CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 827 · 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 sign starts an id selector? (a) . (b) @ (c) & (d) #
2. 2.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
3. 3.True or false: #end is an id selector. (a) False (b) True
4. 4.🎯 Which CSS selector matches this element?
   <h2 class="red" id="top">Hello</h2> (a) #intro (b) .box (c) .red (d) .top
5. 5.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
6. 6.🎯 What kind of selector is li? (a) an element selector (b) an id selector (c) a class selector
7. 7.🎯 Which CSS selector matches this element?
   <li class="star" id="top">Hello</li> (a) div (b) .menu (c) #intro (d) #top
8. 8.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
9. 9.True or false: li is an id selector. (a) True (b) False
10. 10.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
11. 11.🎯 Which CSS selector matches this element?
    <span class="box" id="hero">Hello</span> (a) #box (b) #top (c) .star (d) #hero
12. 12.🎯 Which CSS selector matches this element?
    <div class="star" id="top">Hello</div> (a) .menu (b) #star (c) div (d) #intro
13. 13.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
14. 14.🎯 Can many elements share the same class? (a) Yes (b) No
15. 15.🎯 Which element does the selector .red style? (a) <h1 class="box"> (b) <h2 class="star"> (c) <h1 class="red"> (d) <h1 id="red">
16. 16.True or false: h1 is a class selector. (a) False (b) True
17. 17.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) #main (b) h1 (c) .star (d) #logo
18. 18.🎯 Which element does the selector h2 style? (a) <li> (b) <span id="end"> (c) <div class="menu"> (d) <h2 class="menu">
19. 19.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
20. 20.🎯 Which sign starts a class selector? (a) # (b) @ (c) & (d) .
21. 21.🎯 Which element does the selector .menu style? (a) <h1 class="menu"> (b) <h2 class="big"> (c) <h1 id="menu"> (d) <h1 class="note">
22. 22.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1> (a) .red (b) h1 (c) #big (d) .end
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="box" id="logo">Hello</h1> (a) #end (b) h2 (c) h1 (d) .logo
24. 24.🎯 Which element does the selector #main style? (a) <p class="note"> (b) <span id="main"> (c) <span id="logo"> (d) <span class="main">
25. 25.🎯 Which CSS selector matches this element?
    <li class="big" id="top">Hello</li> (a) #intro (b) .big (c) .top (d) .red
26. 26.🎯 Which CSS selector matches this element?
    <span class="box" id="hero">Hello</span> (a) .hero (b) span (c) #top (d) #box
27. 27.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) #big (b) #top (c) #hero (d) .red
28. 28.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
29. 29.True or false: #hero is an id selector. (a) False (b) True
30. 30.🎯 Which CSS selector matches this element?
    <h2 class="box" id="logo">Hello</h2> (a) #end (b) .logo (c) .box (d) .star
31. 31.🎯 Which element does the selector .note style? (a) <div class="note"> (b) <div id="note"> (c) <span class="red"> (d) <div class="big">
32. 32.🎯 Which element does the selector .note style? (a) <h1 class="note"> (b) <h1 id="note"> (c) <h1 class="big"> (d) <h2 class="red">
33. 33.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
34. 34.True or false: .menu is an element selector. (a) True (b) False
35. 35.🎯 Which element does the selector h1 style? (a) <li class="red"> (b) <h1 class="red"> (c) <h2> (d) <div id="hero">
36. 36.🎯 How many elements on a page should have the same id? (a) any number (b) 2 (c) 1 (d) 5
37. 37.🎯 Which CSS selector matches this element?
    <li class="big" id="main">Hello</li> (a) .main (b) #logo (c) .big (d) .red
38. 38.🎯 Which element does the selector p style? (a) <li id="logo"> (b) <p class="note"> (c) <h1> (d) <h2 class="note">
39. 39.🎯 Which element does the selector .note style? (a) <p class="note"> (b) <h1 class="red"> (c) <p id="note"> (d) <p class="big">
40. 40.True or false: .big is a class selector. (a) False (b) True

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