CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 568 · 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: img is a class selector. (a) False (b) True
2. 2.🎯 Which sign starts an id selector? (a) @ (b) & (c) # (d) .
3. 3.🎯 Which CSS selector matches this element?
   <h2 class="box" id="top">Hello</h2> (a) li (b) #box (c) .top (d) h2
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="star" id="end">Hello</h1> (a) h2 (b) #star (c) #hero (d) h1
5. 5.True or false: .note is an element selector. (a) True (b) False
6. 6.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
7. 7.🎯 Can many elements share the same class? (a) Yes (b) No
8. 8.True or false: .star is a class selector. (a) False (b) True
9. 9.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
10. 10.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
11. 11.True or false: h1 is a class selector. (a) True (b) False
12. 12.🎯 Which element does the selector .big style? (a) <h2 id="big"> (b) <li class="box"> (c) <h2 class="big"> (d) <h2 class="red">
13. 13.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="top">Hello</h2> (a) #menu (b) .note (c) #intro (d) .menu
15. 15.True or false: .card is an id selector. (a) True (b) False
16. 16.🎯 Which element does the selector #intro style? (a) <p id="main"> (b) <p class="intro"> (c) <h1 class="star"> (d) <p id="intro">
17. 17.🎯 Which element does the selector .big style? (a) <h1 id="big"> (b) <h2 class="box"> (c) <h1 class="big"> (d) <h1 class="red">
18. 18.🎯 What kind of selector is .note? (a) a class selector (b) an element selector (c) an id selector
19. 19.🎯 Which CSS selector matches this element?
    <span class="star" id="top">Hello</span> (a) .menu (b) .top (c) #star (d) #top
20. 20.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span> (a) #hero (b) .star (c) p (d) .menu
21. 21.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) .red (b) .top (c) #intro (d) #top
22. 22.🎯 Which CSS selector matches this element?
    <h2 class="red" id="top">Hello</h2> (a) #intro (b) .red (c) #red (d) .top
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="big" id="intro">Hello</h1> (a) .red (b) h2 (c) #big (d) .big
24. 24.🎯 Which CSS selector matches this element?
    <li class="star" id="logo">Hello</li> (a) #logo (b) #star (c) div (d) .logo
25. 25.🎯 Which element does the selector .menu style? (a) <p id="menu"> (b) <h1 class="big"> (c) <p class="note"> (d) <p class="menu">
26. 26.🎯 Which sign starts a class selector? (a) # (b) @ (c) & (d) .
27. 27.True or false: #end is an id selector. (a) True (b) False
28. 28.🎯 Which element does the selector span style? (a) <span class="star"> (b) <h1 class="star"> (c) <h2 id="top"> (d) <p>
29. 29.🎯 Which element does the selector h1 style? (a) <li class="note"> (b) <div id="main"> (c) <h1 class="note"> (d) <h2>
30. 30.True or false: #hero is an id selector. (a) False (b) True
31. 31.🎯 Which element does the selector h2 style? (a) <div class="red"> (b) <span id="top"> (c) <h2 class="red"> (d) <li>
32. 32.🎯 Which element does the selector .menu style? (a) <p class="big"> (b) <span class="note"> (c) <span class="menu"> (d) <span id="menu">
33. 33.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
34. 34.🎯 How many elements on a page should have the same id? (a) any number (b) 5 (c) 2 (d) 1
35. 35.True or false: .note is a class selector. (a) True (b) False
36. 36.True or false: .menu is a class selector. (a) True (b) False
37. 37.🎯 Which CSS selector matches this element?
    <h2 class="note" id="top">Hello</h2> (a) .big (b) h2 (c) li (d) #note
38. 38.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
39. 39.True or false: .card is an element selector. (a) False (b) True
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="big" id="main">Hello</h1> (a) #big (b) #logo (c) #main (d) h2

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