CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 640 · 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 CSS selector matches this element?
   <h1 class="star" id="top">Hello</h1> (a) .top (b) #intro (c) #star (d) h1
2. 2.True or false: #hero is a class selector. (a) False (b) True
3. 3.🎯 Which element does the selector div style? (a) <h1 id="top"> (b) <p class="box"> (c) <span> (d) <div class="box">
4. 4.🎯 Which sign starts a class selector? (a) @ (b) & (c) # (d) .
5. 5.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
6. 6.True or false: .star is a class selector. (a) False (b) True
7. 7.True or false: .menu is an element selector. (a) False (b) True
8. 8.🎯 Which CSS selector matches this element?
   <div class="red" id="hero">Hello</div> (a) .hero (b) .box (c) #red (d) div
9. 9.🎯 Which element does the selector p style? (a) <h1> (b) <li id="end"> (c) <p class="red"> (d) <h2 class="red">
10. 10.True or false: img is an element selector. (a) True (b) False
11. 11.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
12. 12.🎯 What kind of selector is h1? (a) an element selector (b) a class selector (c) an id selector
13. 13.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
14. 14.🎯 Which sign starts an id selector? (a) @ (b) & (c) . (d) #
15. 15.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
16. 16.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
17. 17.🎯 Which element does the selector .note style? (a) <h2 class="note"> (b) <h2 id="note"> (c) <h2 class="big"> (d) <li class="red">
18. 18.🎯 Which element does the selector #end style? (a) <h2 class="end"> (b) <h2 id="hero"> (c) <h2 id="end"> (d) <li class="menu">
19. 19.🎯 Which element does the selector .star style? (a) <h2 id="star"> (b) <h2 class="menu"> (c) <h2 class="star"> (d) <li class="note">
20. 20.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
21. 21.🎯 Which element does the selector #intro style? (a) <li id="intro"> (b) <li id="main"> (c) <li class="intro"> (d) <div class="menu">
22. 22.🎯 Can many elements share the same class? (a) Yes (b) No
23. 23.🎯 Which CSS selector matches this element?
    <div class="note" id="end">Hello</div> (a) .note (b) span (c) #note (d) .end
24. 24.🎯 Which element does the selector .big style? (a) <p class="red"> (b) <p id="big"> (c) <h1 class="box"> (d) <p class="big">
25. 25.🎯 Which CSS selector matches this element?
    <p class="big" id="main">Hello</p> (a) .red (b) .big (c) .main (d) h1
26. 26.True or false: body is a class selector. (a) True (b) False
27. 27.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
28. 28.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) .top (b) p (c) .red (d) h1
29. 29.🎯 Which element does the selector h1 style? (a) <h2> (b) <li class="star"> (c) <div id="logo"> (d) <h1 class="star">
30. 30.🎯 Which element does the selector .red style? (a) <div class="star"> (b) <li id="red"> (c) <li class="red"> (d) <li class="box">
31. 31.True or false: li is an element selector. (a) False (b) True
32. 32.🎯 Which element does the selector #top style? (a) <div id="intro"> (b) <div class="top"> (c) <div id="top"> (d) <span class="note">
33. 33.🎯 Which element does the selector li style? (a) <p id="hero"> (b) <li class="menu"> (c) <div> (d) <span class="menu">
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1> (a) .note (b) #menu (c) h1 (d) #intro
35. 35.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p> (a) .red (b) #red (c) .top (d) h1
36. 36.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
37. 37.🎯 Which element does the selector h2 style? (a) <div class="star"> (b) <span id="end"> (c) <h2 class="star"> (d) <li>
38. 38.True or false: #logo is an id selector. (a) False (b) True
39. 39.🎯 Which CSS selector matches this element?
    <div class="note" id="hero">Hello</div> (a) #note (b) span (c) .hero (d) #hero
40. 40.True or false: .note is an id selector. (a) False (b) True

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