CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 238 · 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?
   <h2 class="big" id="hero">Hello</h2> (a) li (b) .hero (c) h2 (d) #big
2. 2.🎯 Which sign starts a class selector? (a) # (b) @ (c) . (d) &
3. 3.🎯 How many elements on a page should have the same id? (a) any number (b) 5 (c) 2 (d) 1
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="note" id="intro">Hello</h1> (a) #intro (b) .big (c) h2 (d) #main
5. 5.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
6. 6.🎯 Which element does the selector h1 style? (a) <div id="intro"> (b) <li class="red"> (c) <h1 class="red"> (d) <h2>
7. 7.🎯 Which element does the selector h1 style? (a) <h1 class="box"> (b) <div id="hero"> (c) <li class="box"> (d) <h2>
8. 8.🎯 What kind of selector is li? (a) an element selector (b) an id selector (c) a class selector
9. 9.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
10. 10.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
11. 11.🎯 Which CSS selector matches this element?
    <h1 class="red" id="hero">Hello</h1> (a) #top (b) .box (c) .red (d) .hero
12. 12.🎯 Can many elements share the same class? (a) No (b) Yes
13. 13.🎯 Which CSS selector matches this element?
    <p class="big" id="end">Hello</p> (a) #hero (b) h1 (c) #end (d) .end
14. 14.🎯 Which CSS selector matches this element?
    <span class="big" id="logo">Hello</span> (a) p (b) #big (c) #end (d) #logo
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2> (a) .note (b) .hero (c) .big (d) #top
16. 16.True or false: #top is a class selector. (a) False (b) True
17. 17.🎯 Which CSS selector matches this element?
    <span class="big" id="hero">Hello</span> (a) #big (b) #hero (c) .hero (d) #top
18. 18.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) h1 (b) #big (c) p (d) #main
19. 19.🎯 Which element does the selector .menu style? (a) <h1 class="menu"> (b) <h2 class="big"> (c) <h1 class="note"> (d) <h1 id="menu">
20. 20.True or false: .big is a class selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) #big (b) .big (c) #hero (d) div
22. 22.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
23. 23.True or false: .menu is an id selector. (a) False (b) True
24. 24.🎯 Which element does the selector #main style? (a) <p id="main"> (b) <p id="logo"> (c) <h1 class="note"> (d) <p class="main">
25. 25.🎯 Which CSS selector matches this element?
    <li class="big" id="top">Hello</li> (a) #big (b) #intro (c) li (d) .top
26. 26.🎯 Which element does the selector #top style? (a) <div id="top"> (b) <span class="big"> (c) <div id="intro"> (d) <div class="top">
27. 27.🎯 Which CSS selector matches this element?
    <p class="red" id="end">Hello</p> (a) h1 (b) p (c) #hero (d) #red
28. 28.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
29. 29.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p> (a) #star (b) h1 (c) .star (d) .intro
30. 30.🎯 Which CSS selector matches this element?
    <p class="star" id="main">Hello</p> (a) .menu (b) .main (c) .star (d) #logo
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="box" id="logo">Hello</h1> (a) #logo (b) #end (c) #box (d) h2
32. 32.🎯 Which sign starts an id selector? (a) . (b) @ (c) # (d) &
33. 33.🎯 Which CSS selector matches this element?
    <div class="big" id="top">Hello</div> (a) #big (b) .top (c) div (d) #intro
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) .intro (b) #main (c) .note (d) h1
35. 35.🎯 Which element does the selector #logo style? (a) <p class="logo"> (b) <h1 class="star"> (c) <p id="end"> (d) <p id="logo">
36. 36.True or false: h1 is an element selector. (a) False (b) True
37. 37.True or false: .menu is a class selector. (a) False (b) True
38. 38.🎯 Which element does the selector #intro style? (a) <h1 class="intro"> (b) <h1 id="intro"> (c) <h2 class="big"> (d) <h1 id="main">
39. 39.True or false: #top is an id selector. (a) False (b) True
40. 40.🎯 Which element does the selector li style? (a) <li class="big"> (b) <p id="top"> (c) <span class="big"> (d) <div>

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