CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 603 · 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 .note? (a) an id selector (b) a class selector (c) an element selector
2. 2.🎯 Which element does the selector .box style? (a) <span class="star"> (b) <p class="menu"> (c) <span class="box"> (d) <span id="box">
3. 3.🎯 Which CSS selector matches this element?
   <span class="note" id="hero">Hello</span> (a) .big (b) #top (c) p (d) #hero
4. 4.🎯 Which element does the selector .star style? (a) <p class="star"> (b) <h1 class="note"> (c) <p class="menu"> (d) <p id="star">
5. 5.True or false: li is a class selector. (a) False (b) True
6. 6.🎯 Which CSS selector matches this element?
   <div class="box" id="main">Hello</div> (a) #box (b) div (c) .main (d) #logo
7. 7.🎯 Which CSS selector matches this element?
   <span class="menu" id="main">Hello</span> (a) .menu (b) #logo (c) .main (d) #menu
8. 8.🎯 Which element does the selector span style? (a) <h2 id="end"> (b) <p> (c) <h1 class="box"> (d) <span class="box">
9. 9.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="star"> (c) <div class="menu"> (d) <li class="box">
10. 10.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
11. 11.True or false: #end is an id selector. (a) True (b) False
12. 12.True or false: img is an id selector. (a) False (b) True
13. 13.🎯 Which sign starts a class selector? (a) @ (b) # (c) . (d) &
14. 14.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) .hero (b) p (c) h1 (d) #top
15. 15.True or false: .note is a class selector. (a) False (b) True
16. 16.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) #box (b) .star (c) .main (d) .box
17. 17.🎯 What kind of selector is .big? (a) a class selector (b) an id selector (c) an element selector
18. 18.🎯 Which element does the selector .note style? (a) <div class="big"> (b) <span class="red"> (c) <div class="note"> (d) <div id="note">
19. 19.True or false: .note is an id selector. (a) True (b) False
20. 20.🎯 Which CSS selector matches this element?
    <div class="box" id="top">Hello</div> (a) div (b) #intro (c) .top (d) span
21. 21.🎯 What kind of selector is #hero? (a) an element selector (b) an id selector (c) a class selector
22. 22.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) #big (b) p (c) #top (d) .red
23. 23.True or false: p is an element selector. (a) False (b) True
24. 24.🎯 Which element does the selector .note style? (a) <h2 class="big"> (b) <li class="red"> (c) <h2 id="note"> (d) <h2 class="note">
25. 25.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
26. 26.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h1 id="red"> (c) <h1 class="box"> (d) <h2 class="star">
27. 27.True or false: .menu is an id selector. (a) False (b) True
28. 28.🎯 Which element does the selector .big style? (a) <div id="big"> (b) <div class="red"> (c) <span class="box"> (d) <div class="big">
29. 29.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
30. 30.🎯 Which CSS selector matches this element?
    <div class="big" id="intro">Hello</div> (a) .intro (b) #main (c) #big (d) #intro
31. 31.🎯 What kind of selector is body? (a) a class selector (b) an id selector (c) an element selector
32. 32.🎯 Can many elements share the same class? (a) Yes (b) No
33. 33.🎯 Which CSS selector matches this element?
    <div class="box" id="top">Hello</div> (a) .top (b) span (c) .box (d) #box
34. 34.🎯 Which CSS selector matches this element?
    <span class="red" id="intro">Hello</span> (a) #main (b) span (c) .intro (d) #red
35. 35.🎯 Which element does the selector p style? (a) <h1> (b) <h2 class="red"> (c) <li id="hero"> (d) <p class="red">
36. 36.True or false: #logo is an id selector. (a) False (b) True
37. 37.🎯 Which element does the selector li style? (a) <p id="end"> (b) <span class="box"> (c) <div> (d) <li class="box">
38. 38.🎯 Which element does the selector .red style? (a) <h2 class="box"> (b) <h2 class="red"> (c) <li class="star"> (d) <h2 id="red">
39. 39.🎯 Which element does the selector #top style? (a) <span id="intro"> (b) <span id="top"> (c) <p class="note"> (d) <span class="top">
40. 40.True or false: #hero is an id selector. (a) True (b) False

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