CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 400 · 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.🎯 Can many elements share the same class? (a) No (b) Yes
2. 2.🎯 Which CSS selector matches this element?
   <p class="red" id="main">Hello</p> (a) .box (b) h1 (c) .red (d) .main
3. 3.🎯 Which element does the selector div style? (a) <span> (b) <div class="star"> (c) <h1 id="main"> (d) <p class="star">
4. 4.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
5. 5.🎯 Which CSS selector matches this element?
   <div class="box" id="top">Hello</div> (a) #intro (b) .top (c) span (d) #top
6. 6.🎯 Which CSS selector matches this element?
   <li class="note" id="top">Hello</li> (a) #intro (b) .big (c) #top (d) #note
7. 7.🎯 Which element does the selector #top style? (a) <span class="top"> (b) <p class="box"> (c) <span id="intro"> (d) <span id="top">
8. 8.🎯 Which sign starts a class selector? (a) # (b) @ (c) . (d) &
9. 9.🎯 Which element does the selector p style? (a) <h2 class="box"> (b) <p class="box"> (c) <h1> (d) <li id="end">
10. 10.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
11. 11.True or false: h1 is an element selector. (a) False (b) True
12. 12.🎯 Which element does the selector h2 style? (a) <h2 class="red"> (b) <li> (c) <div class="red"> (d) <span id="main">
13. 13.🎯 Which element does the selector .red style? (a) <li class="star"> (b) <h2 class="red"> (c) <h2 class="box"> (d) <h2 id="red">
14. 14.🎯 Which CSS selector matches this element?
    <p class="menu" id="end">Hello</p> (a) #hero (b) #end (c) #menu (d) h1
15. 15.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
16. 16.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) .big (b) .top (c) h2 (d) .red
17. 17.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
18. 18.True or false: #top is an id selector. (a) False (b) True
19. 19.🎯 Which element does the selector .note style? (a) <div class="note"> (b) <span class="red"> (c) <div id="note"> (d) <div class="big">
20. 20.🎯 Which element does the selector .box style? (a) <div id="box"> (b) <span class="menu"> (c) <div class="star"> (d) <div class="box">
21. 21.True or false: h1 is a class selector. (a) True (b) False
22. 22.True or false: .star is a class selector. (a) False (b) True
23. 23.True or false: h1 is an id selector. (a) False (b) True
24. 24.True or false: li is a class selector. (a) True (b) False
25. 25.🎯 What kind of selector is body? (a) an element selector (b) a class selector (c) an id selector
26. 26.🎯 Which CSS selector matches this element?
    <p class="note" id="end">Hello</p> (a) p (b) #note (c) #hero (d) .big
27. 27.🎯 What kind of selector is .note? (a) a class selector (b) an element selector (c) an id selector
28. 28.True or false: p is an id selector. (a) False (b) True
29. 29.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
30. 30.🎯 Which element does the selector .star style? (a) <span class="menu"> (b) <p class="note"> (c) <span id="star"> (d) <span class="star">
31. 31.🎯 Which CSS selector matches this element?
    <h2 class="note" id="logo">Hello</h2> (a) #end (b) .logo (c) li (d) h2
32. 32.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2> (a) .big (b) li (c) #logo (d) .main
33. 33.True or false: #logo is a class selector. (a) True (b) False
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2> (a) .menu (b) .star (c) li (d) #star
35. 35.🎯 Which element does the selector .menu style? (a) <div id="menu"> (b) <div class="note"> (c) <div class="menu"> (d) <span class="big">
36. 36.🎯 Which CSS selector matches this element?
    <li class="star" id="logo">Hello</li> (a) .menu (b) .star (c) .logo (d) div
37. 37.🎯 Which element does the selector .big style? (a) <div class="box"> (b) <li id="big"> (c) <li class="big"> (d) <li class="red">
38. 38.🎯 Which CSS selector matches this element?
    <h2 class="star" id="top">Hello</h2> (a) #top (b) .top (c) li (d) #star
39. 39.🎯 Which element does the selector #logo style? (a) <span id="logo"> (b) <span id="end"> (c) <span class="logo"> (d) <p class="note">
40. 40.🎯 Which element does the selector .menu style? (a) <p class="note"> (b) <p class="menu"> (c) <h1 class="big"> (d) <p id="menu">

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