CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 131 · 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: h1 is an id selector. (a) False (b) True
2. 2.🎯 Can many elements share the same class? (a) No (b) Yes
3. 3.🎯 Which element does the selector .big style? (a) <p class="red"> (b) <p id="big"> (c) <h1 class="box"> (d) <p class="big">
4. 4.🎯 Which CSS selector matches this element?
   <span class="star" id="main">Hello</span> (a) p (b) #main (c) #star (d) .main
5. 5.🎯 Which CSS selector matches this element?
   <li class="star" id="logo">Hello</li> (a) div (b) li (c) #star (d) #end
6. 6.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
7. 7.True or false: body is an element selector. (a) True (b) False
8. 8.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
9. 9.🎯 Which element does the selector div style? (a) <p class="star"> (b) <div class="star"> (c) <h1 id="logo"> (d) <span>
10. 10.🎯 Which CSS selector matches this element?
    <div class="red" id="main">Hello</div> (a) .box (b) .red (c) #red (d) #logo
11. 11.🎯 What kind of selector is #top? (a) an element selector (b) an id selector (c) a class selector
12. 12.🎯 Which element does the selector #hero style? (a) <span class="menu"> (b) <div id="hero"> (c) <div class="hero"> (d) <div id="top">
13. 13.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
14. 14.True or false: .note is an element selector. (a) False (b) True
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="note" id="intro">Hello</h2> (a) .big (b) #main (c) #note (d) h2
16. 16.🎯 Which element does the selector .big style? (a) <div id="big"> (b) <div class="big"> (c) <div class="red"> (d) <span class="box">
17. 17.True or false: .card is a class selector. (a) False (b) True
18. 18.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
19. 19.🎯 Which sign starts a class selector? (a) @ (b) & (c) # (d) .
20. 20.🎯 Which sign starts an id selector? (a) # (b) & (c) . (d) @
21. 21.True or false: #main is an id selector. (a) True (b) False
22. 22.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
23. 23.True or false: .big is a class selector. (a) False (b) True
24. 24.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 2 (d) 5
25. 25.True or false: body is a class selector. (a) True (b) False
26. 26.🎯 Which element does the selector div style? (a) <span> (b) <h1 id="end"> (c) <div class="red"> (d) <p class="red">
27. 27.True or false: .note is a class selector. (a) True (b) False
28. 28.🎯 Which CSS selector matches this element?
    <li class="menu" id="end">Hello</li> (a) li (b) .note (c) #hero (d) .end
29. 29.True or false: .menu is an element selector. (a) True (b) False
30. 30.🎯 Which element does the selector div style? (a) <h1 id="intro"> (b) <div class="box"> (c) <span> (d) <p class="box">
31. 31.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
32. 32.🎯 Which element does the selector p style? (a) <h1> (b) <p class="red"> (c) <li id="hero"> (d) <h2 class="red">
33. 33.🎯 Which element does the selector li style? (a) <li class="star"> (b) <span class="star"> (c) <div> (d) <p id="logo">
34. 34.🎯 Which CSS selector matches this element?
    <p class="red" id="end">Hello</p> (a) .box (b) #hero (c) p (d) #red
35. 35.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) #big (b) span (c) #hero (d) .end
36. 36.🎯 What kind of selector is p? (a) an element selector (b) an id selector (c) a class selector
37. 37.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
38. 38.True or false: .note is an id selector. (a) True (b) False
39. 39.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) #red (b) p (c) #main (d) h1
40. 40.🎯 Which element does the selector #intro style? (a) <h1 class="box"> (b) <p id="main"> (c) <p class="intro"> (d) <p id="intro">

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