CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 123 · 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 .star? (a) a class selector (b) an id selector (c) an element selector
2. 2.🎯 Which element does the selector p style? (a) <li id="end"> (b) <h2 class="note"> (c) <p class="note"> (d) <h1>
3. 3.🎯 What kind of selector is #top? (a) a class selector (b) an element selector (c) an id selector
4. 4.True or false: .note is an element selector. (a) False (b) True
5. 5.🎯 Can many elements share the same class? (a) No (b) Yes
6. 6.🎯 Which CSS selector matches this element?
   <h1 class="box" id="hero">Hello</h1> (a) #box (b) h2 (c) h1 (d) .star
7. 7.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
8. 8.🎯 Which element does the selector #top style? (a) <div class="top"> (b) <div id="top"> (c) <div id="intro"> (d) <span class="note">
9. 9.🎯 Which CSS selector matches this element?
   <span class="menu" id="intro">Hello</span> (a) .intro (b) .note (c) .menu (d) #menu
10. 10.🎯 Which element does the selector span style? (a) <p> (b) <h1 class="menu"> (c) <h2 id="end"> (d) <span class="menu">
11. 11.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
12. 12.True or false: .menu is a class selector. (a) True (b) False
13. 13.🎯 Which CSS selector matches this element?
    <span class="note" id="top">Hello</span> (a) .note (b) .top (c) p (d) #note
14. 14.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 2 (d) 5
15. 15.🎯 Which element does the selector .box style? (a) <h2 class="box"> (b) <h2 class="star"> (c) <h2 id="box"> (d) <li class="menu">
16. 16.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2> (a) .red (b) #big (c) .big (d) #logo
17. 17.🎯 Which element does the selector .big style? (a) <h1 class="red"> (b) <h2 class="box"> (c) <h1 class="big"> (d) <h1 id="big">
18. 18.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) .red (b) #end (c) p (d) #hero
19. 19.True or false: .big is an element selector. (a) False (b) True
20. 20.True or false: h1 is an element selector. (a) False (b) True
21. 21.🎯 What kind of selector is img? (a) an id selector (b) an element selector (c) a class selector
22. 22.🎯 Which CSS selector matches this element?
    <p class="star" id="main">Hello</p> (a) h1 (b) .menu (c) .main (d) .star
23. 23.🎯 Which element does the selector #hero style? (a) <h2 class="box"> (b) <h1 id="hero"> (c) <h1 id="top"> (d) <h1 class="hero">
24. 24.🎯 Which CSS selector matches this element?
    <p class="big" id="end">Hello</p> (a) #hero (b) .end (c) h1 (d) .big
25. 25.True or false: #end is a class selector. (a) False (b) True
26. 26.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
27. 27.True or false: #logo is a class selector. (a) True (b) False
28. 28.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
29. 29.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
30. 30.🎯 Which element does the selector h2 style? (a) <div class="red"> (b) <h2 class="red"> (c) <li> (d) <span id="hero">
31. 31.🎯 What kind of selector is body? (a) a class selector (b) an id selector (c) an element selector
32. 32.True or false: body is a class selector. (a) True (b) False
33. 33.🎯 Which CSS selector matches this element?
    <h1 class="red" id="intro">Hello</h1> (a) h2 (b) #intro (c) #red (d) .box
34. 34.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) .main (b) h1 (c) #main (d) .note
35. 35.🎯 Which element does the selector .note style? (a) <span class="red"> (b) <div class="big"> (c) <div id="note"> (d) <div class="note">
36. 36.🎯 Which CSS selector matches this element?
    <li class="star" id="logo">Hello</li> (a) .logo (b) div (c) .star (d) #star
37. 37.🎯 Which sign starts an id selector? (a) # (b) . (c) @ (d) &
38. 38.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) .red (b) li (c) .end (d) #big
39. 39.🎯 Which element does the selector .box style? (a) <h2 class="menu"> (b) <h1 class="box"> (c) <h1 id="box"> (d) <h1 class="star">
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1> (a) .note (b) #intro (c) .menu (d) .top

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