CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 92 · 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 h1? (a) an id selector (b) an element selector (c) a class selector
2. 2.🎯 Which element does the selector h2 style? (a) <li> (b) <div class="note"> (c) <h2 class="note"> (d) <span id="main">
3. 3.🎯 Which CSS selector matches this element?
   <span class="box" id="hero">Hello</span> (a) #top (b) #box (c) .star (d) span
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="box" id="top">Hello</h1> (a) #box (b) #intro (c) .star (d) h1
5. 5.🎯 Which CSS selector matches this element?
   <h1 class="note" id="top">Hello</h1> (a) .top (b) h1 (c) #note (d) .big
6. 6.🎯 Which CSS selector matches this element?
   <h1 class="red" id="intro">Hello</h1> (a) h2 (b) #main (c) .box (d) h1
7. 7.🎯 What kind of selector is #hero? (a) an element selector (b) a class selector (c) an id selector
8. 8.True or false: #main is an element selector. (a) False (b) True
9. 9.🎯 Which sign starts a class selector? (a) . (b) & (c) @ (d) #
10. 10.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) #main (b) span (c) div (d) .intro
11. 11.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
12. 12.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) #main (b) #menu (c) h1 (d) .main
13. 13.True or false: h1 is an id selector. (a) False (b) True
14. 14.🎯 Which element does the selector .note style? (a) <span class="note"> (b) <span id="note"> (c) <p class="red"> (d) <span class="big">
15. 15.🎯 Which CSS selector matches this element?
    <h1 class="box" id="main">Hello</h1> (a) .main (b) #main (c) #box (d) .star
16. 16.🎯 Which CSS selector matches this element?
    <span class="star" id="logo">Hello</span> (a) .logo (b) #star (c) .menu (d) .star
17. 17.True or false: .menu is an id selector. (a) False (b) True
18. 18.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) #big (b) #top (c) .top (d) #intro
19. 19.True or false: img is an element selector. (a) False (b) True
20. 20.True or false: .note is a class selector. (a) False (b) True
21. 21.🎯 Which element does the selector span style? (a) <p> (b) <h1 class="note"> (c) <h2 id="logo"> (d) <span class="note">
22. 22.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
23. 23.True or false: #end is a class selector. (a) False (b) True
24. 24.True or false: .menu is a class selector. (a) False (b) True
25. 25.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
26. 26.🎯 Which element does the selector .big style? (a) <h2 class="red"> (b) <h2 id="big"> (c) <h2 class="big"> (d) <li class="box">
27. 27.True or false: #hero is an element selector. (a) True (b) False
28. 28.🎯 How many elements on a page should have the same id? (a) 5 (b) 1 (c) any number (d) 2
29. 29.🎯 Which CSS selector matches this element?
    <p class="red" id="main">Hello</p> (a) #logo (b) .main (c) h1 (d) p
30. 30.🎯 Which element does the selector .big style? (a) <p class="red"> (b) <p id="big"> (c) <h1 class="box"> (d) <p class="big">
31. 31.🎯 Can many elements share the same class? (a) No (b) Yes
32. 32.🎯 Which CSS selector matches this element?
    <li class="big" id="intro">Hello</li> (a) #big (b) .intro (c) .red (d) .big
33. 33.True or false: .note is an id selector. (a) False (b) True
34. 34.🎯 Which CSS selector matches this element?
    <li class="star" id="main">Hello</li> (a) #star (b) .menu (c) li (d) #logo
35. 35.True or false: .star is a class selector. (a) False (b) True
36. 36.🎯 Which CSS selector matches this element?
    <p class="menu" id="intro">Hello</p> (a) h1 (b) .menu (c) .intro (d) #menu
37. 37.🎯 Which CSS selector matches this element?
    <div class="menu" id="main">Hello</div> (a) span (b) #menu (c) .main (d) .menu
38. 38.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) #big (b) span (c) .top (d) .red
39. 39.True or false: body is a class selector. (a) True (b) False
40. 40.True or false: .big is a class selector. (a) True (b) False

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