) .menu (d) #end
  18. 18.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
  19. 19.🎯 Which sign starts an id selector? (a) # (b) . (c) & (d) @
  20. 20.🎯 Which element does the selector .star style? (a) <h1 class="menu"> (b) <h1 id="star"> (c) <h2 class="note"> (d) <h1 class="star">
  21. 21.🎯 Which element does the selector .red style? (a) <li class="red"> (b) <li class="box"> (c) <div class="star"> (d) <li id="red">
  22. 22.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
  23. 23.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1>     (a) .red (b) #red (c) #intro (d) .top
  24. 24.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
  25. 25.🎯 Which element does the selector div style? (a) <p class="star"> (b) <h1 id="top"> (c) <div class="star"> (d) <span>
  26. 26.True or false: img is an id selector. (a) False (b) True
  27. 27.True or false: body is an id selector. (a) False (b) True
  28. 28.🎯 Which element does the selector .big style? (a) <div id="big"> (b) <div class="red"> (c) <span class="box"> (d) <div class="big">
  29. 29.🎯 Which element does the selector #top style? (a) <span class="box"> (b) <div id="intro"> (c) <div class="top"> (d) <div id="top">
  30. 30.🎯 Which element does the selector div style? (a) <h1 id="intro"> (b) <div class="box"> (c) <p class="box"> (d) <span>
  31. 31.True or false: #hero is an id selector. (a) True (b) False
  32. 32.🎯 Which element does the selector .note style? (a) <h2 class="red"> (b) <h1 id="note"> (c) <h1 class="note"> (d) <h1 class="big">
  33. 33.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1>     (a) h2 (b) .top (c) #intro (d) #top
  34. 34.True or false: .menu is an element selector. (a) False (b) True
  35. 35.🎯 Which CSS selector matches this element?
    <li class="red" id="end">Hello</li>     (a) div (b) #red (c) #end (d) .box
  36. 36.True or false: .big is an id selector. (a) False (b) True
  37. 37.🎯 Which CSS selector matches this element?
    <li class="big" id="main">Hello</li>     (a) li (b) div (c) .main (d) #logo
  38. 38.🎯 Which CSS selector matches this element?
    <p class="big" id="end">Hello</p>     (a) #hero (b) p (c) h1 (d) .red
  39. 39.True or false: p is a class selector. (a) True (b) False
  40. 40.True or false: h1 is an id selector. (a) True (b) False

Answer key

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

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