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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 787 · 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.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
  2. 2.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span>     (a) #box (b) .box (c) .star (d) #intro
  3. 3.🎯 Which sign starts an id selector? (a) & (b) # (c) @ (d) .
  4. 4.True or false: .big is an id selector. (a) False (b) True
  5. 5.True or false: .big is a class selector. (a) False (b) True
  6. 6.🎯 What kind of selector is img? (a) an id selector (b) a class selector (c) an element selector
  7. 7.True or false: #logo is an element selector. (a) False (b) True
  8. 8.True or false: .star is an element selector. (a) True (b) False
  9. 9.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="box"> (c) <div class="menu"> (d) <li class="star">
  10. 10.True or false: #hero is an id selector. (a) False (b) True
  11. 11.True or false: .note is an id selector. (a) False (b) True
  12. 12.🎯 Which element does the selector h1 style? (a) <li class="big"> (b) <h1 class="big"> (c) <h2> (d) <div id="top">
  13. 13.🎯 Which element does the selector #logo style? (a) <div id="logo"> (b) <div id="end"> (c) <span class="note"> (d) <div class="logo">
  14. 14.True or false: #hero is a class selector. (a) False (b) True
  15. 15.🎯 Which element does the selector #hero style? (a) <p class="big"> (b) <span id="top"> (c) <span id="hero"> (d) <span class="hero">
  16. 16.True or false: #end is a class selector. (a) False (b) True
  17. 17.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p>     (a) .big (b) .red (c) h1 (d) #intro
  18. 18.🎯 Which CSS selector matches this element?
    <li class="menu" id="main">Hello</li>     (a) .menu (b) .main (c) .note (d) #menu
  19. 19.🎯 Which element does the selector #top style? (a) <p class="top"> (b) <p id="intro"> (c) <h1 class="note"> (d) <p id="top">
  20. 20.True or false: li is a class selector. (a) False (b) True
  21. 21.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
  22. 22.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
  23. 23.🎯 Which element does the selector h1 style? (a) <li class="menu"> (b) <h2> (c) <div id="intro"> (d) <h1 class="menu">
  24. 24.True or false: #main is an id selector. (a) True (b) False
  25. 25.🎯 Can many elements share the same class? (a) No (b) Yes
  26. 26.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
  27. 27.True or false: #end is an id selector. (a) True (b) False
  28. 28.True or false: .star is an id selector. (a) False (b) True
  29. 29.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="end">Hello</h1>     (a) #hero (b) h1 (c) .note (d) .end
  30. 30.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span>     (a) span (b) .menu (c) .end (d) #hero
  31. 31.True or false: #logo is a class selector. (a) True (b) False
  32. 32.🎯 Which element does the selector #intro style? (a) <p id="main"> (b) <p id="intro"> (c) <p class="intro"> (d) <h1 class="menu">
  33. 33.🎯 Which CSS selector matches this element?
    <span class="menu" id="logo">Hello</span>     (a) .logo (b) span (c) p (d) .note
  34. 34.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
  35. 35.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
  36. 36.🎯 Which CSS selector matches this element?
    <div class="box" id="end">Hello</div>     (a) div (b) #box (c) .end (d) .star
  37. 37.🎯 Which element does the selector #main style? (a) <li id="logo"> (b) <div class="big"> (c) <li class="main"> (d) <li id="main">
  38. 38.True or false: body is a class selector. (a) True (b) False
  39. 39.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
  40. 40.True or false: .note is a class selector. (a) False (b) True

Answer key

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

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