CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 528 · 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 .big? (a) an element selector (b) a class selector (c) an id selector
3. 3.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
4. 4.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
5. 5.🎯 Which CSS selector matches this element?
   <p class="big" id="logo">Hello</p> (a) .logo (b) p (c) #big (d) h1
6. 6.🎯 Which CSS selector matches this element?
   <p class="star" id="main">Hello</p> (a) #star (b) .main (c) .star (d) .menu
7. 7.True or false: p is an element selector. (a) False (b) True
8. 8.🎯 Which element does the selector #top style? (a) <li class="top"> (b) <li id="intro"> (c) <div class="menu"> (d) <li id="top">
9. 9.🎯 Which sign starts an id selector? (a) # (b) . (c) & (d) @
10. 10.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) .box (b) p (c) h1 (d) .intro
11. 11.🎯 Which element does the selector #top style? (a) <p id="top"> (b) <p id="intro"> (c) <p class="top"> (d) <h1 class="box">
12. 12.True or false: .big is an element selector. (a) True (b) False
13. 13.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
14. 14.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) 1 (d) any number
15. 15.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
16. 16.True or false: img is an element selector. (a) False (b) True
17. 17.True or false: .big is an id selector. (a) False (b) True
18. 18.🎯 Which element does the selector .big style? (a) <span class="box"> (b) <div class="big"> (c) <div class="red"> (d) <div id="big">
19. 19.🎯 Can many elements share the same class? (a) Yes (b) No
20. 20.🎯 Which CSS selector matches this element?
    <div class="note" id="hero">Hello</div> (a) span (b) #note (c) #hero (d) .hero
21. 21.🎯 Which element does the selector #hero style? (a) <p id="hero"> (b) <p class="hero"> (c) <p id="top"> (d) <h1 class="box">
22. 22.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) .big (b) #main (c) h1 (d) .intro
23. 23.True or false: .menu is a class selector. (a) False (b) True
24. 24.🎯 Which element does the selector #logo style? (a) <p id="logo"> (b) <h1 class="big"> (c) <p class="logo"> (d) <p id="end">
25. 25.True or false: .big is a class selector. (a) True (b) False
26. 26.True or false: p is a class selector. (a) False (b) True
27. 27.🎯 Which CSS selector matches this element?
    <li class="note" id="main">Hello</li> (a) #note (b) div (c) #main (d) .big
28. 28.🎯 Which element does the selector #intro style? (a) <p id="main"> (b) <h1 class="star"> (c) <p id="intro"> (d) <p class="intro">
29. 29.🎯 Which element does the selector #logo style? (a) <div class="box"> (b) <li class="logo"> (c) <li id="end"> (d) <li id="logo">
30. 30.🎯 Which element does the selector li style? (a) <div> (b) <p id="end"> (c) <span class="big"> (d) <li class="big">
31. 31.🎯 Which element does the selector li style? (a) <div> (b) <p id="main"> (c) <span class="note"> (d) <li class="note">
32. 32.🎯 Which element does the selector #intro style? (a) <span class="red"> (b) <div class="intro"> (c) <div id="main"> (d) <div id="intro">
33. 33.True or false: img is a class selector. (a) False (b) True
34. 34.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
35. 35.🎯 Which CSS selector matches this element?
    <span class="red" id="intro">Hello</span> (a) span (b) .box (c) p (d) .intro
36. 36.🎯 Which CSS selector matches this element?
    <h2 class="big" id="end">Hello</h2> (a) .red (b) li (c) #end (d) #big
37. 37.True or false: #logo is an id selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <div class="note" id="hero">Hello</div> (a) #top (b) span (c) .big (d) div
39. 39.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector
40. 40.🎯 Which element does the selector span style? (a) <p> (b) <span class="red"> (c) <h2 id="hero"> (d) <h1 class="red">

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