CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 505 · 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 CSS selector matches this element?
   <h1 class="star" id="main">Hello</h1> (a) h2 (b) h1 (c) #star (d) #logo
2. 2.🎯 Which element does the selector .box style? (a) <p id="box"> (b) <p class="star"> (c) <p class="box"> (d) <h1 class="menu">
3. 3.True or false: #logo is a class selector. (a) False (b) True
4. 4.🎯 Can many elements share the same class? (a) Yes (b) No
5. 5.🎯 Which CSS selector matches this element?
   <h2 class="star" id="hero">Hello</h2> (a) #hero (b) .hero (c) li (d) .menu
6. 6.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
7. 7.🎯 Which CSS selector matches this element?
   <span class="box" id="main">Hello</span> (a) #logo (b) #main (c) .main (d) #box
8. 8.True or false: #main is an id selector. (a) False (b) True
9. 9.🎯 Which element does the selector .menu style? (a) <h1 class="note"> (b) <h1 id="menu"> (c) <h1 class="menu"> (d) <h2 class="big">
10. 10.True or false: h1 is an element selector. (a) False (b) True
11. 11.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
12. 12.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
13. 13.True or false: #end is an id selector. (a) False (b) True
14. 14.🎯 What kind of selector is p? (a) a class selector (b) an element selector (c) an id selector
15. 15.🎯 Which element does the selector .star style? (a) <div class="menu"> (b) <div id="star"> (c) <div class="star"> (d) <span class="note">
16. 16.🎯 Which CSS selector matches this element?
    <span class="big" id="main">Hello</span> (a) #main (b) .main (c) .red (d) #big
17. 17.True or false: h1 is a class selector. (a) False (b) True
18. 18.🎯 Which sign starts a class selector? (a) . (b) & (c) @ (d) #
19. 19.🎯 Which CSS selector matches this element?
    <li class="red" id="intro">Hello</li> (a) #intro (b) #red (c) .box (d) #main
20. 20.🎯 Which element does the selector #hero style? (a) <div id="hero"> (b) <div class="hero"> (c) <div id="top"> (d) <span class="star">
21. 21.🎯 What kind of selector is #hero? (a) an element selector (b) a class selector (c) an id selector
22. 22.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) .star (b) #hero (c) .end (d) #end
24. 24.🎯 Which element does the selector .red style? (a) <h2 class="star"> (b) <h1 class="red"> (c) <h1 class="box"> (d) <h1 id="red">
25. 25.🎯 Which CSS selector matches this element?
    <div class="box" id="end">Hello</div> (a) div (b) .end (c) #box (d) span
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="red" id="intro">Hello</h1> (a) #main (b) h2 (c) #intro (d) #red
27. 27.🎯 Which element does the selector #intro style? (a) <h2 class="menu"> (b) <h1 id="intro"> (c) <h1 id="main"> (d) <h1 class="intro">
28. 28.🎯 Which element does the selector .star style? (a) <li id="star"> (b) <div class="note"> (c) <li class="star"> (d) <li class="menu">
29. 29.🎯 Which CSS selector matches this element?
    <li class="red" id="main">Hello</li> (a) #red (b) div (c) .red (d) .main
30. 30.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="logo">Hello</h1> (a) #menu (b) .note (c) #logo (d) #end
31. 31.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
32. 32.🎯 Which CSS selector matches this element?
    <div class="box" id="intro">Hello</div> (a) #box (b) .intro (c) span (d) .box
33. 33.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2> (a) #top (b) .hero (c) .note (d) .big
35. 35.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div> (a) .intro (b) #menu (c) #intro (d) .note
36. 36.True or false: .note is an element selector. (a) False (b) True
37. 37.True or false: body is an element selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <p class="box" id="intro">Hello</p> (a) #main (b) .intro (c) h1 (d) .box
39. 39.🎯 Which element does the selector .box style? (a) <h1 class="star"> (b) <h2 class="menu"> (c) <h1 id="box"> (d) <h1 class="box">
40. 40.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) .top (b) #note (c) #intro (d) .note

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