CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 330 · 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.🎯 Can many elements share the same class? (a) Yes (b) No
2. 2.🎯 Which element does the selector #end style? (a) <h1 id="hero"> (b) <h1 id="end"> (c) <h2 class="red"> (d) <h1 class="end">
3. 3.🎯 Which CSS selector matches this element?
   <div class="box" id="logo">Hello</div> (a) #end (b) #box (c) span (d) div
4. 4.🎯 Which element does the selector #main style? (a) <h1 class="star"> (b) <p id="logo"> (c) <p id="main"> (d) <p class="main">
5. 5.True or false: #logo is an id selector. (a) True (b) False
6. 6.🎯 Which CSS selector matches this element?
   <span class="box" id="top">Hello</span> (a) .star (b) #box (c) #top (d) .top
7. 7.🎯 Which element does the selector #hero style? (a) <h1 id="hero"> (b) <h1 class="hero"> (c) <h2 class="note"> (d) <h1 id="top">
8. 8.🎯 Which element does the selector .box style? (a) <li id="box"> (b) <li class="box"> (c) <div class="menu"> (d) <li class="star">
9. 9.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
10. 10.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="hero"> (c) <h1 class="box"> (d) <span class="box">
11. 11.🎯 Which element does the selector h2 style? (a) <span id="intro"> (b) <li> (c) <div class="box"> (d) <h2 class="box">
12. 12.True or false: li is a class selector. (a) False (b) True
13. 13.🎯 Which CSS selector matches this element?
    <span class="star" id="logo">Hello</span> (a) .menu (b) .logo (c) #logo (d) #end
14. 14.True or false: .note is an element selector. (a) True (b) False
15. 15.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) .red (b) .box (c) .intro (d) #red
16. 16.🎯 Which element does the selector .big style? (a) <span class="red"> (b) <span id="big"> (c) <span class="big"> (d) <p class="box">
17. 17.🎯 Which element does the selector .red style? (a) <div class="star"> (b) <li id="red"> (c) <li class="box"> (d) <li class="red">
18. 18.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="red"> (c) <div id="top"> (d) <li class="red">
19. 19.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li> (a) #box (b) .main (c) .box (d) #logo
20. 20.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
21. 21.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
22. 22.🎯 Which element does the selector div style? (a) <span> (b) <div class="big"> (c) <h1 id="top"> (d) <p class="big">
23. 23.🎯 Which CSS selector matches this element?
    <p class="menu" id="top">Hello</p> (a) #menu (b) #intro (c) #top (d) .top
24. 24.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
25. 25.True or false: #hero is an id selector. (a) False (b) True
26. 26.🎯 Which element does the selector div style? (a) <p class="star"> (b) <h1 id="top"> (c) <span> (d) <div class="star">
27. 27.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
28. 28.🎯 Which element does the selector .red style? (a) <h2 class="red"> (b) <li class="star"> (c) <h2 class="box"> (d) <h2 id="red">
29. 29.🎯 Which CSS selector matches this element?
    <li class="star" id="main">Hello</li> (a) .star (b) #star (c) .main (d) div
30. 30.True or false: #hero is an element selector. (a) True (b) False
31. 31.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
32. 32.🎯 Which element does the selector #top style? (a) <li id="top"> (b) <li id="intro"> (c) <div class="note"> (d) <li class="top">
33. 33.🎯 What kind of selector is #top? (a) an id selector (b) a class selector (c) an element selector
34. 34.🎯 How many elements on a page should have the same id? (a) 1 (b) 2 (c) any number (d) 5
35. 35.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
36. 36.True or false: #top is an element selector. (a) True (b) False
37. 37.🎯 Which element does the selector #top style? (a) <p class="top"> (b) <p id="intro"> (c) <p id="top"> (d) <h1 class="note">
38. 38.🎯 Which element does the selector .big style? (a) <h1 id="big"> (b) <h1 class="red"> (c) <h2 class="box"> (d) <h1 class="big">
39. 39.🎯 Which CSS selector matches this element?
    <p class="note" id="main">Hello</p> (a) .main (b) #note (c) h1 (d) p
40. 40.True or false: .big is a class selector. (a) True (b) False

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