CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 645 · 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) True (b) False
2. 2.🎯 Which CSS selector matches this element?
   <h1 class="note" id="top">Hello</h1> (a) #intro (b) .big (c) h2 (d) #top
3. 3.🎯 Which CSS selector matches this element?
   <p class="star" id="main">Hello</p> (a) .star (b) .menu (c) h1 (d) #logo
4. 4.🎯 Can many elements share the same class? (a) No (b) Yes
5. 5.🎯 Which sign starts an id selector? (a) @ (b) & (c) . (d) #
6. 6.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
7. 7.🎯 Which CSS selector matches this element?
   <li class="note" id="top">Hello</li> (a) div (b) #note (c) #top (d) #intro
8. 8.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
9. 9.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
10. 10.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
11. 11.True or false: #logo is an id selector. (a) False (b) True
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="box" id="hero">Hello</h1> (a) #box (b) .hero (c) #top (d) .box
13. 13.🎯 Which CSS selector matches this element?
    <div class="box" id="end">Hello</div> (a) span (b) .box (c) #box (d) .star
14. 14.🎯 Which CSS selector matches this element?
    <p class="menu" id="intro">Hello</p> (a) .intro (b) h1 (c) .note (d) p
15. 15.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span> (a) p (b) #main (c) .intro (d) span
16. 16.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
17. 17.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
18. 18.True or false: body is a class selector. (a) True (b) False
19. 19.🎯 Which CSS selector matches this element?
    <h2 class="red" id="main">Hello</h2> (a) h2 (b) li (c) .box (d) .main
20. 20.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) #note (b) .big (c) .intro (d) #intro
21. 21.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) #top (b) #hero (c) .red (d) #big
22. 22.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) h1 (b) .logo (c) #end (d) #star
23. 23.🎯 Which element does the selector .star style? (a) <h2 class="menu"> (b) <h2 id="star"> (c) <li class="note"> (d) <h2 class="star">
24. 24.True or false: li is a class selector. (a) False (b) True
25. 25.🎯 Which element does the selector .star style? (a) <p class="note"> (b) <span id="star"> (c) <span class="star"> (d) <span class="menu">
26. 26.🎯 Which element does the selector #top style? (a) <div id="top"> (b) <div class="top"> (c) <span class="menu"> (d) <div id="intro">
27. 27.True or false: .big is a class selector. (a) False (b) True
28. 28.True or false: #hero is an id selector. (a) False (b) True
29. 29.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
30. 30.🎯 Which element does the selector #intro style? (a) <span id="intro"> (b) <span class="intro"> (c) <span id="main"> (d) <p class="menu">
31. 31.🎯 Which CSS selector matches this element?
    <span class="star" id="logo">Hello</span> (a) #star (b) #end (c) .star (d) p
32. 32.🎯 Which element does the selector .red style? (a) <li id="red"> (b) <li class="box"> (c) <div class="star"> (d) <li class="red">
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="box" id="end">Hello</h2> (a) .end (b) li (c) #box (d) .box
34. 34.🎯 Which element does the selector div style? (a) <p class="big"> (b) <div class="big"> (c) <span> (d) <h1 id="logo">
35. 35.True or false: .menu is an id selector. (a) False (b) True
36. 36.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
37. 37.🎯 Which CSS selector matches this element?
    <span class="big" id="main">Hello</span> (a) #main (b) .main (c) p (d) #big
38. 38.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) .star (b) #hero (c) .end (d) .box
39. 39.🎯 Which CSS selector matches this element?
    <li class="note" id="logo">Hello</li> (a) .logo (b) .note (c) .big (d) div
40. 40.🎯 Which CSS selector matches this element?
    <div class="star" id="top">Hello</div> (a) #top (b) .top (c) .menu (d) #star

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