CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 45 · 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) any number (b) 2 (c) 5 (d) 1
2. 2.🎯 What kind of selector is body? (a) a class selector (b) an element selector (c) an id selector
3. 3.🎯 Which sign starts an id selector? (a) . (b) @ (c) # (d) &
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="note" id="intro">Hello</h1> (a) #note (b) #main (c) .note (d) .intro
5. 5.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
6. 6.True or false: .note is a class selector. (a) False (b) True
7. 7.🎯 Which sign starts a class selector? (a) & (b) @ (c) . (d) #
8. 8.True or false: li is a class selector. (a) True (b) False
9. 9.True or false: .big is a class selector. (a) False (b) True
10. 10.🎯 Which CSS selector matches this element?
    <div class="star" id="hero">Hello</div> (a) #top (b) div (c) .menu (d) .hero
11. 11.🎯 Which element does the selector h2 style? (a) <span id="intro"> (b) <li> (c) <h2 class="red"> (d) <div class="red">
12. 12.True or false: p is an id selector. (a) False (b) True
13. 13.🎯 Can many elements share the same class? (a) No (b) Yes
14. 14.True or false: body is an id selector. (a) True (b) False
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) #top (b) #big (c) li (d) .big
16. 16.True or false: .star is a class selector. (a) False (b) True
17. 17.True or false: h1 is an id selector. (a) True (b) False
18. 18.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="main">Hello</h1> (a) #menu (b) .main (c) #logo (d) #main
19. 19.🎯 Which element does the selector #intro style? (a) <p class="red"> (b) <span id="main"> (c) <span class="intro"> (d) <span id="intro">
20. 20.🎯 Which element does the selector .note style? (a) <h2 class="red"> (b) <h1 class="big"> (c) <h1 id="note"> (d) <h1 class="note">
21. 21.True or false: .note is an element selector. (a) True (b) False
22. 22.🎯 Which element does the selector .star style? (a) <p class="note"> (b) <span class="star"> (c) <span class="menu"> (d) <span id="star">
23. 23.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
24. 24.🎯 Which CSS selector matches this element?
    <div class="star" id="logo">Hello</div> (a) #star (b) #logo (c) .menu (d) .logo
25. 25.True or false: .card is a class selector. (a) False (b) True
26. 26.🎯 Which CSS selector matches this element?
    <p class="red" id="hero">Hello</p> (a) #red (b) p (c) .hero (d) .box
27. 27.🎯 Which element does the selector #hero style? (a) <p class="hero"> (b) <p id="hero"> (c) <h1 class="note"> (d) <p id="top">
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) #star (b) h2 (c) h1 (d) .logo
29. 29.🎯 Which CSS selector matches this element?
    <p class="box" id="hero">Hello</p> (a) #box (b) .hero (c) #hero (d) .star
30. 30.True or false: .note is an id selector. (a) False (b) True
31. 31.True or false: img is an element selector. (a) False (b) True
32. 32.🎯 Which element does the selector #hero style? (a) <li id="hero"> (b) <li class="hero"> (c) <div class="box"> (d) <li id="top">
33. 33.🎯 Which CSS selector matches this element?
    <li class="red" id="intro">Hello</li> (a) .box (b) #main (c) .red (d) #red
34. 34.🎯 Which element does the selector #end style? (a) <h2 class="box"> (b) <h1 class="end"> (c) <h1 id="hero"> (d) <h1 id="end">
35. 35.🎯 Which CSS selector matches this element?
    <h2 class="red" id="main">Hello</h2> (a) .box (b) #logo (c) .main (d) .red
36. 36.🎯 What kind of selector is #top? (a) an id selector (b) a class selector (c) an element selector
37. 37.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
38. 38.🎯 Which element does the selector .box style? (a) <div class="star"> (b) <span class="menu"> (c) <div class="box"> (d) <div id="box">
39. 39.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) .big (b) .intro (c) h1 (d) p
40. 40.🎯 Which element does the selector div style? (a) <p class="star"> (b) <h1 id="top"> (c) <div class="star"> (d) <span>

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