CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 304 · 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 #hero? (a) an element selector (b) a class selector (c) an id selector
2. 2.🎯 How many elements on a page should have the same id? (a) any number (b) 5 (c) 1 (d) 2
3. 3.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
4. 4.🎯 Which element does the selector li style? (a) <span class="menu"> (b) <p id="top"> (c) <li class="menu"> (d) <div>
5. 5.🎯 Which sign starts an id selector? (a) . (b) & (c) @ (d) #
6. 6.🎯 Which element does the selector #top style? (a) <p id="top"> (b) <h1 class="big"> (c) <p id="intro"> (d) <p class="top">
7. 7.🎯 Can many elements share the same class? (a) Yes (b) No
8. 8.🎯 Which CSS selector matches this element?
   <h2 class="note" id="intro">Hello</h2> (a) #note (b) #main (c) h2 (d) li
9. 9.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
10. 10.🎯 Which element does the selector h1 style? (a) <h2> (b) <li class="note"> (c) <h1 class="note"> (d) <div id="logo">
11. 11.True or false: .menu is an element selector. (a) False (b) True
12. 12.True or false: .note is a class selector. (a) True (b) False
13. 13.🎯 Which CSS selector matches this element?
    <p class="red" id="hero">Hello</p> (a) .red (b) #red (c) .hero (d) h1
14. 14.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
15. 15.🎯 Which CSS selector matches this element?
    <h1 class="note" id="main">Hello</h1> (a) .note (b) h2 (c) .main (d) #note
16. 16.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="intro">Hello</h2> (a) li (b) .note (c) #menu (d) #intro
17. 17.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <li class="big"> (c) <h2 id="top"> (d) <h2 class="top">
18. 18.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
19. 19.🎯 Which element does the selector p style? (a) <li id="main"> (b) <h2 class="note"> (c) <p class="note"> (d) <h1>
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="red" id="intro">Hello</h1> (a) .box (b) #intro (c) #red (d) .intro
21. 21.🎯 Which element does the selector .red style? (a) <p class="star"> (b) <span id="red"> (c) <span class="red"> (d) <span class="box">
22. 22.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
23. 23.🎯 Which CSS selector matches this element?
    <li class="note" id="top">Hello</li> (a) .note (b) div (c) #note (d) .top
24. 24.True or false: h1 is an id selector. (a) False (b) True
25. 25.True or false: .star is a class selector. (a) True (b) False
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) #end (b) h2 (c) .star (d) #star
27. 27.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
28. 28.🎯 Which element does the selector h2 style? (a) <div class="red"> (b) <h2 class="red"> (c) <span id="intro"> (d) <li>
29. 29.True or false: #hero is an id selector. (a) False (b) True
30. 30.🎯 Which sign starts a class selector? (a) & (b) . (c) @ (d) #
31. 31.🎯 Which CSS selector matches this element?
    <div class="star" id="main">Hello</div> (a) .main (b) span (c) .menu (d) div
32. 32.🎯 Which element does the selector .box style? (a) <p id="box"> (b) <h1 class="menu"> (c) <p class="star"> (d) <p class="box">
33. 33.True or false: h1 is an element selector. (a) True (b) False
34. 34.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) .end (b) .menu (c) #end (d) #star
35. 35.🎯 Which element does the selector .red style? (a) <h2 id="red"> (b) <h2 class="box"> (c) <li class="star"> (d) <h2 class="red">
36. 36.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) .red (b) .top (c) #big (d) .big
37. 37.🎯 Which CSS selector matches this element?
    <span class="red" id="top">Hello</span> (a) .top (b) .red (c) #intro (d) #red
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="big" id="main">Hello</h1> (a) .main (b) #big (c) h2 (d) #main
39. 39.True or false: .star is an element selector. (a) False (b) True
40. 40.🎯 Which element does the selector p style? (a) <h1> (b) <h2 class="big"> (c) <li id="logo"> (d) <p class="big">

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