CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 445 · 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.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
2. 2.🎯 Which element does the selector h1 style? (a) <div id="end"> (b) <li class="big"> (c) <h1 class="big"> (d) <h2>
3. 3.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
4. 4.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
5. 5.🎯 Which element does the selector h2 style? (a) <li> (b) <span id="intro"> (c) <div class="big"> (d) <h2 class="big">
6. 6.🎯 Which CSS selector matches this element?
   <span class="big" id="intro">Hello</span> (a) #big (b) .red (c) #main (d) span
7. 7.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
8. 8.🎯 Which sign starts an id selector? (a) @ (b) & (c) . (d) #
9. 9.True or false: #main is an element selector. (a) True (b) False
10. 10.🎯 Which sign starts a class selector? (a) . (b) @ (c) # (d) &
11. 11.🎯 Which CSS selector matches this element?
    <div class="box" id="end">Hello</div> (a) div (b) #hero (c) .end (d) .star
12. 12.🎯 Which CSS selector matches this element?
    <li class="red" id="main">Hello</li> (a) div (b) #main (c) .box (d) #red
13. 13.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="intro"> (c) <span class="note"> (d) <h1 class="note">
14. 14.True or false: .big is an id selector. (a) False (b) True
15. 15.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p> (a) .star (b) h1 (c) #star (d) .menu
16. 16.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
17. 17.🎯 How many elements on a page should have the same id? (a) 5 (b) 1 (c) 2 (d) any number
18. 18.True or false: #hero is an id selector. (a) True (b) False
19. 19.🎯 Which element does the selector h1 style? (a) <li class="red"> (b) <h1 class="red"> (c) <div id="top"> (d) <h2>
20. 20.True or false: #top is an id selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) #main (b) .box (c) .intro (d) #intro
22. 22.True or false: body is an id selector. (a) True (b) False
23. 23.🎯 What kind of selector is body? (a) a class selector (b) an id selector (c) an element selector
24. 24.🎯 Can many elements share the same class? (a) Yes (b) No
25. 25.True or false: li is an element selector. (a) False (b) True
26. 26.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) p (b) #big (c) .big (d) .red
27. 27.🎯 Which element does the selector div style? (a) <h1 id="end"> (b) <p class="star"> (c) <span> (d) <div class="star">
28. 28.🎯 Which element does the selector .note style? (a) <h1 class="red"> (b) <p class="note"> (c) <p id="note"> (d) <p class="big">
29. 29.🎯 Which CSS selector matches this element?
    <div class="box" id="main">Hello</div> (a) #box (b) div (c) .main (d) .star
30. 30.🎯 Which element does the selector h1 style? (a) <li class="star"> (b) <h1 class="star"> (c) <div id="main"> (d) <h2>
31. 31.🎯 Which element does the selector #logo style? (a) <p class="logo"> (b) <h1 class="box"> (c) <p id="logo"> (d) <p id="end">
32. 32.True or false: body is an element selector. (a) False (b) True
33. 33.🎯 Which element does the selector p style? (a) <h2 class="star"> (b) <h1> (c) <p class="star"> (d) <li id="main">
34. 34.True or false: #logo is a class selector. (a) False (b) True
35. 35.🎯 Which element does the selector #hero style? (a) <div class="menu"> (b) <li id="top"> (c) <li id="hero"> (d) <li class="hero">
36. 36.🎯 Which CSS selector matches this element?
    <span class="red" id="top">Hello</span> (a) .top (b) #intro (c) .box (d) .red
37. 37.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) #top (b) #hero (c) .hero (d) #note
38. 38.🎯 What kind of selector is .big? (a) a class selector (b) an id selector (c) an element selector
39. 39.True or false: .big is a class selector. (a) True (b) False
40. 40.True or false: #main is a class selector. (a) False (b) True

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