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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 538 · 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 an id selector? (a) @ (b) # (c) . (d) &
  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: body is an id selector. (a) False (b) True
  4. 4.🎯 Can many elements share the same class? (a) No (b) Yes
  5. 5.🎯 Which CSS selector matches this element?
    <h1 class="note" id="hero">Hello</h1>     (a) .note (b) #top (c) .big (d) #note
  6. 6.🎯 Which CSS selector matches this element?
    <li class="big" id="top">Hello</li>     (a) #big (b) .top (c) #intro (d) .big
  7. 7.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
  8. 8.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
  9. 9.True or false: body is an element selector. (a) True (b) False
  10. 10.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p>     (a) h1 (b) p (c) .red (d) .top
  11. 11.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
  12. 12.🎯 Which element does the selector #main style? (a) <li class="star"> (b) <h2 class="main"> (c) <h2 id="main"> (d) <h2 id="logo">
  13. 13.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
  14. 14.True or false: #end is a class selector. (a) False (b) True
  15. 15.True or false: #top is a class selector. (a) False (b) True
  16. 16.True or false: #main is an element selector. (a) True (b) False
  17. 17.🎯 Which element does the selector .star style? (a) <p id="star"> (b) <p class="menu"> (c) <p class="star"> (d) <h1 class="note">
  18. 18.True or false: img is an id selector. (a) False (b) True
  19. 19.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p>     (a) h1 (b) p (c) .box (d) #red
  20. 20.🎯 Which element does the selector h2 style? (a) <h2 class="red"> (b) <div class="red"> (c) <span id="end"> (d) <li>
  21. 21.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
  22. 22.🎯 Which element does the selector p style? (a) <li id="hero"> (b) <p class="note"> (c) <h2 class="note"> (d) <h1>
  23. 23.🎯 Which sign starts a class selector? (a) & (b) . (c) # (d) @
  24. 24.True or false: .note is a class selector. (a) True (b) False
  25. 25.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1>     (a) h1 (b) #note (c) #main (d) h2
  26. 26.🎯 Which element does the selector #end style? (a) <p class="box"> (b) <span class="end"> (c) <span id="end"> (d) <span id="hero">
  27. 27.🎯 Which CSS selector matches this element?
    <div class="box" id="logo">Hello</div>     (a) #box (b) .logo (c) .box (d) #end
  28. 28.True or false: img is an element selector. (a) False (b) True
  29. 29.🎯 Which CSS selector matches this element?
    <li class="red" id="intro">Hello</li>     (a) .box (b) #red (c) #main (d) #intro
  30. 30.🎯 Which element does the selector span style? (a) <h1 class="box"> (b) <span class="box"> (c) <p> (d) <h2 id="intro">
  31. 31.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2>     (a) #big (b) li (c) h2 (d) #logo
  32. 32.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1>     (a) h1 (b) .menu (c) .logo (d) #end
  33. 33.True or false: #hero is a class selector. (a) True (b) False
  34. 34.🎯 Which element does the selector span style? (a) <h1 class="red"> (b) <h2 id="logo"> (c) <p> (d) <span class="red">
  35. 35.🎯 Which element does the selector div style? (a) <h1 id="top"> (b) <p class="red"> (c) <span> (d) <div class="red">
  36. 36.🎯 Which element does the selector #main style? (a) <p id="main"> (b) <h1 class="big"> (c) <p id="logo"> (d) <p class="main">
  37. 37.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
  38. 38.🎯 Which CSS selector matches this element?
    <p class="box" id="top">Hello</p>     (a) #intro (b) .box (c) h1 (d) .top
  39. 39.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <li class="box"> (c) <h2 class="top"> (d) <h2 id="top">
  40. 40.🎯 Which element does the selector p style? (a) <h1> (b) <li id="logo"> (c) <h2 class="big"> (d) <p class="big">

Answer key

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

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