CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 107 · 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.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
2. 2.🎯 Which sign starts a class selector? (a) @ (b) . (c) # (d) &
3. 3.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
4. 4.True or false: #main is an element selector. (a) False (b) True
5. 5.🎯 Which element does the selector h1 style? (a) <h1 class="note"> (b) <li class="note"> (c) <div id="hero"> (d) <h2>
6. 6.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
7. 7.🎯 Which sign starts an id selector? (a) & (b) . (c) # (d) @
8. 8.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
9. 9.True or false: h1 is an id selector. (a) True (b) False
10. 10.🎯 Which element does the selector h2 style? (a) <div class="note"> (b) <li> (c) <h2 class="note"> (d) <span id="top">
11. 11.True or false: .card is an id selector. (a) True (b) False
12. 12.True or false: .note is an element selector. (a) True (b) False
13. 13.True or false: body is an element selector. (a) False (b) True
14. 14.True or false: img is a class selector. (a) True (b) False
15. 15.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
16. 16.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) p (b) .red (c) h1 (d) #main
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2> (a) #hero (b) h2 (c) .end (d) .menu
18. 18.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) #big (b) #main (c) #intro (d) .red
19. 19.🎯 What kind of selector is .card? (a) an id selector (b) a class selector (c) an element selector
20. 20.🎯 Can many elements share the same class? (a) No (b) Yes
21. 21.🎯 Which CSS selector matches this element?
    <span class="big" id="hero">Hello</span> (a) #top (b) #big (c) span (d) .red
22. 22.True or false: #hero is a class selector. (a) False (b) True
23. 23.True or false: .menu is an id selector. (a) True (b) False
24. 24.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
25. 25.True or false: .star is an id selector. (a) True (b) False
26. 26.🎯 Which element does the selector .red style? (a) <div class="box"> (b) <div id="red"> (c) <span class="star"> (d) <div class="red">
27. 27.True or false: li is an element selector. (a) False (b) True
28. 28.🎯 Which element does the selector .note style? (a) <h1 id="note"> (b) <h2 class="red"> (c) <h1 class="big"> (d) <h1 class="note">
29. 29.🎯 Which CSS selector matches this element?
    <div class="red" id="end">Hello</div> (a) span (b) .end (c) div (d) .box
30. 30.🎯 Which CSS selector matches this element?
    <li class="red" id="end">Hello</li> (a) .end (b) div (c) #end (d) #hero
31. 31.🎯 Which CSS selector matches this element?
    <p class="big" id="main">Hello</p> (a) .red (b) #main (c) .main (d) #logo
32. 32.🎯 Which element does the selector #intro style? (a) <h1 id="main"> (b) <h1 class="intro"> (c) <h2 class="star"> (d) <h1 id="intro">
33. 33.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p> (a) .star (b) .menu (c) #intro (d) #star
34. 34.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) .box (b) #red (c) #main (d) #intro
35. 35.🎯 What kind of selector is #top? (a) an element selector (b) an id selector (c) a class selector
36. 36.🎯 What kind of selector is .star? (a) an element selector (b) a class selector (c) an id selector
37. 37.🎯 Which element does the selector #hero style? (a) <div id="hero"> (b) <div id="top"> (c) <div class="hero"> (d) <span class="menu">
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="note" id="logo">Hello</h1> (a) #note (b) h1 (c) .big (d) h2
39. 39.🎯 Which CSS selector matches this element?
    <p class="box" id="top">Hello</p> (a) #box (b) .star (c) #intro (d) p
40. 40.🎯 Which element does the selector #intro style? (a) <li class="box"> (b) <h2 id="main"> (c) <h2 id="intro"> (d) <h2 class="intro">

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