CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 115 · 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) a class selector (b) an element selector (c) an id selector
2. 2.True or false: #hero is a class selector. (a) True (b) False
3. 3.🎯 Which CSS selector matches this element?
   <li class="note" id="hero">Hello</li> (a) .big (b) .note (c) #note (d) div
4. 4.True or false: #end is an id selector. (a) True (b) False
5. 5.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
6. 6.🎯 Which CSS selector matches this element?
   <span class="note" id="intro">Hello</span> (a) .intro (b) span (c) p (d) .big
7. 7.🎯 Can many elements share the same class? (a) No (b) Yes
8. 8.True or false: .star is an id selector. (a) False (b) True
9. 9.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
10. 10.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) any number (d) 1
11. 11.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1> (a) h2 (b) .box (c) .top (d) #box
12. 12.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="star"> (c) <li class="star"> (d) <div id="hero">
13. 13.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
14. 14.True or false: body is an id selector. (a) True (b) False
15. 15.True or false: .menu is a class selector. (a) True (b) False
16. 16.🎯 Which CSS selector matches this element?
    <li class="star" id="hero">Hello</li> (a) #star (b) .star (c) #top (d) .hero
17. 17.🎯 Which sign starts an id selector? (a) @ (b) . (c) # (d) &
18. 18.🎯 Which element does the selector p style? (a) <h2 class="big"> (b) <li id="main"> (c) <h1> (d) <p class="big">
19. 19.True or false: #end is a class selector. (a) False (b) True
20. 20.🎯 Which element does the selector .big style? (a) <li class="red"> (b) <li id="big"> (c) <div class="box"> (d) <li class="big">
21. 21.🎯 Which CSS selector matches this element?
    <span class="menu" id="hero">Hello</span> (a) span (b) .note (c) #top (d) #menu
22. 22.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) .note (b) #main (c) #logo (d) .main
23. 23.True or false: li is an element selector. (a) True (b) False
24. 24.🎯 Which CSS selector matches this element?
    <li class="box" id="end">Hello</li> (a) div (b) .star (c) li (d) #hero
25. 25.True or false: h1 is a class selector. (a) True (b) False
26. 26.🎯 What kind of selector is body? (a) an element selector (b) a class selector (c) an id selector
27. 27.🎯 Which CSS selector matches this element?
    <span class="red" id="intro">Hello</span> (a) .box (b) span (c) p (d) .intro
28. 28.🎯 Which element does the selector .note style? (a) <li class="red"> (b) <h2 class="big"> (c) <h2 class="note"> (d) <h2 id="note">
29. 29.True or false: #main is an id selector. (a) True (b) False
30. 30.🎯 Which CSS selector matches this element?
    <li class="box" id="intro">Hello</li> (a) .intro (b) #box (c) li (d) div
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) .big (b) #intro (c) .note (d) .top
32. 32.True or false: .big is a class selector. (a) True (b) False
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) #end (b) .menu (c) #star (d) h2
34. 34.🎯 Which element does the selector div style? (a) <h1 id="logo"> (b) <p class="star"> (c) <div class="star"> (d) <span>
35. 35.🎯 Which element does the selector #top style? (a) <p id="top"> (b) <h1 class="box"> (c) <p class="top"> (d) <p id="intro">
36. 36.🎯 Which CSS selector matches this element?
    <h1 class="note" id="end">Hello</h1> (a) .end (b) #hero (c) #note (d) h1
37. 37.🎯 Which element does the selector .star style? (a) <li class="star"> (b) <li id="star"> (c) <li class="menu"> (d) <div class="note">
38. 38.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
39. 39.True or false: li is a class selector. (a) False (b) True
40. 40.🎯 Which CSS selector matches this element?
    <div class="menu" id="main">Hello</div> (a) #logo (b) #menu (c) div (d) span

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