CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 121 · 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) a class selector (b) an id selector (c) an element selector
2. 2.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
3. 3.🎯 Which CSS selector matches this element?
   <h2 class="note" id="hero">Hello</h2> (a) #note (b) .note (c) li (d) .hero
4. 4.True or false: .note is a class selector. (a) True (b) False
5. 5.🎯 Which CSS selector matches this element?
   <div class="red" id="hero">Hello</div> (a) #red (b) span (c) #top (d) .red
6. 6.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
7. 7.🎯 What kind of selector is #hero? (a) an element selector (b) an id selector (c) a class selector
8. 8.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
9. 9.True or false: img is a class selector. (a) False (b) True
10. 10.🎯 Can many elements share the same class? (a) No (b) Yes
11. 11.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
12. 12.🎯 Which element does the selector h2 style? (a) <div class="note"> (b) <li> (c) <h2 class="note"> (d) <span id="intro">
13. 13.🎯 Which element does the selector li style? (a) <span class="note"> (b) <li class="note"> (c) <div> (d) <p id="main">
14. 14.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) .intro (b) h2 (c) #menu (d) h1
15. 15.🎯 Which CSS selector matches this element?
    <li class="red" id="hero">Hello</li> (a) div (b) #hero (c) .box (d) #top
16. 16.True or false: li is an id selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) .big (b) h2 (c) .note (d) #intro
18. 18.🎯 Which element does the selector div style? (a) <p class="note"> (b) <h1 id="top"> (c) <span> (d) <div class="note">
19. 19.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
20. 20.True or false: .card is a class selector. (a) True (b) False
21. 21.🎯 Which element does the selector #end style? (a) <li id="end"> (b) <li class="end"> (c) <div class="star"> (d) <li id="hero">
22. 22.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
23. 23.True or false: body is an element selector. (a) False (b) True
24. 24.🎯 Which element does the selector .note style? (a) <h2 id="note"> (b) <h2 class="big"> (c) <h2 class="note"> (d) <li class="red">
25. 25.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) h2 (b) #main (c) li (d) #star
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="star" id="end">Hello</h2> (a) h2 (b) .end (c) .menu (d) #hero
27. 27.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1> (a) .top (b) h1 (c) #intro (d) #red
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) #intro (b) .menu (c) h2 (d) .intro
29. 29.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
30. 30.True or false: #top is an id selector. (a) True (b) False
31. 31.True or false: h1 is a class selector. (a) True (b) False
32. 32.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="box" id="top">Hello</h2> (a) #intro (b) #box (c) .box (d) .star
34. 34.🎯 Which element does the selector #intro style? (a) <div id="main"> (b) <div class="intro"> (c) <span class="note"> (d) <div id="intro">
35. 35.🎯 Which element does the selector h1 style? (a) <li class="menu"> (b) <h2> (c) <h1 class="menu"> (d) <div id="main">
36. 36.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
37. 37.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1> (a) #red (b) #intro (c) #top (d) h2
38. 38.🎯 Which element does the selector .red style? (a) <h1 id="red"> (b) <h2 class="star"> (c) <h1 class="red"> (d) <h1 class="box">
39. 39.True or false: .big is a class selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <p class="red" id="main">Hello</p> (a) p (b) #logo (c) #red (d) .box

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