CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 391 · 40 questions

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.

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

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