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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 902 · 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.True or false: #logo is an id selector. (a) False (b) True
  2. 2.True or false: p is an element selector. (a) True (b) False
  3. 3.True or false: h1 is an element selector. (a) True (b) False
  4. 4.🎯 Which element does the selector .star style? (a) <li id="star"> (b) <li class="menu"> (c) <div class="note"> (d) <li class="star">
  5. 5.🎯 Which CSS selector matches this element?
    <h1 class="box" id="hero">Hello</h1>     (a) .star (b) h2 (c) #top (d) .box
  6. 6.🎯 Which element does the selector span style? (a) <span class="note"> (b) <p> (c) <h1 class="note"> (d) <h2 id="end">
  7. 7.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
  8. 8.🎯 Which element does the selector .big style? (a) <div class="box"> (b) <li class="red"> (c) <li id="big"> (d) <li class="big">
  9. 9.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span>     (a) #main (b) #logo (c) .main (d) #box
  10. 10.True or false: .star is a class selector. (a) False (b) True
  11. 11.🎯 Can many elements share the same class? (a) Yes (b) No
  12. 12.🎯 Which CSS selector matches this element?
    <div class="red" id="hero">Hello</div>     (a) .box (b) #red (c) .hero (d) div
  13. 13.🎯 Which CSS selector matches this element?
    <div class="note" id="end">Hello</div>     (a) span (b) #end (c) #note (d) .big
  14. 14.🎯 Which element does the selector li style? (a) <div> (b) <p id="logo"> (c) <span class="red"> (d) <li class="red">
  15. 15.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <h2 class="top"> (c) <li class="note"> (d) <h2 id="top">
  16. 16.🎯 Which element does the selector #intro style? (a) <h1 class="intro"> (b) <h2 class="box"> (c) <h1 id="main"> (d) <h1 id="intro">
  17. 17.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p>     (a) #star (b) h1 (c) p (d) .logo
  18. 18.True or false: .star is an id selector. (a) True (b) False
  19. 19.True or false: .big is a class selector. (a) False (b) True
  20. 20.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li>     (a) #note (b) #hero (c) div (d) #top
  21. 21.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2>     (a) h2 (b) #top (c) .hero (d) #big
  22. 22.🎯 Which sign starts a class selector? (a) . (b) & (c) @ (d) #
  23. 23.🎯 Which CSS selector matches this element?
    <li class="big" id="main">Hello</li>     (a) #big (b) #logo (c) .red (d) #main
  24. 24.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
  25. 25.🎯 Which sign starts an id selector? (a) & (b) @ (c) . (d) #
  26. 26.🎯 Which CSS selector matches this element?
    <p class="box" id="top">Hello</p>     (a) #intro (b) p (c) .star (d) h1
  27. 27.🎯 Which element does the selector .note style? (a) <h1 class="note"> (b) <h2 class="red"> (c) <h1 class="big"> (d) <h1 id="note">
  28. 28.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
  29. 29.True or false: .card is an id selector. (a) True (b) False
  30. 30.True or false: body is an id selector. (a) True (b) False
  31. 31.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
  32. 32.🎯 Which element does the selector .star style? (a) <h2 class="note"> (b) <h1 class="menu"> (c) <h1 id="star"> (d) <h1 class="star">
  33. 33.True or false: #end is a class selector. (a) False (b) True
  34. 34.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
  35. 35.True or false: li is an id selector. (a) True (b) False
  36. 36.True or false: #top is an id selector. (a) True (b) False
  37. 37.🎯 Which element does the selector #top style? (a) <p class="top"> (b) <p id="intro"> (c) <h1 class="box"> (d) <p id="top">
  38. 38.🎯 Which element does the selector li style? (a) <p id="intro"> (b) <li class="big"> (c) <div> (d) <span class="big">
  39. 39.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p>     (a) .menu (b) p (c) h1 (d) #star
  40. 40.True or false: li is a class selector. (a) True (b) False

Answer key

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

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