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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 201 · 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 CSS selector matches this element?
    <li class="red" id="end">Hello</li>     (a) div (b) #red (c) .red (d) .box
  2. 2.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
  3. 3.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
  4. 4.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
  5. 5.True or false: body is an id selector. (a) False (b) True
  6. 6.True or false: #main is a class selector. (a) False (b) True
  7. 7.True or false: h1 is an element selector. (a) True (b) False
  8. 8.🎯 Which CSS selector matches this element?
    <li class="box" id="logo">Hello</li>     (a) .logo (b) li (c) div (d) #box
  9. 9.🎯 Which sign starts a class selector? (a) & (b) . (c) @ (d) #
  10. 10.True or false: #hero is an id selector. (a) True (b) False
  11. 11.🎯 Which element does the selector #main style? (a) <span class="star"> (b) <div class="main"> (c) <div id="main"> (d) <div id="logo">
  12. 12.🎯 Which CSS selector matches this element?
    <span class="note" id="main">Hello</span>     (a) .main (b) #logo (c) .big (d) #main
  13. 13.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span>     (a) #end (b) #hero (c) .menu (d) #star
  14. 14.🎯 Which element does the selector .box style? (a) <li class="menu"> (b) <h2 class="star"> (c) <h2 class="box"> (d) <h2 id="box">
  15. 15.True or false: .card is a class selector. (a) True (b) False
  16. 16.🎯 Which element does the selector #top style? (a) <div class="top"> (b) <div id="top"> (c) <span class="note"> (d) <div id="intro">
  17. 17.🎯 What kind of selector is #hero? (a) an element selector (b) a class selector (c) an id selector
  18. 18.🎯 Which CSS selector matches this element?
    <h2 class="star" id="main">Hello</h2>     (a) .main (b) li (c) .star (d) #logo
  19. 19.🎯 What kind of selector is p? (a) a class selector (b) an element selector (c) an id selector
  20. 20.🎯 Which CSS selector matches this element?
    <p class="box" id="intro">Hello</p>     (a) #box (b) .intro (c) .star (d) p
  21. 21.🎯 Which CSS selector matches this element?
    <li class="box" id="intro">Hello</li>     (a) #box (b) .box (c) div (d) .star
  22. 22.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
  23. 23.True or false: li is an element selector. (a) True (b) False
  24. 24.🎯 Which CSS selector matches this element?
    <p class="menu" id="hero">Hello</p>     (a) #hero (b) #menu (c) .hero (d) .note
  25. 25.🎯 Which element does the selector div style? (a) <p class="note"> (b) <span> (c) <h1 id="intro"> (d) <div class="note">
  26. 26.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
  27. 27.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span>     (a) p (b) .star (c) span (d) #intro
  28. 28.🎯 What kind of selector is img? (a) an element selector (b) a class selector (c) an id selector
  29. 29.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
  30. 30.🎯 Which element does the selector #hero style? (a) <p class="hero"> (b) <h1 class="note"> (c) <p id="top"> (d) <p id="hero">
  31. 31.True or false: li is a class selector. (a) False (b) True
  32. 32.🎯 Which element does the selector #top style? (a) <div class="red"> (b) <li id="intro"> (c) <li class="top"> (d) <li id="top">
  33. 33.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2>     (a) #hero (b) li (c) h2 (d) .end
  34. 34.🎯 What kind of selector is #top? (a) an element selector (b) an id selector (c) a class selector
  35. 35.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
  36. 36.🎯 Which element does the selector #intro style? (a) <li class="intro"> (b) <li id="main"> (c) <div class="big"> (d) <li id="intro">
  37. 37.🎯 Which element does the selector .red style? (a) <li class="red"> (b) <li class="box"> (c) <li id="red"> (d) <div class="star">
  38. 38.🎯 Which element does the selector #intro style? (a) <h1 id="main"> (b) <h1 class="intro"> (c) <h2 class="big"> (d) <h1 id="intro">
  39. 39.True or false: #top is a class selector. (a) False (b) True
  40. 40.True or false: .note is a class selector. (a) True (b) False

Answer key

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

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