CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 379 · 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.🎯 How many elements on a page should have the same id? (a) 1 (b) 5 (c) any number (d) 2
2. 2.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector
3. 3.🎯 Can many elements share the same class? (a) Yes (b) No
4. 4.True or false: .note is a class selector. (a) True (b) False
5. 5.🎯 What kind of selector is #hero? (a) a class selector (b) an id selector (c) an element selector
6. 6.🎯 Which CSS selector matches this element?
   <div class="red" id="logo">Hello</div> (a) div (b) .box (c) span (d) #red
7. 7.True or false: #top is a class selector. (a) False (b) True
8. 8.True or false: .menu is an element selector. (a) True (b) False
9. 9.🎯 Which element does the selector .red style? (a) <li class="star"> (b) <h2 id="red"> (c) <h2 class="box"> (d) <h2 class="red">
10. 10.🎯 Which CSS selector matches this element?
    <p class="red" id="end">Hello</p> (a) #hero (b) .red (c) h1 (d) .end
11. 11.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) #main (b) .box (c) #red (d) #intro
12. 12.True or false: img is an element selector. (a) False (b) True
13. 13.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
14. 14.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) span (b) .box (c) #red (d) div
15. 15.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .main (b) .star (c) #main (d) #logo
16. 16.True or false: p is an id selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <div class="red" id="top">Hello</div> (a) #red (b) span (c) div (d) .top
18. 18.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) .intro (b) .note (c) #main (d) .big
19. 19.True or false: .star is an element selector. (a) False (b) True
20. 20.🎯 Which element does the selector .box style? (a) <div class="star"> (b) <span class="menu"> (c) <div id="box"> (d) <div class="box">
21. 21.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) .note (b) #menu (c) h1 (d) p
22. 22.True or false: h1 is an element selector. (a) True (b) False
23. 23.🎯 Which element does the selector #end style? (a) <span class="end"> (b) <span id="hero"> (c) <span id="end"> (d) <p class="menu">
24. 24.True or false: body is an id selector. (a) False (b) True
25. 25.True or false: .card is an id selector. (a) False (b) True
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) #note (b) .intro (c) .note (d) .big
27. 27.🎯 Which element does the selector .star style? (a) <h2 id="star"> (b) <h2 class="star"> (c) <li class="note"> (d) <h2 class="menu">
28. 28.True or false: .menu is an id selector. (a) False (b) True
29. 29.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
30. 30.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) .box (b) .star (c) #hero (d) .end
31. 31.🎯 Which element does the selector #end style? (a) <h1 class="end"> (b) <h1 id="hero"> (c) <h2 class="menu"> (d) <h1 id="end">
32. 32.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="intro"> (c) <h1 class="note"> (d) <span class="note">
33. 33.🎯 Which element does the selector .note style? (a) <div id="note"> (b) <div class="note"> (c) <span class="red"> (d) <div class="big">
34. 34.True or false: li is an element selector. (a) True (b) False
35. 35.🎯 Which element does the selector h1 style? (a) <h1 class="note"> (b) <h2> (c) <div id="end"> (d) <li class="note">
36. 36.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div> (a) #intro (b) .intro (c) #menu (d) .note
37. 37.True or false: h1 is a class selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <div class="box" id="top">Hello</div> (a) .star (b) .box (c) #box (d) span
39. 39.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
40. 40.🎯 Which sign starts a class selector? (a) @ (b) & (c) . (d) #

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