CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 903 · 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 #hero? (a) an id selector (b) an element selector (c) a class selector
2. 2.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
3. 3.True or false: #hero is an element selector. (a) True (b) False
4. 4.True or false: .card is an id selector. (a) False (b) True
5. 5.True or false: .big is a class selector. (a) True (b) False
6. 6.🎯 Which CSS selector matches this element?
   <li class="box" id="end">Hello</li> (a) .end (b) #hero (c) .box (d) div
7. 7.🎯 Which CSS selector matches this element?
   <div class="note" id="top">Hello</div> (a) span (b) #top (c) .top (d) #note
8. 8.🎯 Which sign starts an id selector? (a) @ (b) # (c) & (d) .
9. 9.🎯 Can many elements share the same class? (a) No (b) Yes
10. 10.True or false: .card is a class selector. (a) False (b) True
11. 11.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
12. 12.True or false: .note is an id selector. (a) True (b) False
13. 13.🎯 Which CSS selector matches this element?
    <div class="note" id="top">Hello</div> (a) #intro (b) span (c) div (d) .big
14. 14.True or false: #end is a class selector. (a) False (b) True
15. 15.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
16. 16.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) #intro (b) .menu (c) li (d) #star
17. 17.True or false: #main is an id selector. (a) False (b) True
18. 18.🎯 Which sign starts a class selector? (a) # (b) @ (c) . (d) &
19. 19.🎯 Which element does the selector h1 style? (a) <div id="logo"> (b) <h2> (c) <li class="big"> (d) <h1 class="big">
20. 20.🎯 Which element does the selector .menu style? (a) <p class="big"> (b) <span class="menu"> (c) <span class="note"> (d) <span id="menu">
21. 21.🎯 Which CSS selector matches this element?
    <div class="note" id="main">Hello</div> (a) .main (b) #main (c) span (d) #note
22. 22.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) #intro (b) .red (c) #top (d) .top
23. 23.🎯 Which CSS selector matches this element?
    <p class="menu" id="end">Hello</p> (a) p (b) h1 (c) #hero (d) #menu
24. 24.True or false: h1 is an element selector. (a) False (b) True
25. 25.🎯 Which element does the selector span style? (a) <h2 id="top"> (b) <span class="box"> (c) <h1 class="box"> (d) <p>
26. 26.🎯 Which element does the selector .note style? (a) <p class="note"> (b) <p id="note"> (c) <h1 class="red"> (d) <p class="big">
27. 27.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
28. 28.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) .red (b) span (c) #big (d) .top
29. 29.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) span (b) .big (c) .intro (d) #main
30. 30.True or false: .note is an element selector. (a) True (b) False
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="note" id="hero">Hello</h1> (a) #hero (b) .hero (c) #note (d) .big
32. 32.🎯 Which element does the selector #intro style? (a) <div id="intro"> (b) <span class="red"> (c) <div id="main"> (d) <div class="intro">
33. 33.True or false: .star is an element selector. (a) False (b) True
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="box" id="end">Hello</h2> (a) #box (b) #hero (c) h2 (d) .end
35. 35.🎯 Which element does the selector .star style? (a) <p class="note"> (b) <span id="star"> (c) <span class="menu"> (d) <span class="star">
36. 36.True or false: #top is an id selector. (a) True (b) False
37. 37.True or false: #hero is an id selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1> (a) .top (b) #top (c) .star (d) #box
39. 39.🎯 Which element does the selector #logo style? (a) <div class="big"> (b) <li id="logo"> (c) <li class="logo"> (d) <li id="end">
40. 40.True or false: h1 is an id selector. (a) False (b) True

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