CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 41 · 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.🎯 How many elements on a page should have the same id? (a) 1 (b) 2 (c) any number (d) 5
2. 2.🎯 Which element does the selector h2 style? (a) <span id="hero"> (b) <h2 class="note"> (c) <li> (d) <div class="note">
3. 3.True or false: .big is an id selector. (a) True (b) False
4. 4.🎯 Which CSS selector matches this element?
   <p class="box" id="hero">Hello</p> (a) h1 (b) .star (c) #hero (d) #top
5. 5.🎯 Which sign starts a class selector? (a) . (b) @ (c) # (d) &
6. 6.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="red"> (c) <div id="hero"> (d) <li class="red">
7. 7.True or false: img is an element selector. (a) True (b) False
8. 8.🎯 Which element does the selector li style? (a) <span class="note"> (b) <li class="note"> (c) <div> (d) <p id="main">
9. 9.🎯 Which CSS selector matches this element?
   <div class="big" id="end">Hello</div> (a) .end (b) #big (c) #hero (d) .big
10. 10.True or false: #hero is an id selector. (a) False (b) True
11. 11.🎯 Which CSS selector matches this element?
    <div class="box" id="hero">Hello</div> (a) #box (b) .box (c) .hero (d) #top
12. 12.🎯 Which element does the selector #logo style? (a) <p id="logo"> (b) <p id="end"> (c) <p class="logo"> (d) <h1 class="big">
13. 13.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
14. 14.🎯 Which element does the selector #end style? (a) <div id="hero"> (b) <div class="end"> (c) <span class="box"> (d) <div id="end">
15. 15.True or false: .menu is a class selector. (a) True (b) False
16. 16.🎯 Which element does the selector .note style? (a) <p class="big"> (b) <h1 class="red"> (c) <p id="note"> (d) <p class="note">
17. 17.🎯 Which CSS selector matches this element?
    <div class="menu" id="top">Hello</div> (a) #intro (b) .note (c) span (d) .menu
18. 18.🎯 Which CSS selector matches this element?
    <p class="menu" id="intro">Hello</p> (a) .intro (b) #menu (c) .menu (d) .note
19. 19.🎯 Which sign starts an id selector? (a) . (b) @ (c) & (d) #
20. 20.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
21. 21.🎯 Which CSS selector matches this element?
    <h1 class="big" id="intro">Hello</h1> (a) .big (b) h2 (c) #big (d) .red
22. 22.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
23. 23.🎯 Which element does the selector h2 style? (a) <span id="hero"> (b) <li> (c) <div class="box"> (d) <h2 class="box">
24. 24.🎯 Can many elements share the same class? (a) Yes (b) No
25. 25.🎯 What kind of selector is .note? (a) a class selector (b) an element selector (c) an id selector
26. 26.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="main"> (c) <li class="note"> (d) <h1 class="note">
27. 27.🎯 Which CSS selector matches this element?
    <h1 class="note" id="logo">Hello</h1> (a) #end (b) .big (c) #note (d) h1
28. 28.🎯 Which CSS selector matches this element?
    <span class="red" id="intro">Hello</span> (a) #red (b) #intro (c) p (d) .intro
29. 29.🎯 Which CSS selector matches this element?
    <h2 class="note" id="intro">Hello</h2> (a) #main (b) li (c) #note (d) #intro
30. 30.🎯 Which element does the selector #top style? (a) <div id="top"> (b) <span class="star"> (c) <div class="top"> (d) <div id="intro">
31. 31.🎯 Which element does the selector div style? (a) <div class="menu"> (b) <p class="menu"> (c) <h1 id="top"> (d) <span>
32. 32.True or false: .star is a class selector. (a) False (b) True
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="star" id="top">Hello</h2> (a) li (b) .menu (c) .star (d) #star
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="top">Hello</h2> (a) #top (b) .top (c) #menu (d) li
35. 35.🎯 Which element does the selector .big style? (a) <span class="big"> (b) <span class="red"> (c) <span id="big"> (d) <p class="box">
36. 36.🎯 Which element does the selector #intro style? (a) <h1 id="main"> (b) <h1 id="intro"> (c) <h2 class="note"> (d) <h1 class="intro">
37. 37.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) li (b) #top (c) .big (d) #note
38. 38.True or false: #top is an id selector. (a) False (b) True
39. 39.True or false: #hero is an element selector. (a) True (b) False
40. 40.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector

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