CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 100 · 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 element does the selector .box style? (a) <p class="star"> (b) <h1 class="menu"> (c) <p class="box"> (d) <p id="box">
2. 2.True or false: .menu is a class selector. (a) False (b) True
3. 3.🎯 Which element does the selector p style? (a) <p class="red"> (b) <h1> (c) <h2 class="red"> (d) <li id="intro">
4. 4.🎯 Which CSS selector matches this element?
   <h2 class="star" id="top">Hello</h2> (a) #top (b) .menu (c) #star (d) #intro
5. 5.🎯 Which element does the selector #main style? (a) <p class="main"> (b) <p id="main"> (c) <p id="logo"> (d) <h1 class="star">
6. 6.🎯 What kind of selector is .star? (a) an element selector (b) a class selector (c) an id selector
7. 7.🎯 Can many elements share the same class? (a) Yes (b) No
8. 8.🎯 Which CSS selector matches this element?
   <p class="red" id="logo">Hello</p> (a) h1 (b) #logo (c) #end (d) .logo
9. 9.🎯 Which element does the selector #hero style? (a) <p class="note"> (b) <span id="top"> (c) <span class="hero"> (d) <span id="hero">
10. 10.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
11. 11.🎯 Which element does the selector #intro style? (a) <span class="box"> (b) <div class="intro"> (c) <div id="main"> (d) <div id="intro">
12. 12.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
13. 13.True or false: .card is a class selector. (a) False (b) True
14. 14.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) #hero (b) .big (c) .end (d) .red
15. 15.🎯 Which element does the selector #intro style? (a) <li class="intro"> (b) <li id="main"> (c) <div class="star"> (d) <li id="intro">
16. 16.🎯 Which CSS selector matches this element?
    <div class="box" id="hero">Hello</div> (a) span (b) #box (c) .hero (d) .box
17. 17.🎯 What kind of selector is #main? (a) an id selector (b) an element selector (c) a class selector
18. 18.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) h1 (b) #top (c) .note (d) .hero
19. 19.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
20. 20.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
21. 21.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span> (a) #box (b) .main (c) p (d) .box
22. 22.True or false: .card is an id selector. (a) False (b) True
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) #note (b) .note (c) h2 (d) .intro
24. 24.🎯 Which sign starts an id selector? (a) @ (b) . (c) # (d) &
25. 25.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) #intro (b) .intro (c) p (d) #big
26. 26.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p> (a) .intro (b) .menu (c) p (d) h1
27. 27.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) #box (b) .box (c) .end (d) h2
28. 28.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
29. 29.🎯 Which CSS selector matches this element?
    <p class="star" id="hero">Hello</p> (a) #hero (b) #top (c) h1 (d) #star
30. 30.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) .box (b) #box (c) li (d) .main
31. 31.🎯 Which sign starts a class selector? (a) # (b) & (c) @ (d) .
32. 32.🎯 Which CSS selector matches this element?
    <div class="note" id="hero">Hello</div> (a) .note (b) .hero (c) .big (d) #note
33. 33.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
34. 34.True or false: img is an element selector. (a) True (b) False
35. 35.True or false: .star is an element selector. (a) True (b) False
36. 36.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2> (a) .menu (b) #star (c) li (d) #hero
37. 37.🎯 Which element does the selector span style? (a) <h2 id="intro"> (b) <span class="big"> (c) <p> (d) <h1 class="big">
38. 38.True or false: #hero is an id selector. (a) True (b) False
39. 39.True or false: body is an element selector. (a) False (b) True
40. 40.🎯 Which element does the selector .big style? (a) <span class="box"> (b) <div id="big"> (c) <div class="red"> (d) <div class="big">

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