CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 75 · 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.🎯 Which CSS selector matches this element?
   <h1 class="red" id="hero">Hello</h1> (a) #top (b) .box (c) .red (d) #red
2. 2.🎯 Which element does the selector #logo style? (a) <h1 class="logo"> (b) <h2 class="note"> (c) <h1 id="logo"> (d) <h1 id="end">
3. 3.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="intro"> (c) <h1 class="red"> (d) <span class="red">
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="red" id="logo">Hello</h1> (a) #red (b) #logo (c) h2 (d) #end
5. 5.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
6. 6.🎯 Which sign starts a class selector? (a) # (b) @ (c) . (d) &
7. 7.True or false: p is an element selector. (a) False (b) True
8. 8.🎯 Which CSS selector matches this element?
   <h2 class="box" id="main">Hello</h2> (a) .main (b) h2 (c) #box (d) #logo
9. 9.🎯 Which element does the selector .menu style? (a) <p class="big"> (b) <span class="menu"> (c) <span id="menu"> (d) <span class="note">
10. 10.🎯 How many elements on a page should have the same id? (a) 5 (b) 1 (c) 2 (d) any number
11. 11.True or false: h1 is an id selector. (a) False (b) True
12. 12.🎯 Which element does the selector #intro style? (a) <h2 id="intro"> (b) <h2 id="main"> (c) <h2 class="intro"> (d) <li class="star">
13. 13.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="big" id="intro">Hello</h2> (a) h2 (b) #big (c) #main (d) .intro
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="big" id="top">Hello</h2> (a) .red (b) #intro (c) .top (d) #top
16. 16.🎯 Which element does the selector li style? (a) <div> (b) <li class="box"> (c) <span class="box"> (d) <p id="top">
17. 17.🎯 What kind of selector is .note? (a) an id selector (b) a class selector (c) an element selector
18. 18.🎯 Which CSS selector matches this element?
    <div class="note" id="top">Hello</div> (a) #intro (b) .top (c) .big (d) div
19. 19.True or false: .star is a class selector. (a) False (b) True
20. 20.True or false: li is an id selector. (a) True (b) False
21. 21.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) #main (b) p (c) .box (d) .intro
22. 22.🎯 What kind of selector is body? (a) an element selector (b) an id selector (c) a class selector
23. 23.🎯 Can many elements share the same class? (a) No (b) Yes
24. 24.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
25. 25.🎯 Which CSS selector matches this element?
    <span class="big" id="hero">Hello</span> (a) .hero (b) #big (c) #top (d) .big
26. 26.🎯 Which CSS selector matches this element?
    <li class="box" id="hero">Hello</li> (a) #top (b) .star (c) li (d) .hero
27. 27.🎯 What kind of selector is #logo? (a) an id selector (b) a class selector (c) an element selector
28. 28.🎯 Which element does the selector .star style? (a) <div class="menu"> (b) <span class="note"> (c) <div id="star"> (d) <div class="star">
29. 29.🎯 Which CSS selector matches this element?
    <li class="red" id="main">Hello</li> (a) #red (b) #logo (c) li (d) .box
30. 30.True or false: body is a class selector. (a) True (b) False
31. 31.🎯 Which element does the selector div style? (a) <h1 id="top"> (b) <span> (c) <p class="note"> (d) <div class="note">
32. 32.🎯 Which CSS selector matches this element?
    <p class="red" id="hero">Hello</p> (a) #top (b) .hero (c) #hero (d) h1
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2> (a) #note (b) #hero (c) .big (d) .hero
34. 34.🎯 Which CSS selector matches this element?
    <div class="menu" id="main">Hello</div> (a) #logo (b) .main (c) #menu (d) div
35. 35.🎯 Which element does the selector li style? (a) <span class="big"> (b) <p id="main"> (c) <div> (d) <li class="big">
36. 36.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div> (a) .note (b) #main (c) #intro (d) .intro
37. 37.🎯 Which CSS selector matches this element?
    <h1 class="big" id="intro">Hello</h1> (a) .red (b) .big (c) #main (d) #big
38. 38.True or false: #hero is a class selector. (a) True (b) False
39. 39.🎯 Which CSS selector matches this element?
    <h1 class="star" id="end">Hello</h1> (a) #hero (b) h2 (c) .end (d) h1
40. 40.🎯 Which CSS selector matches this element?
    <li class="box" id="top">Hello</li> (a) .star (b) #box (c) div (d) #top

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