CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 380 · 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) 5 (b) 1 (c) 2 (d) any number
2. 2.🎯 Which CSS selector matches this element?
   <div class="box" id="top">Hello</div> (a) #top (b) #intro (c) .star (d) #box
3. 3.🎯 Which sign starts a class selector? (a) & (b) @ (c) . (d) #
4. 4.🎯 Which element does the selector #main style? (a) <li class="star"> (b) <h2 id="main"> (c) <h2 id="logo"> (d) <h2 class="main">
5. 5.True or false: #hero is an id selector. (a) False (b) True
6. 6.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
7. 7.🎯 Which CSS selector matches this element?
   <span class="star" id="top">Hello</span> (a) #top (b) .top (c) .menu (d) p
8. 8.True or false: .menu is an id selector. (a) True (b) False
9. 9.🎯 Which sign starts an id selector? (a) & (b) # (c) @ (d) .
10. 10.🎯 Which element does the selector #logo style? (a) <div class="logo"> (b) <span class="menu"> (c) <div id="end"> (d) <div id="logo">
11. 11.🎯 Which CSS selector matches this element?
    <h1 class="note" id="hero">Hello</h1> (a) h2 (b) h1 (c) #note (d) .big
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="red" id="main">Hello</h2> (a) #red (b) #logo (c) #main (d) .main
13. 13.True or false: .card is a class selector. (a) False (b) True
14. 14.True or false: .menu is a class selector. (a) False (b) True
15. 15.🎯 Which element does the selector .red style? (a) <div class="box"> (b) <div class="red"> (c) <div id="red"> (d) <span class="star">
16. 16.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
17. 17.🎯 What kind of selector is #hero? (a) an element selector (b) a class selector (c) an id selector
18. 18.True or false: body is a class selector. (a) True (b) False
19. 19.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
20. 20.True or false: .star is an id selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <h1 class="star" id="main">Hello</h1> (a) .main (b) #star (c) .menu (d) .star
22. 22.🎯 Which CSS selector matches this element?
    <h2 class="big" id="end">Hello</h2> (a) #end (b) .red (c) li (d) #big
23. 23.🎯 Which element does the selector .red style? (a) <p class="star"> (b) <span class="box"> (c) <span class="red"> (d) <span id="red">
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="logo">Hello</h1> (a) #logo (b) .note (c) #end (d) #menu
25. 25.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) #hero (b) .end (c) div (d) #menu
26. 26.🎯 Which CSS selector matches this element?
    <li class="box" id="top">Hello</li> (a) #box (b) div (c) #intro (d) #top
27. 27.🎯 Which element does the selector .star style? (a) <span class="star"> (b) <p class="note"> (c) <span id="star"> (d) <span class="menu">
28. 28.🎯 Which element does the selector h2 style? (a) <h2 class="red"> (b) <li> (c) <span id="logo"> (d) <div class="red">
29. 29.True or false: #top is an element selector. (a) True (b) False
30. 30.🎯 What kind of selector is #top? (a) a class selector (b) an element selector (c) an id selector
31. 31.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
32. 32.🎯 Which element does the selector #end style? (a) <li id="end"> (b) <li id="hero"> (c) <div class="box"> (d) <li class="end">
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="main">Hello</h2> (a) #logo (b) .menu (c) .note (d) #menu
34. 34.🎯 Which element does the selector #top style? (a) <h2 class="menu"> (b) <h1 class="top"> (c) <h1 id="intro"> (d) <h1 id="top">
35. 35.🎯 Which element does the selector p style? (a) <h2 class="red"> (b) <p class="red"> (c) <li id="hero"> (d) <h1>
36. 36.True or false: img is a class selector. (a) True (b) False
37. 37.True or false: .big is a class selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <span class="star" id="top">Hello</span> (a) p (b) span (c) .menu (d) #intro
39. 39.True or false: #hero is an element selector. (a) True (b) False
40. 40.🎯 Can many elements share the same class? (a) Yes (b) No

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