CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 363 · 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 a class selector? (a) # (b) . (c) @ (d) &
2. 2.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
3. 3.🎯 Can many elements share the same class? (a) Yes (b) No
4. 4.True or false: .menu is an element selector. (a) True (b) False
5. 5.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
6. 6.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="intro">Hello</h2> (a) #menu (b) #intro (c) li (d) #main
7. 7.True or false: li is a class selector. (a) True (b) False
8. 8.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
9. 9.True or false: #logo is a class selector. (a) True (b) False
10. 10.🎯 What kind of selector is #hero? (a) an id selector (b) an element selector (c) a class selector
11. 11.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h1 id="red"> (c) <h1 class="box"> (d) <h2 class="star">
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="box" id="hero">Hello</h1> (a) .box (b) h2 (c) .hero (d) #box
13. 13.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
14. 14.True or false: #main is an element selector. (a) True (b) False
15. 15.True or false: p is an element selector. (a) False (b) True
16. 16.True or false: img is a class selector. (a) False (b) True
17. 17.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
18. 18.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
19. 19.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) #top (b) .big (c) #big (d) .hero
20. 20.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) p (b) .intro (c) #big (d) h1
21. 21.🎯 Which sign starts an id selector? (a) @ (b) & (c) # (d) .
22. 22.True or false: body is an element selector. (a) False (b) True
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) h1 (b) #note (c) .big (d) .top
24. 24.🎯 Which element does the selector .note style? (a) <h2 class="red"> (b) <h1 class="note"> (c) <h1 id="note"> (d) <h1 class="big">
25. 25.True or false: .card is an id selector. (a) False (b) True
26. 26.🎯 Which element does the selector .menu style? (a) <div id="menu"> (b) <div class="note"> (c) <div class="menu"> (d) <span class="big">
27. 27.True or false: .star is a class selector. (a) False (b) True
28. 28.🎯 Which element does the selector #main style? (a) <p id="logo"> (b) <p class="main"> (c) <p id="main"> (d) <h1 class="menu">
29. 29.🎯 Which element does the selector #intro style? (a) <p class="intro"> (b) <p id="main"> (c) <p id="intro"> (d) <h1 class="box">
30. 30.🎯 Which element does the selector #top style? (a) <div id="intro"> (b) <div id="top"> (c) <span class="note"> (d) <div class="top">
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="star" id="top">Hello</h1> (a) h1 (b) #intro (c) .top (d) #star
32. 32.🎯 Which CSS selector matches this element?
    <div class="big" id="intro">Hello</div> (a) #big (b) #intro (c) #main (d) .intro
33. 33.🎯 Which element does the selector #main style? (a) <h1 id="logo"> (b) <h2 class="star"> (c) <h1 class="main"> (d) <h1 id="main">
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="red" id="main">Hello</h2> (a) .main (b) #main (c) #logo (d) li
35. 35.True or false: #hero is an id selector. (a) True (b) False
36. 36.🎯 Which CSS selector matches this element?
    <span class="red" id="logo">Hello</span> (a) span (b) .box (c) p (d) #red
37. 37.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
38. 38.True or false: .note is a class selector. (a) False (b) True
39. 39.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
40. 40.True or false: .menu is an id selector. (a) True (b) False

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