CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 310 · 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 element does the selector .note style? (a) <h1 id="note"> (b) <h1 class="big"> (c) <h2 class="red"> (d) <h1 class="note">
2. 2.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
3. 3.🎯 Which sign starts a class selector? (a) # (b) & (c) @ (d) .
4. 4.🎯 Which element does the selector .note style? (a) <p class="note"> (b) <h1 class="red"> (c) <p id="note"> (d) <p class="big">
5. 5.🎯 Which CSS selector matches this element?
   <h1 class="note" id="intro">Hello</h1> (a) .big (b) h2 (c) .note (d) .intro
6. 6.True or false: .star is a class selector. (a) False (b) True
7. 7.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
8. 8.True or false: .card is an id selector. (a) True (b) False
9. 9.True or false: li is a class selector. (a) True (b) False
10. 10.🎯 Which element does the selector #end style? (a) <div id="hero"> (b) <span class="big"> (c) <div id="end"> (d) <div class="end">
11. 11.🎯 Which element does the selector #logo style? (a) <li class="box"> (b) <h2 id="logo"> (c) <h2 class="logo"> (d) <h2 id="end">
12. 12.🎯 Which CSS selector matches this element?
    <li class="star" id="intro">Hello</li> (a) li (b) .intro (c) #star (d) #main
13. 13.True or false: .menu is a class selector. (a) True (b) False
14. 14.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) p (b) .red (c) #top (d) h1
15. 15.🎯 Which CSS selector matches this element?
    <p class="red" id="logo">Hello</p> (a) #red (b) #end (c) .logo (d) .red
16. 16.🎯 Which sign starts an id selector? (a) @ (b) . (c) # (d) &
17. 17.True or false: img is a class selector. (a) True (b) False
18. 18.🎯 Which CSS selector matches this element?
    <div class="box" id="main">Hello</div> (a) #logo (b) #box (c) span (d) #main
19. 19.🎯 Which element does the selector h1 style? (a) <h1 class="note"> (b) <li class="note"> (c) <div id="top"> (d) <h2>
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="big" id="main">Hello</h1> (a) .big (b) #logo (c) h2 (d) .main
21. 21.🎯 Can many elements share the same class? (a) Yes (b) No
22. 22.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
23. 23.🎯 Which element does the selector #hero style? (a) <span id="top"> (b) <span id="hero"> (c) <p class="red"> (d) <span class="hero">
24. 24.🎯 Which element does the selector .note style? (a) <div class="big"> (b) <div id="note"> (c) <span class="red"> (d) <div class="note">
25. 25.True or false: #logo is an id selector. (a) True (b) False
26. 26.True or false: .card is a class selector. (a) False (b) True
27. 27.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
28. 28.True or false: #main is an element selector. (a) False (b) True
29. 29.True or false: #top is an element selector. (a) False (b) True
30. 30.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h2 class="star"> (c) <h1 id="red"> (d) <h1 class="box">
31. 31.True or false: h1 is a class selector. (a) True (b) False
32. 32.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) .intro (b) #big (c) p (d) h1
33. 33.🎯 Which CSS selector matches this element?
    <li class="note" id="intro">Hello</li> (a) .big (b) div (c) li (d) #note
34. 34.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div> (a) #menu (b) #intro (c) .intro (d) #main
35. 35.🎯 Which element does the selector .note style? (a) <li id="note"> (b) <li class="big"> (c) <div class="red"> (d) <li class="note">
36. 36.🎯 Which element does the selector h1 style? (a) <h1 class="menu"> (b) <li class="menu"> (c) <div id="top"> (d) <h2>
37. 37.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) .box (b) .star (c) #logo (d) li
38. 38.🎯 Which CSS selector matches this element?
    <div class="big" id="hero">Hello</div> (a) .red (b) div (c) span (d) #big
39. 39.🎯 Which CSS selector matches this element?
    <span class="note" id="intro">Hello</span> (a) .intro (b) p (c) #note (d) .note
40. 40.🎯 Which CSS selector matches this element?
    <p class="red" id="main">Hello</p> (a) .red (b) h1 (c) #red (d) .main

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