CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 530 · 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.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 2 (d) 5
2. 2.🎯 Which element does the selector .box style? (a) <h1 class="star"> (b) <h1 class="box"> (c) <h2 class="menu"> (d) <h1 id="box">
3. 3.🎯 Which CSS selector matches this element?
   <div class="note" id="intro">Hello</div> (a) #main (b) #note (c) .note (d) .big
4. 4.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
5. 5.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="main"> (c) <h1 class="big"> (d) <li class="big">
6. 6.🎯 Which element does the selector span style? (a) <p> (b) <h2 id="top"> (c) <span class="red"> (d) <h1 class="red">
7. 7.🎯 Which element does the selector #top style? (a) <p class="star"> (b) <span class="top"> (c) <span id="intro"> (d) <span id="top">
8. 8.True or false: #end is an id selector. (a) True (b) False
9. 9.🎯 Which CSS selector matches this element?
   <li class="star" id="end">Hello</li> (a) .end (b) .menu (c) #star (d) li
10. 10.True or false: li is a class selector. (a) False (b) True
11. 11.True or false: img is a class selector. (a) True (b) False
12. 12.🎯 Which CSS selector matches this element?
    <li class="big" id="logo">Hello</li> (a) #big (b) #logo (c) .logo (d) #end
13. 13.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1> (a) #hero (b) h1 (c) #big (d) .red
14. 14.True or false: #hero is a class selector. (a) False (b) True
15. 15.True or false: .big is a class selector. (a) False (b) True
16. 16.True or false: h1 is a class selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <h1 class="big" id="hero">Hello</h1> (a) .hero (b) h2 (c) #hero (d) #top
18. 18.🎯 Which sign starts an id selector? (a) # (b) & (c) . (d) @
19. 19.True or false: .star is an element selector. (a) False (b) True
20. 20.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
21. 21.🎯 Which element does the selector .red style? (a) <div class="star"> (b) <li id="red"> (c) <li class="red"> (d) <li class="box">
22. 22.🎯 Which CSS selector matches this element?
    <p class="star" id="intro">Hello</p> (a) .menu (b) .intro (c) #star (d) .star
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1> (a) #end (b) #big (c) h2 (d) h1
24. 24.🎯 Which element does the selector .note style? (a) <h2 class="big"> (b) <li class="red"> (c) <h2 class="note"> (d) <h2 id="note">
25. 25.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) .end (b) div (c) .red (d) li
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="box" id="intro">Hello</h1> (a) .intro (b) #intro (c) #box (d) #main
27. 27.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p> (a) #star (b) .logo (c) .menu (d) .star
28. 28.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) .hero (b) #big (c) li (d) #hero
29. 29.🎯 Which sign starts a class selector? (a) # (b) @ (c) & (d) .
30. 30.🎯 Which element does the selector .box style? (a) <h2 id="box"> (b) <h2 class="box"> (c) <li class="menu"> (d) <h2 class="star">
31. 31.🎯 Which CSS selector matches this element?
    <p class="big" id="main">Hello</p> (a) .main (b) .red (c) h1 (d) p
32. 32.🎯 Which element does the selector p style? (a) <p class="note"> (b) <h1> (c) <h2 class="note"> (d) <li id="end">
33. 33.🎯 Which CSS selector matches this element?
    <div class="big" id="end">Hello</div> (a) .end (b) span (c) .red (d) div
34. 34.True or false: .card is a class selector. (a) False (b) True
35. 35.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
36. 36.🎯 What kind of selector is #top? (a) a class selector (b) an element selector (c) an id selector
37. 37.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
38. 38.🎯 Which element does the selector .big style? (a) <h1 class="red"> (b) <h1 class="big"> (c) <h1 id="big"> (d) <h2 class="box">
39. 39.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
40. 40.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector

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