CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 558 · 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.True or false: #hero is an element selector. (a) False (b) True
2. 2.True or false: .note is a class selector. (a) False (b) True
3. 3.True or false: img is a class selector. (a) False (b) True
4. 4.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="main">Hello</h2> (a) #menu (b) .menu (c) .note (d) .main
5. 5.True or false: body is an element selector. (a) True (b) False
6. 6.🎯 Which element does the selector .box style? (a) <div class="box"> (b) <div class="star"> (c) <span class="menu"> (d) <div id="box">
7. 7.🎯 Which sign starts a class selector? (a) & (b) # (c) @ (d) .
8. 8.🎯 Which CSS selector matches this element?
   <li class="big" id="intro">Hello</li> (a) .red (b) #intro (c) #main (d) .intro
9. 9.🎯 Which CSS selector matches this element?
   <div class="red" id="top">Hello</div> (a) #red (b) #intro (c) span (d) #top
10. 10.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="hero"> (c) <li class="note"> (d) <h1 class="note">
11. 11.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h2 class="star"> (c) <h1 id="red"> (d) <h1 class="box">
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) .big (b) #intro (c) h2 (d) #main
13. 13.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 5 (d) 1
14. 14.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) #main (b) #note (c) .big (d) #intro
15. 15.🎯 Which sign starts an id selector? (a) @ (b) . (c) & (d) #
16. 16.🎯 Which CSS selector matches this element?
    <li class="box" id="top">Hello</li> (a) div (b) #box (c) .star (d) #top
17. 17.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
18. 18.🎯 Which CSS selector matches this element?
    <h2 class="big" id="logo">Hello</h2> (a) li (b) #big (c) .big (d) .red
19. 19.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li> (a) .logo (b) #logo (c) .note (d) #menu
20. 20.True or false: .star is an id selector. (a) True (b) False
21. 21.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) #big (b) p (c) .red (d) span
22. 22.🎯 Which element does the selector .big style? (a) <h1 class="big"> (b) <h2 class="box"> (c) <h1 class="red"> (d) <h1 id="big">
23. 23.True or false: li is an id selector. (a) False (b) True
24. 24.True or false: li is a class selector. (a) False (b) True
25. 25.True or false: li is an element selector. (a) False (b) True
26. 26.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .main (b) #main (c) .star (d) h1
27. 27.True or false: #top is a class selector. (a) True (b) False
28. 28.True or false: #hero is an id selector. (a) True (b) False
29. 29.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p> (a) #main (b) .menu (c) #star (d) p
30. 30.🎯 Which CSS selector matches this element?
    <p class="big" id="main">Hello</p> (a) #big (b) .red (c) #logo (d) p
31. 31.🎯 Can many elements share the same class? (a) Yes (b) No
32. 32.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
33. 33.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
34. 34.🎯 What kind of selector is img? (a) an element selector (b) a class selector (c) an id selector
35. 35.True or false: p is an id selector. (a) False (b) True
36. 36.🎯 Which element does the selector #intro style? (a) <li id="main"> (b) <li id="intro"> (c) <div class="star"> (d) <li class="intro">
37. 37.True or false: .menu is a class selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) .top (b) #top (c) #intro (d) #big
39. 39.True or false: .card is an element selector. (a) True (b) False
40. 40.🎯 What kind of selector is #hero? (a) a class selector (b) an id selector (c) an element selector

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