CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 647 · 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 a class selector. (a) False (b) True
3. 3.True or false: img is an element selector. (a) False (b) True
4. 4.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
5. 5.🎯 Which element does the selector span style? (a) <p> (b) <h1 class="red"> (c) <span class="red"> (d) <h2 id="top">
6. 6.🎯 Which sign starts a class selector? (a) @ (b) & (c) # (d) .
7. 7.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="end">Hello</h1> (a) #menu (b) .end (c) h1 (d) .note
8. 8.🎯 What kind of selector is body? (a) a class selector (b) an id selector (c) an element selector
9. 9.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
10. 10.🎯 Which element does the selector h1 style? (a) <div id="end"> (b) <h1 class="menu"> (c) <h2> (d) <li class="menu">
11. 11.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
12. 12.🎯 Can many elements share the same class? (a) No (b) Yes
13. 13.True or false: #top is an id selector. (a) True (b) False
14. 14.🎯 Which element does the selector li style? (a) <li class="star"> (b) <p id="hero"> (c) <div> (d) <span class="star">
15. 15.🎯 Which CSS selector matches this element?
    <div class="star" id="top">Hello</div> (a) #star (b) #intro (c) #top (d) span
16. 16.True or false: .card is an element selector. (a) False (b) True
17. 17.🎯 Which element does the selector #intro style? (a) <p class="menu"> (b) <span class="intro"> (c) <span id="main"> (d) <span id="intro">
18. 18.🎯 Which CSS selector matches this element?
    <h2 class="note" id="hero">Hello</h2> (a) #note (b) li (c) .note (d) #top
19. 19.🎯 Which CSS selector matches this element?
    <span class="box" id="logo">Hello</span> (a) #end (b) .star (c) #logo (d) #box
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="red" id="hero">Hello</h1> (a) #top (b) #hero (c) #red (d) h2
21. 21.🎯 Which element does the selector .menu style? (a) <h1 class="note"> (b) <h1 id="menu"> (c) <h1 class="menu"> (d) <h2 class="big">
22. 22.🎯 Which element does the selector .star style? (a) <span class="note"> (b) <div id="star"> (c) <div class="menu"> (d) <div class="star">
23. 23.🎯 Which CSS selector matches this element?
    <span class="star" id="intro">Hello</span> (a) #main (b) #intro (c) .menu (d) #star
24. 24.True or false: body is an id selector. (a) False (b) True
25. 25.🎯 Which CSS selector matches this element?
    <li class="box" id="intro">Hello</li> (a) #box (b) li (c) .intro (d) #main
26. 26.🎯 Which CSS selector matches this element?
    <p class="box" id="hero">Hello</p> (a) .star (b) h1 (c) .hero (d) .box
27. 27.🎯 Which CSS selector matches this element?
    <li class="note" id="logo">Hello</li> (a) .logo (b) div (c) .note (d) .big
28. 28.🎯 How many elements on a page should have the same id? (a) 1 (b) 2 (c) 5 (d) any number
29. 29.🎯 Which CSS selector matches this element?
    <h1 class="red" id="main">Hello</h1> (a) #red (b) h2 (c) .box (d) #main
30. 30.🎯 Which CSS selector matches this element?
    <p class="note" id="logo">Hello</p> (a) #end (b) #note (c) .big (d) p
31. 31.🎯 Which element does the selector h1 style? (a) <h1 class="box"> (b) <div id="end"> (c) <li class="box"> (d) <h2>
32. 32.🎯 Which CSS selector matches this element?
    <li class="star" id="top">Hello</li> (a) #star (b) #intro (c) li (d) .menu
33. 33.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
34. 34.🎯 Which element does the selector #hero style? (a) <div id="hero"> (b) <div class="hero"> (c) <span class="star"> (d) <div id="top">
35. 35.🎯 Which element does the selector #end style? (a) <li class="end"> (b) <div class="box"> (c) <li id="end"> (d) <li id="hero">
36. 36.🎯 Which element does the selector #top style? (a) <h1 id="intro"> (b) <h1 id="top"> (c) <h1 class="top"> (d) <h2 class="note">
37. 37.🎯 Which element does the selector #main style? (a) <h1 class="main"> (b) <h1 id="logo"> (c) <h1 id="main"> (d) <h2 class="box">
38. 38.True or false: #hero is an id selector. (a) False (b) True
39. 39.True or false: .note is an element selector. (a) False (b) True
40. 40.🎯 Which element does the selector .red style? (a) <h1 class="red"> (b) <h1 id="red"> (c) <h2 class="star"> (d) <h1 class="box">

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