CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 401 · 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.True or false: #logo is an id selector. (a) True (b) False
2. 2.True or false: li is a class selector. (a) True (b) False
3. 3.🎯 Which element does the selector .menu style? (a) <h2 class="big"> (b) <h1 id="menu"> (c) <h1 class="menu"> (d) <h1 class="note">
4. 4.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
5. 5.🎯 Which CSS selector matches this element?
   <li class="red" id="top">Hello</li> (a) #intro (b) #red (c) .red (d) div
6. 6.🎯 How many elements on a page should have the same id? (a) any number (b) 5 (c) 1 (d) 2
7. 7.🎯 Which CSS selector matches this element?
   <p class="box" id="end">Hello</p> (a) .end (b) #box (c) p (d) .star
8. 8.🎯 Which CSS selector matches this element?
   <span class="box" id="hero">Hello</span> (a) #top (b) .hero (c) span (d) #box
9. 9.🎯 Which element does the selector #logo style? (a) <span class="logo"> (b) <p class="big"> (c) <span id="logo"> (d) <span id="end">
10. 10.🎯 Which CSS selector matches this element?
    <li class="star" id="intro">Hello</li> (a) .menu (b) #star (c) li (d) .intro
11. 11.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) .star (b) .end (c) .box (d) #box
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="star" id="main">Hello</h1> (a) #logo (b) h1 (c) .menu (d) h2
13. 13.🎯 Which element does the selector #top style? (a) <p id="intro"> (b) <p class="top"> (c) <p id="top"> (d) <h1 class="big">
14. 14.True or false: .menu is an id selector. (a) False (b) True
15. 15.True or false: .big is an element selector. (a) True (b) False
16. 16.🎯 What kind of selector is img? (a) an element selector (b) a class selector (c) an id selector
17. 17.🎯 Which sign starts a class selector? (a) @ (b) . (c) # (d) &
18. 18.🎯 Which CSS selector matches this element?
    <p class="note" id="end">Hello</p> (a) .big (b) .end (c) #note (d) #end
19. 19.🎯 Which element does the selector #end style? (a) <h1 class="big"> (b) <p id="end"> (c) <p id="hero"> (d) <p class="end">
20. 20.🎯 Which element does the selector #intro style? (a) <li class="menu"> (b) <h2 class="intro"> (c) <h2 id="main"> (d) <h2 id="intro">
21. 21.🎯 Which element does the selector .menu style? (a) <span id="menu"> (b) <span class="note"> (c) <span class="menu"> (d) <p class="big">
22. 22.🎯 Which CSS selector matches this element?
    <p class="menu" id="logo">Hello</p> (a) .note (b) #logo (c) #menu (d) h1
23. 23.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
24. 24.True or false: p is an element selector. (a) True (b) False
25. 25.🎯 Which element does the selector p style? (a) <h1> (b) <li id="hero"> (c) <h2 class="note"> (d) <p class="note">
26. 26.True or false: #logo is a class selector. (a) False (b) True
27. 27.🎯 Which element does the selector #end style? (a) <h2 class="end"> (b) <li class="note"> (c) <h2 id="hero"> (d) <h2 id="end">
28. 28.🎯 Which CSS selector matches this element?
    <p class="box" id="top">Hello</p> (a) .star (b) .box (c) .top (d) h1
29. 29.🎯 Which CSS selector matches this element?
    <div class="note" id="end">Hello</div> (a) #note (b) #hero (c) div (d) .big
30. 30.True or false: #end is an id selector. (a) False (b) True
31. 31.🎯 Can many elements share the same class? (a) No (b) Yes
32. 32.True or false: #logo is an element selector. (a) False (b) True
33. 33.🎯 Which element does the selector .big style? (a) <li id="big"> (b) <div class="box"> (c) <li class="red"> (d) <li class="big">
34. 34.🎯 Which CSS selector matches this element?
    <div class="big" id="logo">Hello</div> (a) .red (b) #big (c) #logo (d) .logo
35. 35.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
36. 36.🎯 Which CSS selector matches this element?
    <h1 class="big" id="intro">Hello</h1> (a) h2 (b) #big (c) h1 (d) #main
37. 37.🎯 Which CSS selector matches this element?
    <div class="red" id="main">Hello</div> (a) div (b) #red (c) #logo (d) .main
38. 38.True or false: .note is a class selector. (a) False (b) True
39. 39.🎯 Which element does the selector li style? (a) <li class="note"> (b) <div> (c) <p id="top"> (d) <span class="note">
40. 40.🎯 Which sign starts an id selector? (a) # (b) @ (c) & (d) .

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