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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 536 · 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.🎯 Can many elements share the same class? (a) No (b) Yes
  2. 2.True or false: .big is an element selector. (a) True (b) False
  3. 3.True or false: .card is an id selector. (a) False (b) True
  4. 4.True or false: p is an id selector. (a) True (b) False
  5. 5.🎯 Which element does the selector .red style? (a) <li class="box"> (b) <div class="star"> (c) <li class="red"> (d) <li id="red">
  6. 6.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
  7. 7.🎯 Which CSS selector matches this element?
    <span class="red" id="main">Hello</span>     (a) #main (b) p (c) .box (d) #red
  8. 8.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
  9. 9.🎯 Which element does the selector .menu style? (a) <li id="menu"> (b) <div class="big"> (c) <li class="menu"> (d) <li class="note">
  10. 10.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
  11. 11.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div>     (a) span (b) #menu (c) .intro (d) div
  12. 12.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) 1 (d) any number
  13. 13.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
  14. 14.True or false: #top is an element selector. (a) False (b) True
  15. 15.True or false: #main is an element selector. (a) False (b) True
  16. 16.🎯 Which sign starts a class selector? (a) . (b) & (c) @ (d) #
  17. 17.🎯 Which sign starts an id selector? (a) . (b) & (c) # (d) @
  18. 18.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
  19. 19.🎯 Which CSS selector matches this element?
    <span class="menu" id="logo">Hello</span>     (a) p (b) #logo (c) #end (d) .logo
  20. 20.🎯 Which CSS selector matches this element?
    <li class="red" id="top">Hello</li>     (a) div (b) #red (c) #top (d) .top
  21. 21.🎯 Which CSS selector matches this element?
    <p class="note" id="end">Hello</p>     (a) .end (b) .big (c) #note (d) p
  22. 22.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
  23. 23.True or false: h1 is an element selector. (a) False (b) True
  24. 24.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
  25. 25.True or false: .menu is an id selector. (a) True (b) False
  26. 26.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li>     (a) #main (b) div (c) .star (d) .main
  27. 27.🎯 Which element does the selector #hero style? (a) <div id="top"> (b) <div class="hero"> (c) <div id="hero"> (d) <span class="box">
  28. 28.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1>     (a) .top (b) #intro (c) .star (d) .box
  29. 29.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
  30. 30.🎯 What kind of selector is .card? (a) a class selector (b) an element selector (c) an id selector
  31. 31.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
  32. 32.True or false: .big is a class selector. (a) False (b) True
  33. 33.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1>     (a) .menu (b) #main (c) #intro (d) #star
  34. 34.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <h1 class="red"> (c) <p class="logo"> (d) <p id="logo">
  35. 35.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1>     (a) .red (b) #big (c) .end (d) .big
  36. 36.True or false: #logo is an id selector. (a) False (b) True
  37. 37.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector
  38. 38.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2>     (a) h2 (b) .menu (c) #star (d) .logo
  39. 39.🎯 Which CSS selector matches this element?
    <h1 class="box" id="logo">Hello</h1>     (a) h2 (b) .logo (c) .star (d) .box
  40. 40.🎯 Which element does the selector .menu style? (a) <h2 class="note"> (b) <li class="big"> (c) <h2 id="menu"> (d) <h2 class="menu">

Answer key

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

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