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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 596 · 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.🎯 What kind of selector is #logo? (a) an id selector (b) a class selector (c) an element selector
  2. 2.True or false: .note is a class selector. (a) True (b) False
  3. 3.🎯 Which element does the selector .big style? (a) <li class="box"> (b) <h2 id="big"> (c) <h2 class="red"> (d) <h2 class="big">
  4. 4.🎯 Which CSS selector matches this element?
    <span class="box" id="hero">Hello</span>     (a) .hero (b) .star (c) span (d) p
  5. 5.🎯 Which sign starts an id selector? (a) # (b) & (c) . (d) @
  6. 6.🎯 Which sign starts a class selector? (a) & (b) @ (c) . (d) #
  7. 7.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
  8. 8.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1>     (a) h2 (b) #note (c) #intro (d) h1
  9. 9.True or false: #main is a class selector. (a) True (b) False
  10. 10.🎯 Which element does the selector #intro style? (a) <h1 class="intro"> (b) <h1 id="main"> (c) <h2 class="red"> (d) <h1 id="intro">
  11. 11.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
  12. 12.True or false: #logo is an id selector. (a) False (b) True
  13. 13.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="end">Hello</h1>     (a) #hero (b) .end (c) #menu (d) h1
  14. 14.🎯 Which element does the selector .note style? (a) <li class="red"> (b) <h2 id="note"> (c) <h2 class="note"> (d) <h2 class="big">
  15. 15.True or false: .card is a class selector. (a) False (b) True
  16. 16.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
  17. 17.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span>     (a) span (b) .star (c) #main (d) p
  18. 18.🎯 Which element does the selector #main style? (a) <p class="main"> (b) <h1 class="note"> (c) <p id="logo"> (d) <p id="main">
  19. 19.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span>     (a) .star (b) #main (c) #box (d) .main
  20. 20.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1>     (a) #end (b) #star (c) .logo (d) .star
  21. 21.🎯 Which element does the selector #intro style? (a) <div class="big"> (b) <li id="main"> (c) <li class="intro"> (d) <li id="intro">
  22. 22.🎯 Which element does the selector p style? (a) <h2 class="big"> (b) <h1> (c) <li id="end"> (d) <p class="big">
  23. 23.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
  24. 24.True or false: img is an element selector. (a) False (b) True
  25. 25.🎯 Which element does the selector #hero style? (a) <li id="top"> (b) <li class="hero"> (c) <div class="star"> (d) <li id="hero">
  26. 26.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2>     (a) #top (b) .hero (c) #note (d) #hero
  27. 27.🎯 Can many elements share the same class? (a) Yes (b) No
  28. 28.🎯 Which element does the selector li style? (a) <p id="main"> (b) <span class="box"> (c) <div> (d) <li class="box">
  29. 29.🎯 Which element does the selector #logo style? (a) <li id="end"> (b) <li class="logo"> (c) <li id="logo"> (d) <div class="menu">
  30. 30.True or false: body is an id selector. (a) False (b) True
  31. 31.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
  32. 32.True or false: .menu is an element selector. (a) True (b) False
  33. 33.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
  34. 34.True or false: .big is a class selector. (a) False (b) True
  35. 35.🎯 What kind of selector is p? (a) an element selector (b) a class selector (c) an id selector
  36. 36.🎯 How many elements on a page should have the same id? (a) 2 (b) 1 (c) 5 (d) any number
  37. 37.🎯 What kind of selector is h1? (a) a class selector (b) an element selector (c) an id selector
  38. 38.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span>     (a) span (b) .top (c) #intro (d) .star
  39. 39.True or false: #top is a class selector. (a) False (b) True
  40. 40.True or false: .menu is a class selector. (a) True (b) False

Answer key

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

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