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CSS Worksheet: Selectors Class and Id

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

Answer key

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

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