CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 420 · 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) <h2 class="red"> (b) <h1 class="big"> (c) <h1 id="note"> (d) <h1 class="note">
2. 2.True or false: #main is an element selector. (a) False (b) True
3. 3.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
4. 4.True or false: li is a class selector. (a) False (b) True
5. 5.🎯 Which element does the selector #hero style? (a) <h1 class="hero"> (b) <h1 id="top"> (c) <h2 class="red"> (d) <h1 id="hero">
6. 6.🎯 Which CSS selector matches this element?
   <li class="note" id="hero">Hello</li> (a) #note (b) li (c) .big (d) #top
7. 7.🎯 Which element does the selector span style? (a) <h1 class="red"> (b) <span class="red"> (c) <h2 id="logo"> (d) <p>
8. 8.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
9. 9.True or false: body is an element selector. (a) False (b) True
10. 10.True or false: li is an id selector. (a) False (b) True
11. 11.🎯 Can many elements share the same class? (a) Yes (b) No
12. 12.🎯 Which sign starts an id selector? (a) @ (b) . (c) & (d) #
13. 13.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) .intro (b) #star (c) #main (d) h1
14. 14.True or false: img is an element selector. (a) False (b) True
15. 15.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
16. 16.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) #hero (b) .big (c) #top (d) .hero
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2> (a) .menu (b) #end (c) #hero (d) #star
18. 18.🎯 Which element does the selector #logo style? (a) <h1 class="logo"> (b) <h2 class="big"> (c) <h1 id="logo"> (d) <h1 id="end">
19. 19.🎯 Which CSS selector matches this element?
    <h2 class="red" id="intro">Hello</h2> (a) .box (b) .intro (c) #main (d) h2
20. 20.🎯 Which CSS selector matches this element?
    <span class="box" id="hero">Hello</span> (a) .star (b) #hero (c) #box (d) .hero
21. 21.True or false: #main is a class selector. (a) False (b) True
22. 22.True or false: #top is an id selector. (a) True (b) False
23. 23.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
24. 24.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 5 (d) 1
25. 25.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) p (b) .top (c) #note (d) #intro
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) h2 (b) .logo (c) #end (d) .menu
27. 27.🎯 Which element does the selector #logo style? (a) <li id="end"> (b) <li class="logo"> (c) <li id="logo"> (d) <div class="box">
28. 28.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
29. 29.True or false: .star is an id selector. (a) True (b) False
30. 30.🎯 Which element does the selector #main style? (a) <h1 class="main"> (b) <h2 class="star"> (c) <h1 id="logo"> (d) <h1 id="main">
31. 31.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="note"> (c) <div id="main"> (d) <li class="note">
32. 32.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
33. 33.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <li class="menu"> (c) <h2 class="top"> (d) <h2 id="top">
34. 34.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) #box (b) .star (c) .box (d) #hero
35. 35.True or false: #end is an id selector. (a) True (b) False
36. 36.🎯 Which CSS selector matches this element?
    <h1 class="big" id="hero">Hello</h1> (a) .hero (b) #top (c) .red (d) h1
37. 37.🎯 Which CSS selector matches this element?
    <li class="note" id="intro">Hello</li> (a) div (b) li (c) #main (d) #note
38. 38.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="menu"> (c) <li class="menu"> (d) <div id="main">
39. 39.🎯 Which element does the selector .menu style? (a) <p id="menu"> (b) <h1 class="big"> (c) <p class="note"> (d) <p class="menu">
40. 40.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector

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