CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 843 · 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 sign starts a class selector? (a) @ (b) & (c) # (d) .
2. 2.🎯 Which sign starts an id selector? (a) . (b) @ (c) & (d) #
3. 3.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
4. 4.🎯 Which CSS selector matches this element?
   <div class="big" id="logo">Hello</div> (a) #big (b) div (c) .logo (d) #end
5. 5.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
6. 6.🎯 Which element does the selector #main style? (a) <span id="logo"> (b) <span id="main"> (c) <span class="main"> (d) <p class="note">
7. 7.🎯 What kind of selector is .big? (a) an element selector (b) a class selector (c) an id selector
8. 8.True or false: #end is an id selector. (a) False (b) True
9. 9.🎯 Which element does the selector #intro style? (a) <h2 class="intro"> (b) <li class="big"> (c) <h2 id="main"> (d) <h2 id="intro">
10. 10.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="top"> (c) <li class="note"> (d) <h1 class="note">
11. 11.🎯 What kind of selector is body? (a) a class selector (b) an element selector (c) an id selector
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) .intro (b) .menu (c) #main (d) h2
13. 13.True or false: .big is an element selector. (a) True (b) False
14. 14.🎯 Can many elements share the same class? (a) No (b) Yes
15. 15.True or false: body is an element selector. (a) False (b) True
16. 16.True or false: #top is a class selector. (a) False (b) True
17. 17.🎯 Which element does the selector li style? (a) <li class="big"> (b) <span class="big"> (c) <div> (d) <p id="top">
18. 18.🎯 Which CSS selector matches this element?
    <li class="menu" id="hero">Hello</li> (a) #menu (b) div (c) li (d) #top
19. 19.🎯 Which element does the selector #intro style? (a) <h1 class="menu"> (b) <p id="intro"> (c) <p id="main"> (d) <p class="intro">
20. 20.🎯 Which element does the selector #top style? (a) <div class="top"> (b) <div id="top"> (c) <span class="box"> (d) <div id="intro">
21. 21.🎯 Which CSS selector matches this element?
    <li class="box" id="hero">Hello</li> (a) #top (b) li (c) #box (d) .star
22. 22.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li> (a) .note (b) #end (c) div (d) #logo
23. 23.🎯 Which element does the selector #hero style? (a) <li class="hero"> (b) <div class="red"> (c) <li id="hero"> (d) <li id="top">
24. 24.🎯 Which element does the selector h1 style? (a) <h1 class="box"> (b) <div id="main"> (c) <h2> (d) <li class="box">
25. 25.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) #end (b) .logo (c) #star (d) #logo
26. 26.🎯 Which element does the selector .box style? (a) <p class="star"> (b) <p class="box"> (c) <h1 class="menu"> (d) <p id="box">
27. 27.🎯 Which element does the selector li style? (a) <li class="menu"> (b) <p id="top"> (c) <span class="menu"> (d) <div>
28. 28.True or false: #main is a class selector. (a) True (b) False
29. 29.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
30. 30.True or false: .star is an id selector. (a) True (b) False
31. 31.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) .big (b) #top (c) .red (d) li
32. 32.True or false: .menu is a class selector. (a) True (b) False
33. 33.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
34. 34.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) .big (b) #main (c) .note (d) .intro
35. 35.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
36. 36.🎯 How many elements on a page should have the same id? (a) 1 (b) 5 (c) 2 (d) any number
37. 37.🎯 Which element does the selector p style? (a) <h2 class="star"> (b) <li id="intro"> (c) <p class="star"> (d) <h1>
38. 38.🎯 Which element does the selector span style? (a) <h1 class="star"> (b) <span class="star"> (c) <p> (d) <h2 id="top">
39. 39.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span> (a) #logo (b) .star (c) #main (d) #box
40. 40.True or false: #logo is an element selector. (a) False (b) True

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