CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 849 · 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.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) 1 (d) any number
2. 2.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
3. 3.🎯 Which element does the selector h1 style? (a) <li class="menu"> (b) <h1 class="menu"> (c) <div id="top"> (d) <h2>
4. 4.🎯 Which CSS selector matches this element?
   <li class="box" id="intro">Hello</li> (a) #main (b) #box (c) div (d) li
5. 5.🎯 Which element does the selector #intro style? (a) <p class="intro"> (b) <p id="intro"> (c) <p id="main"> (d) <h1 class="note">
6. 6.🎯 Which CSS selector matches this element?
   <span class="big" id="end">Hello</span> (a) .big (b) .red (c) #hero (d) #big
7. 7.🎯 Which CSS selector matches this element?
   <p class="red" id="main">Hello</p> (a) h1 (b) #logo (c) p (d) .main
8. 8.🎯 What kind of selector is .big? (a) a class selector (b) an id selector (c) an element selector
9. 9.🎯 Which element does the selector #intro style? (a) <p class="box"> (b) <span id="main"> (c) <span id="intro"> (d) <span class="intro">
10. 10.🎯 Which sign starts a class selector? (a) & (b) @ (c) # (d) .
11. 11.🎯 Which CSS selector matches this element?
    <p class="menu" id="end">Hello</p> (a) #hero (b) .note (c) .end (d) .menu
12. 12.🎯 Which element does the selector #main style? (a) <li class="main"> (b) <div class="star"> (c) <li id="main"> (d) <li id="logo">
13. 13.True or false: #end is an element selector. (a) False (b) True
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="note" id="intro">Hello</h2> (a) #main (b) .intro (c) li (d) #intro
15. 15.🎯 Can many elements share the same class? (a) No (b) Yes
16. 16.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) #logo (b) .note (c) #menu (d) .menu
17. 17.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) #big (b) .top (c) .red (d) h1
18. 18.🎯 Which CSS selector matches this element?
    <h2 class="red" id="top">Hello</h2> (a) li (b) .red (c) .box (d) .top
19. 19.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
20. 20.🎯 Which CSS selector matches this element?
    <p class="box" id="intro">Hello</p> (a) .box (b) #main (c) h1 (d) .star
21. 21.True or false: #main is an element selector. (a) True (b) False
22. 22.🎯 Which element does the selector #hero style? (a) <div id="hero"> (b) <span class="menu"> (c) <div id="top"> (d) <div class="hero">
23. 23.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
24. 24.True or false: li is an id selector. (a) True (b) False
25. 25.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) .note (b) div (c) #menu (d) .end
26. 26.🎯 Which element does the selector p style? (a) <h2 class="note"> (b) <li id="end"> (c) <p class="note"> (d) <h1>
27. 27.True or false: #logo is a class selector. (a) False (b) True
28. 28.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
29. 29.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
30. 30.🎯 Which CSS selector matches this element?
    <h1 class="star" id="hero">Hello</h1> (a) .menu (b) #hero (c) #star (d) #top
31. 31.True or false: .menu is a class selector. (a) True (b) False
32. 32.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li> (a) li (b) div (c) .logo (d) #menu
33. 33.🎯 Which element does the selector .box style? (a) <li class="menu"> (b) <h2 class="star"> (c) <h2 id="box"> (d) <h2 class="box">
34. 34.True or false: li is an element selector. (a) False (b) True
35. 35.🎯 Which CSS selector matches this element?
    <h1 class="note" id="logo">Hello</h1> (a) #logo (b) .logo (c) h2 (d) #note
36. 36.True or false: .note is a class selector. (a) False (b) True
37. 37.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) .top (b) #top (c) .big (d) #note
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) .note (b) #note (c) .big (d) h2
39. 39.🎯 Which CSS selector matches this element?
    <li class="menu" id="hero">Hello</li> (a) .note (b) .hero (c) div (d) li
40. 40.🎯 Which CSS selector matches this element?
    <span class="menu" id="hero">Hello</span> (a) .hero (b) #hero (c) #menu (d) .note

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