CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 172 · 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 a class selector? (a) . (b) @ (c) & (d) #
2. 2.🎯 Which element does the selector #top style? (a) <li class="top"> (b) <div class="big"> (c) <li id="top"> (d) <li id="intro">
3. 3.True or false: .note is an element selector. (a) True (b) False
4. 4.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
5. 5.True or false: .card is a class selector. (a) False (b) True
6. 6.🎯 Which element does the selector .note style? (a) <p id="note"> (b) <p class="big"> (c) <h1 class="red"> (d) <p class="note">
7. 7.🎯 Which CSS selector matches this element?
   <p class="note" id="top">Hello</p> (a) .note (b) h1 (c) #note (d) .top
8. 8.🎯 What kind of selector is #top? (a) an element selector (b) an id selector (c) a class selector
9. 9.True or false: .menu is a class selector. (a) False (b) True
10. 10.🎯 Which CSS selector matches this element?
    <h2 class="big" id="end">Hello</h2> (a) .end (b) .red (c) .big (d) #hero
11. 11.🎯 Which element does the selector #intro style? (a) <li class="intro"> (b) <li id="intro"> (c) <li id="main"> (d) <div class="star">
12. 12.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) p (b) .red (c) .top (d) span
13. 13.🎯 Which CSS selector matches this element?
    <h2 class="red" id="top">Hello</h2> (a) #intro (b) .red (c) li (d) #red
14. 14.🎯 Which CSS selector matches this element?
    <li class="red" id="top">Hello</li> (a) #red (b) .box (c) div (d) li
15. 15.🎯 Which CSS selector matches this element?
    <p class="note" id="logo">Hello</p> (a) .logo (b) h1 (c) #end (d) p
16. 16.🎯 Which CSS selector matches this element?
    <li class="red" id="intro">Hello</li> (a) .box (b) .red (c) div (d) #red
17. 17.🎯 Which sign starts an id selector? (a) . (b) # (c) @ (d) &
18. 18.🎯 Can many elements share the same class? (a) No (b) Yes
19. 19.True or false: #top is a class selector. (a) False (b) True
20. 20.True or false: body is an element selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <h1 class="note" id="hero">Hello</h1> (a) .big (b) #note (c) #hero (d) .hero
22. 22.True or false: #hero is an id selector. (a) True (b) False
23. 23.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
24. 24.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
25. 25.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
26. 26.🎯 What kind of selector is p? (a) an element selector (b) a class selector (c) an id selector
27. 27.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1> (a) #menu (b) h1 (c) .top (d) .note
28. 28.🎯 Which CSS selector matches this element?
    <h2 class="big" id="logo">Hello</h2> (a) #big (b) .big (c) .red (d) .logo
29. 29.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) .big (b) h1 (c) #top (d) #hero
30. 30.True or false: #main is a class selector. (a) True (b) False
31. 31.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
32. 32.True or false: #logo is an id selector. (a) True (b) False
33. 33.🎯 Which element does the selector h2 style? (a) <span id="end"> (b) <div class="menu"> (c) <li> (d) <h2 class="menu">
34. 34.🎯 Which element does the selector #hero style? (a) <h1 class="note"> (b) <p id="top"> (c) <p id="hero"> (d) <p class="hero">
35. 35.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) .big (b) h2 (c) #intro (d) h1
36. 36.🎯 Which element does the selector #intro style? (a) <p class="intro"> (b) <h1 class="big"> (c) <p id="intro"> (d) <p id="main">
37. 37.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
38. 38.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
39. 39.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector
40. 40.True or false: #end is a class selector. (a) False (b) True

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