CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 300 · 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.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
2. 2.🎯 Which CSS selector matches this element?
   <span class="menu" id="logo">Hello</span> (a) #menu (b) .note (c) #logo (d) p
3. 3.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
4. 4.🎯 Which element does the selector h2 style? (a) <span id="intro"> (b) <h2 class="big"> (c) <li> (d) <div class="big">
5. 5.True or false: h1 is an element selector. (a) False (b) True
6. 6.🎯 Which CSS selector matches this element?
   <li class="red" id="logo">Hello</li> (a) .box (b) li (c) #red (d) #end
7. 7.🎯 Which element does the selector h1 style? (a) <h1 class="note"> (b) <div id="end"> (c) <h2> (d) <li class="note">
8. 8.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
9. 9.True or false: p is an id selector. (a) False (b) True
10. 10.🎯 Which element does the selector h1 style? (a) <div id="intro"> (b) <h2> (c) <h1 class="red"> (d) <li class="red">
11. 11.🎯 Which sign starts a class selector? (a) # (b) @ (c) & (d) .
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="box" id="logo">Hello</h2> (a) #end (b) li (c) h2 (d) .logo
13. 13.🎯 Which element does the selector #main style? (a) <li id="logo"> (b) <li id="main"> (c) <li class="main"> (d) <div class="red">
14. 14.🎯 Which element does the selector #logo style? (a) <span id="end"> (b) <p class="note"> (c) <span id="logo"> (d) <span class="logo">
15. 15.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
16. 16.🎯 Can many elements share the same class? (a) No (b) Yes
17. 17.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
18. 18.🎯 Which element does the selector .star style? (a) <p id="star"> (b) <h1 class="note"> (c) <p class="star"> (d) <p class="menu">
19. 19.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) .intro (b) .star (c) h2 (d) .menu
20. 20.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
21. 21.🎯 Which CSS selector matches this element?
    <h2 class="star" id="top">Hello</h2> (a) #top (b) .top (c) #intro (d) #star
22. 22.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) .big (b) li (c) #top (d) .hero
23. 23.True or false: .big is an element selector. (a) False (b) True
24. 24.🎯 Which element does the selector #intro style? (a) <h1 id="main"> (b) <h1 id="intro"> (c) <h1 class="intro"> (d) <h2 class="star">
25. 25.🎯 Which element does the selector h2 style? (a) <div class="box"> (b) <h2 class="box"> (c) <span id="end"> (d) <li>
26. 26.🎯 Which sign starts an id selector? (a) # (b) @ (c) . (d) &
27. 27.🎯 Which CSS selector matches this element?
    <span class="star" id="main">Hello</span> (a) .main (b) p (c) #logo (d) span
28. 28.True or false: #top is an element selector. (a) True (b) False
29. 29.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
30. 30.🎯 Which CSS selector matches this element?
    <h1 class="box" id="hero">Hello</h1> (a) #top (b) .star (c) #hero (d) .hero
31. 31.🎯 Which element does the selector .red style? (a) <span class="box"> (b) <span class="red"> (c) <p class="star"> (d) <span id="red">
32. 32.True or false: .big is a class selector. (a) False (b) True
33. 33.🎯 Which element does the selector h2 style? (a) <h2 class="star"> (b) <div class="star"> (c) <li> (d) <span id="hero">
34. 34.True or false: .menu is a class selector. (a) False (b) True
35. 35.True or false: #logo is a class selector. (a) True (b) False
36. 36.🎯 Which element does the selector li style? (a) <span class="menu"> (b) <p id="intro"> (c) <li class="menu"> (d) <div>
37. 37.🎯 Which CSS selector matches this element?
    <li class="star" id="logo">Hello</li> (a) #star (b) .logo (c) .star (d) .menu
38. 38.🎯 Which element does the selector p style? (a) <p class="note"> (b) <li id="intro"> (c) <h2 class="note"> (d) <h1>
39. 39.🎯 Which CSS selector matches this element?
    <li class="star" id="top">Hello</li> (a) #star (b) div (c) .menu (d) #top
40. 40.True or false: #main is an id selector. (a) False (b) True

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