CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 908 · 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 #main? (a) an id selector (b) an element selector (c) a class selector
2. 2.🎯 Which sign starts a class selector? (a) @ (b) . (c) & (d) #
3. 3.🎯 Which CSS selector matches this element?
   <li class="star" id="end">Hello</li> (a) #star (b) li (c) div (d) #hero
4. 4.🎯 Which CSS selector matches this element?
   <div class="red" id="end">Hello</div> (a) #end (b) #hero (c) span (d) #red
5. 5.🎯 Which element does the selector .menu style? (a) <li id="menu"> (b) <li class="note"> (c) <div class="big"> (d) <li class="menu">
6. 6.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
7. 7.🎯 Which CSS selector matches this element?
   <li class="note" id="top">Hello</li> (a) div (b) #intro (c) #top (d) .top
8. 8.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
9. 9.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="hero">Hello</h1> (a) h2 (b) #menu (c) .hero (d) #hero
10. 10.🎯 Can many elements share the same class? (a) No (b) Yes
11. 11.🎯 Which CSS selector matches this element?
    <p class="big" id="logo">Hello</p> (a) .logo (b) h1 (c) .red (d) p
12. 12.🎯 Which element does the selector .big style? (a) <span id="big"> (b) <span class="red"> (c) <span class="big"> (d) <p class="box">
13. 13.🎯 Which CSS selector matches this element?
    <li class="star" id="hero">Hello</li> (a) li (b) #star (c) div (d) #top
14. 14.🎯 What kind of selector is li? (a) an element selector (b) an id selector (c) a class selector
15. 15.True or false: .big is an id selector. (a) False (b) True
16. 16.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) .hero (b) #hero (c) li (d) #big
18. 18.True or false: #top is an id selector. (a) True (b) False
19. 19.🎯 What kind of selector is .star? (a) a class selector (b) an id selector (c) an element selector
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="star" id="top">Hello</h1> (a) #intro (b) .menu (c) #star (d) h1
21. 21.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
22. 22.True or false: .star is a class selector. (a) True (b) False
23. 23.True or false: .card is an element selector. (a) False (b) True
24. 24.🎯 Which CSS selector matches this element?
    <p class="star" id="hero">Hello</p> (a) h1 (b) .star (c) #star (d) #top
25. 25.🎯 Which CSS selector matches this element?
    <h1 class="red" id="hero">Hello</h1> (a) #red (b) .hero (c) h1 (d) #top
26. 26.True or false: #main is an id selector. (a) True (b) False
27. 27.True or false: body is an element selector. (a) False (b) True
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) #hero (b) #end (c) #box (d) .star
29. 29.🎯 Which CSS selector matches this element?
    <p class="box" id="hero">Hello</p> (a) #box (b) .hero (c) p (d) #top
30. 30.🎯 Which element does the selector #end style? (a) <span id="end"> (b) <p class="note"> (c) <span id="hero"> (d) <span class="end">
31. 31.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p> (a) .logo (b) p (c) #star (d) #end
32. 32.True or false: .card is a class selector. (a) True (b) False
33. 33.🎯 Which element does the selector .big style? (a) <p class="big"> (b) <h1 class="box"> (c) <p class="red"> (d) <p id="big">
34. 34.🎯 Which element does the selector h1 style? (a) <h1 class="red"> (b) <div id="hero"> (c) <h2> (d) <li class="red">
35. 35.🎯 What kind of selector is .card? (a) a class selector (b) an element selector (c) an id selector
36. 36.🎯 Which element does the selector #intro style? (a) <span class="intro"> (b) <span id="intro"> (c) <p class="menu"> (d) <span id="main">
37. 37.🎯 Which CSS selector matches this element?
    <div class="big" id="intro">Hello</div> (a) span (b) #main (c) .intro (d) div
38. 38.🎯 Which element does the selector h1 style? (a) <li class="menu"> (b) <div id="intro"> (c) <h1 class="menu"> (d) <h2>
39. 39.🎯 Which element does the selector .box style? (a) <p class="star"> (b) <h1 class="menu"> (c) <p id="box"> (d) <p class="box">
40. 40.True or false: p is an id selector. (a) False (b) True

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