CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 68 · 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) 1 (c) any number (d) 2
2. 2.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
3. 3.True or false: img is an id selector. (a) True (b) False
4. 4.🎯 Which CSS selector matches this element?
   <li class="box" id="intro">Hello</li> (a) .star (b) #intro (c) .intro (d) div
5. 5.🎯 What kind of selector is .big? (a) a class selector (b) an id selector (c) an element selector
6. 6.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
7. 7.True or false: #end is a class selector. (a) False (b) True
8. 8.🎯 Which CSS selector matches this element?
   <li class="big" id="logo">Hello</li> (a) #big (b) .logo (c) li (d) .red
9. 9.🎯 What kind of selector is img? (a) an id selector (b) an element selector (c) a class selector
10. 10.🎯 Which sign starts a class selector? (a) # (b) & (c) @ (d) .
11. 11.True or false: .card is an id selector. (a) False (b) True
12. 12.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="end"> (c) <h1 class="note"> (d) <span class="note">
13. 13.🎯 Which element does the selector .red style? (a) <div class="box"> (b) <div class="red"> (c) <div id="red"> (d) <span class="star">
14. 14.🎯 Which element does the selector #logo style? (a) <span class="logo"> (b) <span id="logo"> (c) <span id="end"> (d) <p class="box">
15. 15.True or false: #main is an id selector. (a) True (b) False
16. 16.🎯 Which element does the selector .note style? (a) <h1 class="red"> (b) <p id="note"> (c) <p class="note"> (d) <p class="big">
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="big" id="logo">Hello</h2> (a) .red (b) #logo (c) .logo (d) #end
18. 18.True or false: li is an element selector. (a) False (b) True
19. 19.🎯 What kind of selector is #end? (a) a class selector (b) an id selector (c) an element selector
20. 20.🎯 Which CSS selector matches this element?
    <div class="note" id="top">Hello</div> (a) #intro (b) .big (c) .top (d) .note
21. 21.🎯 Which CSS selector matches this element?
    <h2 class="box" id="logo">Hello</h2> (a) .logo (b) #logo (c) #box (d) .star
22. 22.🎯 Which element does the selector #intro style? (a) <span class="intro"> (b) <p class="big"> (c) <span id="main"> (d) <span id="intro">
23. 23.🎯 Which element does the selector p style? (a) <h2 class="box"> (b) <li id="top"> (c) <p class="box"> (d) <h1>
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="note" id="main">Hello</h1> (a) .note (b) #note (c) h2 (d) .big
25. 25.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) .red (b) p (c) #main (d) span
26. 26.True or false: #main is an element selector. (a) True (b) False
27. 27.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) .note (b) #note (c) .intro (d) #main
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) h1 (b) .intro (c) #star (d) h2
29. 29.🎯 Can many elements share the same class? (a) Yes (b) No
30. 30.🎯 Which CSS selector matches this element?
    <p class="box" id="hero">Hello</p> (a) .hero (b) #box (c) p (d) h1
31. 31.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
32. 32.True or false: .menu is an id selector. (a) False (b) True
33. 33.🎯 Which element does the selector #top style? (a) <p id="top"> (b) <p class="top"> (c) <h1 class="big"> (d) <p id="intro">
34. 34.True or false: body is a class selector. (a) False (b) True
35. 35.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
36. 36.True or false: #hero is an id selector. (a) False (b) True
37. 37.True or false: #end is an id selector. (a) True (b) False
38. 38.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
39. 39.True or false: #top is an element selector. (a) True (b) False
40. 40.🎯 Which element does the selector #end style? (a) <h1 id="end"> (b) <h1 id="hero"> (c) <h1 class="end"> (d) <h2 class="box">

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