CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 927 · 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 element does the selector #top style? (a) <h2 class="top"> (b) <li class="menu"> (c) <h2 id="intro"> (d) <h2 id="top">
2. 2.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 2 (d) 5
3. 3.🎯 Which CSS selector matches this element?
   <p class="note" id="hero">Hello</p> (a) #hero (b) .big (c) #top (d) #note
4. 4.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
5. 5.True or false: .star is a class selector. (a) False (b) True
6. 6.🎯 Which element does the selector #intro style? (a) <div class="red"> (b) <li id="intro"> (c) <li id="main"> (d) <li class="intro">
7. 7.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
8. 8.🎯 Which sign starts an id selector? (a) . (b) & (c) # (d) @
9. 9.True or false: .card is a class selector. (a) False (b) True
10. 10.True or false: h1 is a class selector. (a) True (b) False
11. 11.🎯 Which element does the selector #main style? (a) <li id="main"> (b) <div class="big"> (c) <li class="main"> (d) <li id="logo">
12. 12.True or false: body is an element selector. (a) False (b) True
13. 13.True or false: #logo is an id selector. (a) True (b) False
14. 14.🎯 Can many elements share the same class? (a) No (b) Yes
15. 15.🎯 Which element does the selector .star style? (a) <div id="star"> (b) <span class="note"> (c) <div class="menu"> (d) <div class="star">
16. 16.🎯 Which element does the selector #logo style? (a) <p class="box"> (b) <span class="logo"> (c) <span id="logo"> (d) <span id="end">
17. 17.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
18. 18.🎯 Which CSS selector matches this element?
    <h1 class="note" id="hero">Hello</h1> (a) .hero (b) .note (c) #note (d) #top
19. 19.🎯 Which CSS selector matches this element?
    <li class="menu" id="intro">Hello</li> (a) .menu (b) .note (c) .intro (d) #menu
20. 20.🎯 Which element does the selector .big style? (a) <h2 class="red"> (b) <h2 id="big"> (c) <h2 class="big"> (d) <li class="box">
21. 21.🎯 Which CSS selector matches this element?
    <div class="menu" id="logo">Hello</div> (a) .note (b) #logo (c) #menu (d) .logo
22. 22.True or false: #end is an element selector. (a) True (b) False
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="box" id="intro">Hello</h1> (a) .star (b) h2 (c) #box (d) #intro
24. 24.True or false: p is a class selector. (a) False (b) True
25. 25.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) h1 (b) .end (c) .star (d) .box
26. 26.🎯 Which element does the selector #hero style? (a) <span id="hero"> (b) <span class="hero"> (c) <span id="top"> (d) <p class="note">
27. 27.🎯 Which element does the selector #end style? (a) <li class="note"> (b) <h2 id="end"> (c) <h2 id="hero"> (d) <h2 class="end">
28. 28.🎯 Which element does the selector #logo style? (a) <h2 class="logo"> (b) <h2 id="end"> (c) <li class="big"> (d) <h2 id="logo">
29. 29.🎯 Which CSS selector matches this element?
    <div class="big" id="logo">Hello</div> (a) span (b) #end (c) .big (d) #big
30. 30.🎯 Which CSS selector matches this element?
    <h2 class="box" id="top">Hello</h2> (a) li (b) h2 (c) .top (d) .star
31. 31.🎯 Which element does the selector #intro style? (a) <span class="intro"> (b) <p class="big"> (c) <span id="intro"> (d) <span id="main">
32. 32.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) .big (b) #top (c) h1 (d) .hero
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="red" id="hero">Hello</h2> (a) #red (b) #top (c) .box (d) #hero
34. 34.True or false: h1 is an id selector. (a) True (b) False
35. 35.🎯 Which CSS selector matches this element?
    <div class="box" id="top">Hello</div> (a) #box (b) span (c) .top (d) div
36. 36.🎯 Which element does the selector .red style? (a) <div class="box"> (b) <div id="red"> (c) <div class="red"> (d) <span class="star">
37. 37.True or false: li is a class selector. (a) False (b) True
38. 38.True or false: #hero is a class selector. (a) True (b) False
39. 39.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) .menu (b) h1 (c) .star (d) #star
40. 40.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) #menu (b) #hero (c) .end (d) div

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