CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 251 · 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 an id selector? (a) & (b) # (c) . (d) @
2. 2.True or false: body is an element selector. (a) False (b) True
3. 3.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="box" id="main">Hello</h1> (a) #box (b) .box (c) .main (d) #logo
5. 5.🎯 Which sign starts a class selector? (a) # (b) . (c) & (d) @
6. 6.True or false: p is a class selector. (a) True (b) False
7. 7.🎯 Which element does the selector .star style? (a) <h2 class="menu"> (b) <h2 id="star"> (c) <h2 class="star"> (d) <li class="note">
8. 8.🎯 Which element does the selector div style? (a) <h1 id="hero"> (b) <div class="star"> (c) <span> (d) <p class="star">
9. 9.🎯 Which element does the selector .big style? (a) <span class="red"> (b) <p class="box"> (c) <span class="big"> (d) <span id="big">
10. 10.🎯 Can many elements share the same class? (a) Yes (b) No
11. 11.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) #top (b) .red (c) div (d) #hero
12. 12.🎯 How many elements on a page should have the same id? (a) 1 (b) 5 (c) any number (d) 2
13. 13.True or false: .menu is a class selector. (a) True (b) False
14. 14.True or false: .card is a class selector. (a) False (b) True
15. 15.🎯 Which CSS selector matches this element?
    <li class="big" id="main">Hello</li> (a) li (b) .red (c) div (d) #big
16. 16.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) #main (b) .box (c) #red (d) #intro
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2> (a) #star (b) .hero (c) #hero (d) .menu
18. 18.True or false: h1 is a class selector. (a) True (b) False
19. 19.🎯 Which element does the selector h2 style? (a) <li> (b) <h2 class="menu"> (c) <span id="main"> (d) <div class="menu">
20. 20.True or false: body is an id selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) .top (b) #note (c) h1 (d) #top
22. 22.True or false: #end is a class selector. (a) False (b) True
23. 23.🎯 Which CSS selector matches this element?
    <span class="big" id="main">Hello</span> (a) .big (b) .main (c) #logo (d) p
24. 24.🎯 Which element does the selector #logo style? (a) <h1 class="logo"> (b) <h1 id="logo"> (c) <h2 class="big"> (d) <h1 id="end">
25. 25.🎯 Which CSS selector matches this element?
    <li class="note" id="main">Hello</li> (a) #logo (b) #main (c) div (d) #note
26. 26.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
27. 27.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
28. 28.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
29. 29.🎯 Which element does the selector #intro style? (a) <span id="main"> (b) <span class="intro"> (c) <span id="intro"> (d) <p class="menu">
30. 30.True or false: #top is a class selector. (a) True (b) False
31. 31.True or false: h1 is an element selector. (a) False (b) True
32. 32.True or false: #logo is an id selector. (a) False (b) True
33. 33.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) .intro (b) #big (c) p (d) #main
34. 34.🎯 Which element does the selector .red style? (a) <li id="red"> (b) <div class="star"> (c) <li class="red"> (d) <li class="box">
35. 35.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
36. 36.🎯 Which element does the selector #logo style? (a) <span id="end"> (b) <span class="logo"> (c) <span id="logo"> (d) <p class="menu">
37. 37.🎯 Which CSS selector matches this element?
    <span class="big" id="logo">Hello</span> (a) #end (b) .big (c) .logo (d) #big
38. 38.True or false: .star is a class selector. (a) False (b) True
39. 39.True or false: #main is an element selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="note" id="logo">Hello</h1> (a) .note (b) #end (c) h2 (d) .logo

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