CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 510 · 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 CSS selector matches this element?
   <p class="box" id="top">Hello</p> (a) #box (b) .star (c) #intro (d) .box
2. 2.🎯 Which CSS selector matches this element?
   <li class="box" id="hero">Hello</li> (a) #hero (b) #box (c) div (d) #top
3. 3.True or false: .star is an id selector. (a) False (b) True
4. 4.🎯 Which element does the selector h1 style? (a) <li class="big"> (b) <h1 class="big"> (c) <div id="main"> (d) <h2>
5. 5.🎯 Which element does the selector #main style? (a) <h1 id="logo"> (b) <h1 id="main"> (c) <h1 class="main"> (d) <h2 class="big">
6. 6.🎯 Which element does the selector .big style? (a) <div class="box"> (b) <li id="big"> (c) <li class="big"> (d) <li class="red">
7. 7.🎯 Which CSS selector matches this element?
   <li class="red" id="top">Hello</li> (a) #intro (b) .top (c) #red (d) .red
8. 8.🎯 Which sign starts an id selector? (a) & (b) . (c) # (d) @
9. 9.🎯 Which CSS selector matches this element?
   <li class="big" id="top">Hello</li> (a) #top (b) .red (c) .top (d) #intro
10. 10.🎯 What kind of selector is p? (a) an element selector (b) an id selector (c) a class selector
11. 11.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
12. 12.🎯 Which element does the selector #logo style? (a) <h2 class="logo"> (b) <h2 id="end"> (c) <li class="big"> (d) <h2 id="logo">
13. 13.🎯 Which CSS selector matches this element?
    <h2 class="red" id="end">Hello</h2> (a) li (b) #end (c) .box (d) #red
14. 14.True or false: .big is an id selector. (a) True (b) False
15. 15.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
16. 16.🎯 Which CSS selector matches this element?
    <li class="note" id="logo">Hello</li> (a) #end (b) div (c) .logo (d) #logo
17. 17.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
18. 18.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
19. 19.True or false: .menu is an id selector. (a) True (b) False
20. 20.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span> (a) span (b) #star (c) p (d) .end
21. 21.🎯 What kind of selector is .note? (a) an id selector (b) an element selector (c) a class selector
22. 22.🎯 Which element does the selector #hero style? (a) <h2 id="hero"> (b) <h2 id="top"> (c) <h2 class="hero"> (d) <li class="star">
23. 23.🎯 Which element does the selector .note style? (a) <h1 class="note"> (b) <h1 class="big"> (c) <h2 class="red"> (d) <h1 id="note">
24. 24.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) #star (b) #main (c) li (d) .star
25. 25.True or false: #hero is an id selector. (a) True (b) False
26. 26.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
27. 27.🎯 Which CSS selector matches this element?
    <p class="box" id="intro">Hello</p> (a) h1 (b) .box (c) .star (d) #box
28. 28.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="hero">Hello</h2> (a) #hero (b) #menu (c) li (d) .note
29. 29.🎯 Which element does the selector h2 style? (a) <span id="hero"> (b) <div class="big"> (c) <h2 class="big"> (d) <li>
30. 30.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
31. 31.True or false: p is an element selector. (a) False (b) True
32. 32.True or false: .card is an id selector. (a) True (b) False
33. 33.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) p (b) #end (c) #big (d) .red
34. 34.🎯 Which CSS selector matches this element?
    <li class="menu" id="end">Hello</li> (a) li (b) #menu (c) .note (d) .end
35. 35.True or false: .big is a class selector. (a) True (b) False
36. 36.🎯 Which element does the selector p style? (a) <p class="note"> (b) <li id="end"> (c) <h2 class="note"> (d) <h1>
37. 37.🎯 Which CSS selector matches this element?
    <h1 class="big" id="intro">Hello</h1> (a) h2 (b) #intro (c) #big (d) .red
38. 38.🎯 Can many elements share the same class? (a) No (b) Yes
39. 39.🎯 Which element does the selector .menu style? (a) <li class="note"> (b) <li class="menu"> (c) <div class="big"> (d) <li id="menu">
40. 40.True or false: .star is a class selector. (a) True (b) False

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