CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 220 · 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?
   <span class="note" id="end">Hello</span> (a) .big (b) span (c) p (d) .end
3. 3.True or false: #hero is an id selector. (a) False (b) True
4. 4.🎯 Which element does the selector h2 style? (a) <div class="red"> (b) <li> (c) <span id="main"> (d) <h2 class="red">
5. 5.🎯 Which element does the selector #intro style? (a) <li class="intro"> (b) <li id="intro"> (c) <li id="main"> (d) <div class="menu">
6. 6.🎯 What kind of selector is .star? (a) an element selector (b) a class selector (c) an id selector
7. 7.🎯 Which CSS selector matches this element?
   <li class="box" id="top">Hello</li> (a) .top (b) li (c) div (d) #box
8. 8.🎯 Which element does the selector #top style? (a) <p class="top"> (b) <h1 class="big"> (c) <p id="top"> (d) <p id="intro">
9. 9.🎯 Which element does the selector #end style? (a) <div class="menu"> (b) <li id="hero"> (c) <li class="end"> (d) <li id="end">
10. 10.🎯 Which CSS selector matches this element?
    <div class="box" id="logo">Hello</div> (a) .logo (b) .box (c) #box (d) span
11. 11.🎯 Which sign starts an id selector? (a) . (b) & (c) # (d) @
12. 12.True or false: .big is an element selector. (a) False (b) True
13. 13.🎯 How many elements on a page should have the same id? (a) 1 (b) 2 (c) any number (d) 5
14. 14.True or false: .menu is a class selector. (a) False (b) True
15. 15.🎯 Which element does the selector li style? (a) <p id="logo"> (b) <li class="big"> (c) <div> (d) <span class="big">
16. 16.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
17. 17.True or false: #logo is an element selector. (a) False (b) True
18. 18.🎯 Which element does the selector .big style? (a) <li class="red"> (b) <li id="big"> (c) <div class="box"> (d) <li class="big">
19. 19.True or false: img is an element selector. (a) True (b) False
20. 20.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
21. 21.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="hero"> (c) <li class="menu"> (d) <h1 class="menu">
22. 22.True or false: .note is an id selector. (a) True (b) False
23. 23.🎯 Which CSS selector matches this element?
    <p class="red" id="end">Hello</p> (a) #end (b) #red (c) .box (d) #hero
24. 24.True or false: #logo is an id selector. (a) True (b) False
25. 25.True or false: .note is a class selector. (a) False (b) True
26. 26.True or false: .star is an id selector. (a) False (b) True
27. 27.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) #box (b) .star (c) #hero (d) #end
28. 28.🎯 Which CSS selector matches this element?
    <p class="note" id="main">Hello</p> (a) .big (b) #note (c) #main (d) .main
29. 29.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
30. 30.True or false: body is an id selector. (a) True (b) False
31. 31.🎯 Which CSS selector matches this element?
    <li class="menu" id="top">Hello</li> (a) .top (b) .menu (c) div (d) #menu
32. 32.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="star"> (c) <div class="menu"> (d) <li class="box">
33. 33.🎯 Which CSS selector matches this element?
    <span class="star" id="top">Hello</span> (a) .menu (b) .star (c) .top (d) p
34. 34.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
35. 35.🎯 Which element does the selector span style? (a) <span class="red"> (b) <h2 id="top"> (c) <p> (d) <h1 class="red">
36. 36.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1> (a) #big (b) .big (c) .logo (d) .red
37. 37.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
38. 38.🎯 Which element does the selector #intro style? (a) <h2 class="intro"> (b) <h2 id="intro"> (c) <h2 id="main"> (d) <li class="star">
39. 39.True or false: #end is an id selector. (a) False (b) True
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) .intro (b) #note (c) #main (d) .note

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