CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 734 · 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.True or false: .star is an id selector. (a) False (b) True
2. 2.🎯 Which sign starts a class selector? (a) @ (b) # (c) & (d) .
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="red" id="main">Hello</h1> (a) .box (b) #logo (c) .main (d) #main
4. 4.🎯 Which CSS selector matches this element?
   <div class="note" id="logo">Hello</div> (a) .big (b) #note (c) .note (d) .logo
5. 5.🎯 Which element does the selector p style? (a) <h2 class="menu"> (b) <h1> (c) <li id="hero"> (d) <p class="menu">
6. 6.True or false: .menu is an id selector. (a) False (b) True
7. 7.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
8. 8.🎯 Which CSS selector matches this element?
   <li class="red" id="main">Hello</li> (a) #red (b) #logo (c) div (d) .red
9. 9.True or false: p is an element selector. (a) True (b) False
10. 10.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
11. 11.True or false: body is an id selector. (a) True (b) False
12. 12.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
13. 13.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
14. 14.🎯 Which sign starts an id selector? (a) # (b) . (c) & (d) @
15. 15.🎯 Which element does the selector .big style? (a) <span class="big"> (b) <p class="box"> (c) <span id="big"> (d) <span class="red">
16. 16.🎯 How many elements on a page should have the same id? (a) any number (b) 2 (c) 5 (d) 1
17. 17.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) #menu (b) .menu (c) #hero (d) span
18. 18.🎯 Which element does the selector div style? (a) <p class="box"> (b) <span> (c) <h1 id="intro"> (d) <div class="box">
19. 19.🎯 Which element does the selector #logo style? (a) <span id="end"> (b) <span id="logo"> (c) <p class="red"> (d) <span class="logo">
20. 20.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
21. 21.🎯 Which CSS selector matches this element?
    <p class="box" id="intro">Hello</p> (a) #box (b) .intro (c) h1 (d) #intro
22. 22.🎯 Which element does the selector .star style? (a) <p id="star"> (b) <p class="menu"> (c) <h1 class="note"> (d) <p class="star">
23. 23.🎯 Which element does the selector #hero style? (a) <p id="hero"> (b) <p id="top"> (c) <p class="hero"> (d) <h1 class="big">
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1> (a) .end (b) .red (c) #big (d) #end
25. 25.🎯 Which element does the selector .box style? (a) <li class="star"> (b) <li id="box"> (c) <li class="box"> (d) <div class="menu">
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="note" id="end">Hello</h2> (a) .big (b) li (c) h2 (d) #hero
27. 27.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p> (a) h1 (b) p (c) .menu (d) #intro
28. 28.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) #end (b) #menu (c) #hero (d) .end
29. 29.True or false: .big is a class selector. (a) False (b) True
30. 30.🎯 Can many elements share the same class? (a) No (b) Yes
31. 31.🎯 Which element does the selector #intro style? (a) <div class="intro"> (b) <div id="main"> (c) <span class="menu"> (d) <div id="intro">
32. 32.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) .note (b) .big (c) .intro (d) p
33. 33.🎯 Which element does the selector #end style? (a) <h1 id="end"> (b) <h1 class="end"> (c) <h2 class="star"> (d) <h1 id="hero">
34. 34.🎯 Which element does the selector .red style? (a) <span class="star"> (b) <div id="red"> (c) <div class="box"> (d) <div class="red">
35. 35.True or false: #main is an id selector. (a) True (b) False
36. 36.🎯 Which CSS selector matches this element?
    <div class="big" id="top">Hello</div> (a) #big (b) div (c) #intro (d) span
37. 37.True or false: .note is an id selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <div class="big" id="hero">Hello</div> (a) .red (b) #hero (c) span (d) #top
39. 39.🎯 Which element does the selector h2 style? (a) <span id="intro"> (b) <li> (c) <h2 class="red"> (d) <div class="red">
40. 40.🎯 Which element does the selector .red style? (a) <h1 class="box"> (b) <h2 class="star"> (c) <h1 class="red"> (d) <h1 id="red">

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