CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 202 · 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?
   <h1 class="box" id="intro">Hello</h1> (a) h1 (b) #box (c) .intro (d) h2
2. 2.🎯 Which sign starts an id selector? (a) . (b) @ (c) # (d) &
3. 3.🎯 What kind of selector is .menu? (a) a class selector (b) an id selector (c) an element selector
4. 4.True or false: .card is a class selector. (a) False (b) True
5. 5.🎯 Which element does the selector .menu style? (a) <p class="note"> (b) <p id="menu"> (c) <p class="menu"> (d) <h1 class="big">
6. 6.🎯 Which CSS selector matches this element?
   <h2 class="box" id="end">Hello</h2> (a) li (b) .star (c) #hero (d) #end
7. 7.🎯 Which CSS selector matches this element?
   <h2 class="note" id="top">Hello</h2> (a) #intro (b) .top (c) li (d) .note
8. 8.🎯 Can many elements share the same class? (a) No (b) Yes
9. 9.🎯 Which element does the selector #hero style? (a) <span id="top"> (b) <span class="hero"> (c) <span id="hero"> (d) <p class="red">
10. 10.🎯 Which CSS selector matches this element?
    <h1 class="red" id="main">Hello</h1> (a) #main (b) h2 (c) #logo (d) .main
11. 11.🎯 Which element does the selector .red style? (a) <div id="red"> (b) <div class="box"> (c) <span class="star"> (d) <div class="red">
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) #big (b) .red (c) li (d) h2
13. 13.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
14. 14.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 5 (d) 2
15. 15.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li> (a) .star (b) .box (c) #logo (d) div
16. 16.True or false: img is an id selector. (a) False (b) True
17. 17.🎯 Which element does the selector #intro style? (a) <h2 class="note"> (b) <h1 id="intro"> (c) <h1 id="main"> (d) <h1 class="intro">
18. 18.🎯 Which element does the selector #hero style? (a) <h2 class="note"> (b) <h1 id="top"> (c) <h1 id="hero"> (d) <h1 class="hero">
19. 19.True or false: #logo is an id selector. (a) True (b) False
20. 20.🎯 Which element does the selector .star style? (a) <span class="note"> (b) <div class="star"> (c) <div id="star"> (d) <div class="menu">
21. 21.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) #logo (b) h2 (c) .main (d) #box
22. 22.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) .red (b) .top (c) .big (d) #intro
23. 23.🎯 Which CSS selector matches this element?
    <p class="note" id="logo">Hello</p> (a) p (b) h1 (c) .logo (d) #note
24. 24.True or false: .card is an id selector. (a) False (b) True
25. 25.True or false: #end is an id selector. (a) False (b) True
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1> (a) .box (b) #box (c) .top (d) h2
27. 27.🎯 Which CSS selector matches this element?
    <div class="menu" id="main">Hello</div> (a) #menu (b) .main (c) #logo (d) div
28. 28.🎯 Which CSS selector matches this element?
    <li class="note" id="main">Hello</li> (a) #note (b) #logo (c) .big (d) .note
29. 29.🎯 Which CSS selector matches this element?
    <div class="note" id="intro">Hello</div> (a) div (b) .big (c) span (d) #main
30. 30.🎯 Which CSS selector matches this element?
    <h2 class="red" id="top">Hello</h2> (a) .top (b) li (c) #red (d) #top
31. 31.True or false: #logo is an element selector. (a) True (b) False
32. 32.True or false: #top is an id selector. (a) False (b) True
33. 33.🎯 Which element does the selector .red style? (a) <li class="box"> (b) <li id="red"> (c) <li class="red"> (d) <div class="star">
34. 34.🎯 Which element does the selector .big style? (a) <li class="red"> (b) <li id="big"> (c) <div class="box"> (d) <li class="big">
35. 35.🎯 Which element does the selector h2 style? (a) <li> (b) <h2 class="star"> (c) <span id="end"> (d) <div class="star">
36. 36.🎯 What kind of selector is body? (a) a class selector (b) an element selector (c) an id selector
37. 37.True or false: .star is an id selector. (a) True (b) False
38. 38.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
39. 39.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
40. 40.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <h1 class="menu"> (c) <p class="logo"> (d) <p id="logo">

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