CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 199 · 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?
   <li class="box" id="hero">Hello</li> (a) #hero (b) #box (c) div (d) #top
2. 2.🎯 Which CSS selector matches this element?
   <p class="box" id="top">Hello</p> (a) .star (b) .box (c) h1 (d) #box
3. 3.🎯 Which element does the selector #intro style? (a) <div id="main"> (b) <div id="intro"> (c) <div class="intro"> (d) <span class="red">
4. 4.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
5. 5.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <p id="logo"> (c) <h1 class="red"> (d) <p class="logo">
6. 6.🎯 Which element does the selector #end style? (a) <li id="hero"> (b) <li id="end"> (c) <div class="big"> (d) <li class="end">
7. 7.🎯 Which CSS selector matches this element?
   <div class="red" id="logo">Hello</div> (a) #red (b) div (c) span (d) .box
8. 8.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
9. 9.True or false: .menu is a class selector. (a) False (b) True
10. 10.True or false: p is a class selector. (a) False (b) True
11. 11.🎯 Which element does the selector #hero style? (a) <p id="hero"> (b) <p class="hero"> (c) <p id="top"> (d) <h1 class="note">
12. 12.🎯 Which element does the selector #main style? (a) <h1 class="main"> (b) <h2 class="menu"> (c) <h1 id="logo"> (d) <h1 id="main">
13. 13.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="logo">Hello</h2> (a) .logo (b) #logo (c) #menu (d) li
15. 15.🎯 Which sign starts an id selector? (a) @ (b) & (c) . (d) #
16. 16.True or false: p is an id selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <span class="menu" id="main">Hello</span> (a) .menu (b) #menu (c) p (d) #logo
18. 18.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
19. 19.🎯 Can many elements share the same class? (a) No (b) Yes
20. 20.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
21. 21.🎯 Which element does the selector .note style? (a) <div id="note"> (b) <div class="note"> (c) <span class="red"> (d) <div class="big">
22. 22.🎯 Which CSS selector matches this element?
    <span class="star" id="hero">Hello</span> (a) #star (b) .hero (c) #top (d) #hero
23. 23.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .box (b) h1 (c) #logo (d) #box
24. 24.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
25. 25.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="main">Hello</h2> (a) .main (b) .note (c) #logo (d) #main
27. 27.🎯 Which element does the selector #main style? (a) <span class="main"> (b) <span id="logo"> (c) <p class="big"> (d) <span id="main">
28. 28.🎯 Which element does the selector h2 style? (a) <h2 class="note"> (b) <li> (c) <div class="note"> (d) <span id="main">
29. 29.🎯 Which element does the selector h2 style? (a) <span id="intro"> (b) <li> (c) <h2 class="menu"> (d) <div class="menu">
30. 30.True or false: .big is an id selector. (a) False (b) True
31. 31.True or false: h1 is an element selector. (a) True (b) False
32. 32.True or false: #end is an element selector. (a) True (b) False
33. 33.True or false: .note is a class selector. (a) True (b) False
34. 34.🎯 Which sign starts a class selector? (a) & (b) # (c) . (d) @
35. 35.True or false: .star is a class selector. (a) False (b) True
36. 36.🎯 Which CSS selector matches this element?
    <div class="big" id="main">Hello</div> (a) div (b) #logo (c) #big (d) .red
37. 37.True or false: #main is a class selector. (a) True (b) False
38. 38.True or false: #end is an id selector. (a) False (b) True
39. 39.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
40. 40.🎯 Which element does the selector p style? (a) <p class="box"> (b) <h1> (c) <li id="intro"> (d) <h2 class="box">

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