CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 639 · 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: #top is an element selector. (a) False (b) True
2. 2.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="note" id="hero">Hello</h1> (a) #hero (b) #note (c) .hero (d) .big
4. 4.🎯 Which sign starts an id selector? (a) @ (b) # (c) . (d) &
5. 5.🎯 Which element does the selector div style? (a) <div class="menu"> (b) <span> (c) <h1 id="end"> (d) <p class="menu">
6. 6.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
7. 7.True or false: #end is an id selector. (a) True (b) False
8. 8.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
9. 9.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
10. 10.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1> (a) h1 (b) .top (c) #menu (d) #intro
11. 11.🎯 Can many elements share the same class? (a) Yes (b) No
12. 12.🎯 Which CSS selector matches this element?
    <div class="star" id="top">Hello</div> (a) #intro (b) span (c) .menu (d) .star
13. 13.🎯 Which element does the selector #top style? (a) <h1 id="intro"> (b) <h2 class="menu"> (c) <h1 id="top"> (d) <h1 class="top">
14. 14.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
15. 15.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) #hero (b) p (c) #big (d) span
16. 16.🎯 Which CSS selector matches this element?
    <h1 class="big" id="hero">Hello</h1> (a) .red (b) #hero (c) h2 (d) #top
17. 17.True or false: .card is an element selector. (a) False (b) True
18. 18.True or false: .note is an element selector. (a) False (b) True
19. 19.🎯 Which element does the selector #hero style? (a) <li class="menu"> (b) <h2 id="hero"> (c) <h2 id="top"> (d) <h2 class="hero">
20. 20.True or false: img is an element selector. (a) True (b) False
21. 21.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) #top (b) #note (c) li (d) div
22. 22.True or false: li is a class selector. (a) False (b) True
23. 23.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
24. 24.🎯 Which CSS selector matches this element?
    <li class="note" id="intro">Hello</li> (a) #main (b) .intro (c) li (d) .big
25. 25.True or false: #main is an element selector. (a) True (b) False
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="hero">Hello</h2> (a) #top (b) li (c) .menu (d) .note
27. 27.True or false: p is an id selector. (a) False (b) True
28. 28.🎯 Which element does the selector #logo style? (a) <h2 class="box"> (b) <h1 id="end"> (c) <h1 class="logo"> (d) <h1 id="logo">
29. 29.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) #logo (b) .note (c) h1 (d) p
30. 30.🎯 Which element does the selector #end style? (a) <div class="big"> (b) <li id="hero"> (c) <li class="end"> (d) <li id="end">
31. 31.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
32. 32.True or false: .card is a class selector. (a) False (b) True
33. 33.🎯 Which element does the selector #top style? (a) <div class="red"> (b) <li id="top"> (c) <li id="intro"> (d) <li class="top">
34. 34.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
35. 35.🎯 Which element does the selector .big style? (a) <p class="big"> (b) <h1 class="box"> (c) <p id="big"> (d) <p class="red">
36. 36.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li> (a) #logo (b) #end (c) #menu (d) .logo
37. 37.True or false: #top is an id selector. (a) True (b) False
38. 38.🎯 Which element does the selector span style? (a) <p> (b) <h1 class="note"> (c) <h2 id="main"> (d) <span class="note">
39. 39.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
40. 40.True or false: #hero is an element selector. (a) True (b) False

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