CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 376 · 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 sign starts a class selector? (a) . (b) @ (c) # (d) &
2. 2.🎯 Which CSS selector matches this element?
   <div class="note" id="intro">Hello</div> (a) .big (b) #main (c) #note (d) #intro
3. 3.True or false: body is an id selector. (a) True (b) False
4. 4.🎯 Which element does the selector .note style? (a) <p class="red"> (b) <span id="note"> (c) <span class="note"> (d) <span class="big">
5. 5.True or false: .big is an id selector. (a) False (b) True
6. 6.🎯 Which element does the selector div style? (a) <div class="big"> (b) <h1 id="top"> (c) <span> (d) <p class="big">
7. 7.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="intro">Hello</h2> (a) #main (b) h2 (c) #menu (d) li
8. 8.True or false: .big is a class selector. (a) True (b) False
9. 9.🎯 Which sign starts an id selector? (a) # (b) @ (c) . (d) &
10. 10.True or false: .card is an element selector. (a) True (b) False
11. 11.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 5 (d) 2
12. 12.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) #big (b) span (c) .red (d) p
13. 13.🎯 Which CSS selector matches this element?
    <li class="box" id="intro">Hello</li> (a) li (b) #box (c) .star (d) div
14. 14.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) .big (b) .note (c) h1 (d) #intro
15. 15.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) .red (b) #top (c) #big (d) #hero
16. 16.True or false: .star is an id selector. (a) False (b) True
17. 17.🎯 Which element does the selector .note style? (a) <h1 class="big"> (b) <h2 class="red"> (c) <h1 class="note"> (d) <h1 id="note">
18. 18.True or false: h1 is an element selector. (a) True (b) False
19. 19.🎯 Which CSS selector matches this element?
    <p class="menu" id="hero">Hello</p> (a) p (b) .note (c) h1 (d) #top
20. 20.🎯 Which element does the selector div style? (a) <h1 id="hero"> (b) <div class="box"> (c) <p class="box"> (d) <span>
21. 21.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
22. 22.🎯 Which CSS selector matches this element?
    <div class="star" id="intro">Hello</div> (a) .intro (b) #star (c) div (d) span
23. 23.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
24. 24.True or false: #end is a class selector. (a) False (b) True
25. 25.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) .hero (b) #note (c) p (d) #top
26. 26.🎯 Which element does the selector #end style? (a) <h1 class="end"> (b) <h2 class="box"> (c) <h1 id="end"> (d) <h1 id="hero">
27. 27.True or false: .menu is a class selector. (a) False (b) True
28. 28.🎯 Which element does the selector li style? (a) <li class="note"> (b) <div> (c) <p id="end"> (d) <span class="note">
29. 29.🎯 Which CSS selector matches this element?
    <span class="menu" id="hero">Hello</span> (a) #menu (b) span (c) .hero (d) #top
30. 30.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
31. 31.🎯 Which element does the selector .box style? (a) <h1 id="box"> (b) <h2 class="menu"> (c) <h1 class="star"> (d) <h1 class="box">
32. 32.🎯 Which element does the selector .red style? (a) <li class="box"> (b) <li class="red"> (c) <div class="star"> (d) <li id="red">
33. 33.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) #intro (b) .big (c) h1 (d) .top
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="big" id="top">Hello</h2> (a) #intro (b) .top (c) #big (d) h2
35. 35.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="logo">Hello</h2> (a) .logo (b) h2 (c) .note (d) #menu
36. 36.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) h1 (b) #main (c) .red (d) .big
37. 37.🎯 Which CSS selector matches this element?
    <div class="star" id="end">Hello</div> (a) #hero (b) .end (c) .star (d) .menu
38. 38.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
39. 39.🎯 Can many elements share the same class? (a) No (b) Yes
40. 40.🎯 Which CSS selector matches this element?
    <div class="note" id="top">Hello</div> (a) .big (b) .top (c) div (d) #note

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