CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 504 · 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.True or false: body is a class selector. (a) False (b) True
2. 2.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
3. 3.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
4. 4.🎯 Which CSS selector matches this element?
   <li class="red" id="hero">Hello</li> (a) div (b) #top (c) .hero (d) .red
5. 5.🎯 What kind of selector is .star? (a) an id selector (b) a class selector (c) an element selector
6. 6.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
7. 7.🎯 Which element does the selector #top style? (a) <li class="top"> (b) <li id="top"> (c) <div class="star"> (d) <li id="intro">
8. 8.🎯 Which CSS selector matches this element?
   <span class="star" id="intro">Hello</span> (a) p (b) #star (c) .menu (d) span
9. 9.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="main">Hello</h1> (a) .note (b) h2 (c) #main (d) #menu
10. 10.True or false: li is an element selector. (a) True (b) False
11. 11.True or false: #top is an element selector. (a) True (b) False
12. 12.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) #big (b) #intro (c) p (d) .red
13. 13.True or false: #end is an id selector. (a) False (b) True
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="star" id="top">Hello</h2> (a) #intro (b) .top (c) h2 (d) .menu
15. 15.🎯 Which sign starts a class selector? (a) & (b) # (c) . (d) @
16. 16.🎯 Which sign starts an id selector? (a) & (b) @ (c) # (d) .
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) #logo (b) li (c) #main (d) .star
18. 18.🎯 Which element does the selector div style? (a) <h1 id="top"> (b) <span> (c) <div class="star"> (d) <p class="star">
19. 19.🎯 Which CSS selector matches this element?
    <div class="red" id="end">Hello</div> (a) .box (b) span (c) #hero (d) #end
20. 20.🎯 Which CSS selector matches this element?
    <h2 class="star" id="main">Hello</h2> (a) .menu (b) li (c) .main (d) h2
21. 21.🎯 Which element does the selector #intro style? (a) <li id="intro"> (b) <li class="intro"> (c) <div class="star"> (d) <li id="main">
22. 22.🎯 Which element does the selector .menu style? (a) <div id="menu"> (b) <div class="menu"> (c) <div class="note"> (d) <span class="big">
23. 23.True or false: .card is an element selector. (a) True (b) False
24. 24.🎯 Which CSS selector matches this element?
    <span class="menu" id="top">Hello</span> (a) p (b) #menu (c) #intro (d) #top
25. 25.🎯 Which element does the selector p style? (a) <p class="big"> (b) <h2 class="big"> (c) <h1> (d) <li id="intro">
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="red" id="hero">Hello</h1> (a) h2 (b) #top (c) #red (d) .red
27. 27.🎯 Which CSS selector matches this element?
    <p class="menu" id="top">Hello</p> (a) h1 (b) .top (c) #intro (d) .menu
28. 28.🎯 Which element does the selector #top style? (a) <h1 class="big"> (b) <p class="top"> (c) <p id="top"> (d) <p id="intro">
29. 29.🎯 Which element does the selector .red style? (a) <h2 class="star"> (b) <h1 id="red"> (c) <h1 class="red"> (d) <h1 class="box">
30. 30.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
31. 31.True or false: .big is an element selector. (a) False (b) True
32. 32.True or false: .note is an element selector. (a) False (b) True
33. 33.🎯 Which element does the selector #hero style? (a) <div class="hero"> (b) <div id="top"> (c) <div id="hero"> (d) <span class="note">
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) .intro (b) .star (c) h2 (d) #main
35. 35.True or false: .note is a class selector. (a) True (b) False
36. 36.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) #note (b) #top (c) li (d) .hero
37. 37.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span> (a) .star (b) #box (c) .intro (d) span
38. 38.🎯 Which element does the selector .menu style? (a) <h2 class="big"> (b) <h1 id="menu"> (c) <h1 class="menu"> (d) <h1 class="note">
39. 39.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="logo"> (c) <h1 class="red"> (d) <span class="red">
40. 40.🎯 Which CSS selector matches this element?
    <div class="red" id="end">Hello</div> (a) .box (b) #hero (c) span (d) div

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