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CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 270 · 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.True or false: li is an element selector. (a) False (b) True
  2. 2.🎯 Which sign starts an id selector? (a) # (b) & (c) @ (d) .
  3. 3.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
  4. 4.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p>     (a) h1 (b) p (c) #intro (d) .menu
  5. 5.🎯 Can many elements share the same class? (a) Yes (b) No
  6. 6.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
  7. 7.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
  8. 8.🎯 Which element does the selector div style? (a) <h1 id="intro"> (b) <p class="menu"> (c) <span> (d) <div class="menu">
  9. 9.🎯 What kind of selector is .star? (a) a class selector (b) an id selector (c) an element selector
  10. 10.🎯 Which element does the selector li style? (a) <span class="red"> (b) <li class="red"> (c) <p id="intro"> (d) <div>
  11. 11.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1>     (a) .menu (b) .note (c) #main (d) #menu
  12. 12.🎯 Which CSS selector matches this element?
    <div class="box" id="intro">Hello</div>     (a) .intro (b) .star (c) #main (d) #intro
  13. 13.True or false: #hero is an id selector. (a) True (b) False
  14. 14.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h1 id="red"> (c) <h2 class="star"> (d) <h1 class="box">
  15. 15.🎯 Which CSS selector matches this element?
    <h1 class="red" id="hero">Hello</h1>     (a) #red (b) .hero (c) #hero (d) #top
  16. 16.🎯 Which CSS selector matches this element?
    <p class="box" id="logo">Hello</p>     (a) #box (b) .logo (c) #end (d) .box
  17. 17.🎯 What kind of selector is img? (a) an id selector (b) a class selector (c) an element selector
  18. 18.🎯 What kind of selector is .card? (a) an id selector (b) a class selector (c) an element selector
  19. 19.🎯 Which element does the selector #end style? (a) <li id="hero"> (b) <li id="end"> (c) <div class="big"> (d) <li class="end">
  20. 20.True or false: body is an element selector. (a) True (b) False
  21. 21.🎯 Which sign starts a class selector? (a) & (b) . (c) @ (d) #
  22. 22.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li>     (a) #big (b) #hero (c) #top (d) .red
  23. 23.True or false: .card is an element selector. (a) False (b) True
  24. 24.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
  25. 25.True or false: .menu is a class selector. (a) False (b) True
  26. 26.🎯 Which element does the selector #main style? (a) <h2 class="main"> (b) <h2 id="main"> (c) <li class="big"> (d) <h2 id="logo">
  27. 27.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
  28. 28.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
  29. 29.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1>     (a) #intro (b) .big (c) h2 (d) .intro
  30. 30.🎯 Which element does the selector .red style? (a) <span class="red"> (b) <p class="star"> (c) <span class="box"> (d) <span id="red">
  31. 31.True or false: #top is an id selector. (a) True (b) False
  32. 32.🎯 Which CSS selector matches this element?
    <h1 class="red" id="main">Hello</h1>     (a) h1 (b) .box (c) #logo (d) .main
  33. 33.True or false: #logo is an id selector. (a) False (b) True
  34. 34.🎯 Which element does the selector p style? (a) <h2 class="red"> (b) <li id="top"> (c) <p class="red"> (d) <h1>
  35. 35.🎯 Which CSS selector matches this element?
    <span class="note" id="main">Hello</span>     (a) #main (b) #note (c) .main (d) #logo
  36. 36.True or false: .note is an id selector. (a) False (b) True
  37. 37.🎯 Which element does the selector #hero style? (a) <li class="hero"> (b) <li id="hero"> (c) <div class="note"> (d) <li id="top">
  38. 38.True or false: h1 is a class selector. (a) True (b) False
  39. 39.🎯 Which element does the selector div style? (a) <h1 id="intro"> (b) <p class="star"> (c) <div class="star"> (d) <span>
  40. 40.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div>     (a) #main (b) .note (c) div (d) .intro

Answer key

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

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