CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 720 · 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 li? (a) a class selector (b) an id selector (c) an element selector
2. 2.🎯 Which CSS selector matches this element?
   <h2 class="big" id="main">Hello</h2> (a) #main (b) #big (c) .main (d) .red
3. 3.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
4. 4.🎯 Which CSS selector matches this element?
   <p class="star" id="main">Hello</p> (a) p (b) #logo (c) .main (d) #star
5. 5.🎯 Which element does the selector div style? (a) <p class="note"> (b) <div class="note"> (c) <h1 id="hero"> (d) <span>
6. 6.🎯 Which sign starts a class selector? (a) & (b) . (c) # (d) @
7. 7.True or false: .note is a class selector. (a) True (b) False
8. 8.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector
9. 9.True or false: #end is an id selector. (a) False (b) True
10. 10.🎯 Which element does the selector .note style? (a) <p id="note"> (b) <h1 class="red"> (c) <p class="note"> (d) <p class="big">
11. 11.True or false: p is an id selector. (a) False (b) True
12. 12.🎯 Which element does the selector p style? (a) <li id="logo"> (b) <h2 class="big"> (c) <p class="big"> (d) <h1>
13. 13.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
14. 14.True or false: #top is an id selector. (a) False (b) True
15. 15.True or false: .note is an id selector. (a) True (b) False
16. 16.🎯 Which element does the selector h2 style? (a) <span id="hero"> (b) <div class="red"> (c) <h2 class="red"> (d) <li>
17. 17.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) h1 (b) .red (c) .top (d) #top
18. 18.True or false: .big is a class selector. (a) False (b) True
19. 19.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="top">Hello</h2> (a) .note (b) #menu (c) .top (d) .menu
20. 20.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
21. 21.🎯 Which element does the selector li style? (a) <div> (b) <li class="red"> (c) <span class="red"> (d) <p id="hero">
22. 22.🎯 Which CSS selector matches this element?
    <div class="star" id="logo">Hello</div> (a) .menu (b) #star (c) #end (d) #logo
23. 23.🎯 Which CSS selector matches this element?
    <span class="menu" id="top">Hello</span> (a) #menu (b) #top (c) .note (d) p
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) .intro (b) #main (c) #intro (d) .big
25. 25.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1> (a) h2 (b) #big (c) #logo (d) .logo
26. 26.🎯 Which element does the selector h1 style? (a) <li class="star"> (b) <div id="end"> (c) <h1 class="star"> (d) <h2>
27. 27.🎯 Which CSS selector matches this element?
    <span class="big" id="hero">Hello</span> (a) .hero (b) #top (c) .big (d) #big
28. 28.🎯 Which element does the selector p style? (a) <h1> (b) <h2 class="menu"> (c) <p class="menu"> (d) <li id="end">
29. 29.🎯 Which CSS selector matches this element?
    <div class="red" id="hero">Hello</div> (a) span (b) .box (c) #top (d) .red
30. 30.🎯 Which element does the selector h1 style? (a) <h1 class="menu"> (b) <div id="logo"> (c) <li class="menu"> (d) <h2>
31. 31.🎯 Which element does the selector div style? (a) <div class="big"> (b) <p class="big"> (c) <span> (d) <h1 id="top">
32. 32.🎯 What kind of selector is img? (a) an id selector (b) an element selector (c) a class selector
33. 33.True or false: body is a class selector. (a) True (b) False
34. 34.🎯 What kind of selector is #top? (a) a class selector (b) an element selector (c) an id selector
35. 35.🎯 Which CSS selector matches this element?
    <li class="big" id="top">Hello</li> (a) #big (b) #intro (c) .top (d) li
36. 36.🎯 Which element does the selector div style? (a) <h1 id="end"> (b) <div class="box"> (c) <p class="box"> (d) <span>
37. 37.True or false: #logo is a class selector. (a) True (b) False
38. 38.🎯 Which element does the selector #top style? (a) <span id="intro"> (b) <span class="top"> (c) <p class="box"> (d) <span id="top">
39. 39.🎯 Which CSS selector matches this element?
    <span class="red" id="main">Hello</span> (a) .box (b) #logo (c) #red (d) .red
40. 40.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span> (a) .intro (b) #intro (c) #box (d) p

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