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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 402 · 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 a class selector? (a) . (b) @ (c) & (d) #
  2. 2.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
  3. 3.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
  4. 4.True or false: #main is a class selector. (a) True (b) False
  5. 5.🎯 Which CSS selector matches this element?
    <h2 class="red" id="end">Hello</h2>     (a) #red (b) .end (c) h2 (d) .box
  6. 6.True or false: h1 is a class selector. (a) False (b) True
  7. 7.True or false: .big is a class selector. (a) False (b) True
  8. 8.🎯 Can many elements share the same class? (a) No (b) Yes
  9. 9.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
  10. 10.True or false: .menu is an id selector. (a) True (b) False
  11. 11.🎯 Which element does the selector div style? (a) <div class="star"> (b) <span> (c) <p class="star"> (d) <h1 id="top">
  12. 12.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
  13. 13.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
  14. 14.True or false: .card is an element selector. (a) True (b) False
  15. 15.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
  16. 16.🎯 What kind of selector is #main? (a) an element selector (b) a class selector (c) an id selector
  17. 17.True or false: .card is a class selector. (a) False (b) True
  18. 18.🎯 Which element does the selector #intro style? (a) <li id="main"> (b) <li id="intro"> (c) <div class="menu"> (d) <li class="intro">
  19. 19.True or false: #main is an element selector. (a) True (b) False
  20. 20.True or false: img is an element selector. (a) False (b) True
  21. 21.True or false: .big is an element selector. (a) True (b) False
  22. 22.🎯 Which element does the selector #intro style? (a) <h1 id="main"> (b) <h1 class="intro"> (c) <h2 class="box"> (d) <h1 id="intro">
  23. 23.🎯 Which CSS selector matches this element?
    <li class="note" id="main">Hello</li>     (a) #main (b) div (c) #note (d) .main
  24. 24.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li>     (a) .box (b) .star (c) div (d) #logo
  25. 25.🎯 Which element does the selector h2 style? (a) <li> (b) <div class="star"> (c) <h2 class="star"> (d) <span id="hero">
  26. 26.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
  27. 27.🎯 Which element does the selector span style? (a) <span class="menu"> (b) <h1 class="menu"> (c) <p> (d) <h2 id="main">
  28. 28.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) 1 (d) any number
  29. 29.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p>     (a) h1 (b) .big (c) #top (d) #big
  30. 30.🎯 Which element does the selector .menu style? (a) <li class="note"> (b) <li id="menu"> (c) <li class="menu"> (d) <div class="big">
  31. 31.🎯 Which element does the selector p style? (a) <li id="intro"> (b) <h2 class="big"> (c) <p class="big"> (d) <h1>
  32. 32.🎯 Which element does the selector h2 style? (a) <li> (b) <div class="big"> (c) <h2 class="big"> (d) <span id="hero">
  33. 33.True or false: #end is an element selector. (a) False (b) True
  34. 34.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
  35. 35.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2>     (a) #hero (b) .hero (c) #top (d) li
  36. 36.True or false: h1 is an element selector. (a) True (b) False
  37. 37.True or false: #main is an id selector. (a) True (b) False
  38. 38.🎯 Which element does the selector h1 style? (a) <h2> (b) <li class="big"> (c) <div id="main"> (d) <h1 class="big">
  39. 39.True or false: #logo is an id selector. (a) False (b) True
  40. 40.🎯 Which element does the selector h1 style? (a) <h1 class="star"> (b) <li class="star"> (c) <h2> (d) <div id="logo">

Answer key

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

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