CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 126 · 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 .note? (a) an element selector (b) a class selector (c) an id selector
2. 2.🎯 Which sign starts an id selector? (a) & (b) @ (c) # (d) .
3. 3.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
4. 4.True or false: p is an id selector. (a) False (b) True
5. 5.🎯 Which CSS selector matches this element?
   <h2 class="red" id="main">Hello</h2> (a) li (b) .main (c) .box (d) h2
6. 6.🎯 Which CSS selector matches this element?
   <h1 class="star" id="top">Hello</h1> (a) .star (b) #star (c) h2 (d) .menu
7. 7.🎯 Which CSS selector matches this element?
   <h1 class="red" id="top">Hello</h1> (a) h2 (b) .top (c) #intro (d) h1
8. 8.🎯 Which element does the selector h2 style? (a) <span id="end"> (b) <div class="big"> (c) <li> (d) <h2 class="big">
9. 9.🎯 Which CSS selector matches this element?
   <li class="red" id="top">Hello</li> (a) #red (b) .box (c) #top (d) .top
10. 10.🎯 Which CSS selector matches this element?
    <h2 class="note" id="intro">Hello</h2> (a) .intro (b) #note (c) #intro (d) #main
11. 11.True or false: #main is an id selector. (a) False (b) True
12. 12.True or false: .note is a class selector. (a) True (b) False
13. 13.🎯 Which sign starts a class selector? (a) . (b) @ (c) # (d) &
14. 14.🎯 Which element does the selector #main style? (a) <div class="main"> (b) <span class="menu"> (c) <div id="logo"> (d) <div id="main">
15. 15.True or false: #main is a class selector. (a) True (b) False
16. 16.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
17. 17.🎯 Which element does the selector .star style? (a) <li class="star"> (b) <li class="menu"> (c) <div class="note"> (d) <li id="star">
18. 18.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="top">Hello</h2> (a) #intro (b) h2 (c) li (d) .note
19. 19.True or false: .note is an element selector. (a) False (b) True
20. 20.🎯 Which element does the selector .menu style? (a) <h1 id="menu"> (b) <h1 class="menu"> (c) <h2 class="big"> (d) <h1 class="note">
21. 21.True or false: .star is a class selector. (a) True (b) False
22. 22.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) div (b) #top (c) li (d) #note
23. 23.True or false: .card is an id selector. (a) True (b) False
24. 24.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
25. 25.🎯 Which element does the selector .big style? (a) <li id="big"> (b) <div class="box"> (c) <li class="big"> (d) <li class="red">
26. 26.True or false: body is an id selector. (a) True (b) False
27. 27.🎯 Which element does the selector h2 style? (a) <li> (b) <div class="note"> (c) <h2 class="note"> (d) <span id="hero">
28. 28.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
29. 29.🎯 Which element does the selector .big style? (a) <h1 id="big"> (b) <h1 class="big"> (c) <h1 class="red"> (d) <h2 class="box">
30. 30.🎯 Which CSS selector matches this element?
    <p class="box" id="hero">Hello</p> (a) .box (b) #top (c) #box (d) .hero
31. 31.🎯 Which CSS selector matches this element?
    <p class="big" id="hero">Hello</p> (a) #top (b) .big (c) .red (d) #big
32. 32.🎯 Which element does the selector p style? (a) <h2 class="note"> (b) <li id="intro"> (c) <p class="note"> (d) <h1>
33. 33.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
34. 34.🎯 Which element does the selector .big style? (a) <span class="red"> (b) <span id="big"> (c) <p class="box"> (d) <span class="big">
35. 35.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .main (b) .star (c) p (d) h1
36. 36.True or false: .star is an id selector. (a) False (b) True
37. 37.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
38. 38.🎯 Which CSS selector matches this element?
    <div class="star" id="main">Hello</div> (a) .main (b) #logo (c) .star (d) #star
39. 39.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
40. 40.🎯 Can many elements share the same class? (a) No (b) Yes

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