CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 367 · 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 sign starts an id selector? (a) & (b) # (c) . (d) @
2. 2.🎯 Which CSS selector matches this element?
   <div class="note" id="top">Hello</div> (a) .note (b) .top (c) #note (d) span
3. 3.🎯 Which CSS selector matches this element?
   <span class="red" id="top">Hello</span> (a) #red (b) .red (c) p (d) #intro
4. 4.True or false: p is a class selector. (a) False (b) True
5. 5.True or false: #main is an id selector. (a) False (b) True
6. 6.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) 1 (d) any number
7. 7.🎯 Which element does the selector #hero style? (a) <div class="big"> (b) <li id="top"> (c) <li class="hero"> (d) <li id="hero">
8. 8.🎯 Which element does the selector .menu style? (a) <span class="big"> (b) <div class="note"> (c) <div id="menu"> (d) <div class="menu">
9. 9.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
10. 10.🎯 Can many elements share the same class? (a) Yes (b) No
11. 11.True or false: body is an element selector. (a) False (b) True
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="red" id="main">Hello</h2> (a) h2 (b) .box (c) #red (d) li
13. 13.True or false: .card is an id selector. (a) False (b) True
14. 14.🎯 Which element does the selector li style? (a) <div> (b) <span class="note"> (c) <p id="hero"> (d) <li class="note">
15. 15.🎯 Which element does the selector #end style? (a) <li id="end"> (b) <li id="hero"> (c) <div class="star"> (d) <li class="end">
16. 16.True or false: #top is an id selector. (a) False (b) True
17. 17.🎯 Which element does the selector #hero style? (a) <p id="hero"> (b) <p class="hero"> (c) <h1 class="star"> (d) <p id="top">
18. 18.True or false: #logo is an id selector. (a) False (b) True
19. 19.🎯 Which CSS selector matches this element?
    <div class="big" id="end">Hello</div> (a) .end (b) span (c) .red (d) div
20. 20.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) p (b) #main (c) h1 (d) .big
21. 21.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
22. 22.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) #top (b) .top (c) h1 (d) .red
23. 23.🎯 Which element does the selector span style? (a) <span class="note"> (b) <h2 id="logo"> (c) <p> (d) <h1 class="note">
24. 24.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) li (b) .red (c) .end (d) #big
25. 25.🎯 Which element does the selector #end style? (a) <p class="end"> (b) <h1 class="note"> (c) <p id="hero"> (d) <p id="end">
26. 26.🎯 Which CSS selector matches this element?
    <li class="note" id="logo">Hello</li> (a) div (b) #note (c) .note (d) #end
27. 27.True or false: #hero is an element selector. (a) True (b) False
28. 28.🎯 Which CSS selector matches this element?
    <p class="star" id="hero">Hello</p> (a) #top (b) #star (c) .hero (d) #hero
29. 29.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) .intro (b) h2 (c) .menu (d) #intro
30. 30.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="hero">Hello</h1> (a) h2 (b) #menu (c) #top (d) .menu
31. 31.🎯 Which element does the selector .box style? (a) <h1 id="box"> (b) <h1 class="box"> (c) <h2 class="menu"> (d) <h1 class="star">
32. 32.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li> (a) li (b) #box (c) div (d) .star
33. 33.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <h2 id="top"> (c) <li class="star"> (d) <h2 class="top">
34. 34.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
35. 35.True or false: li is an element selector. (a) True (b) False
36. 36.🎯 Which element does the selector .menu style? (a) <span class="menu"> (b) <span id="menu"> (c) <span class="note"> (d) <p class="big">
37. 37.True or false: .menu is a class selector. (a) True (b) False
38. 38.True or false: h1 is an element selector. (a) True (b) False
39. 39.🎯 What kind of selector is img? (a) an id selector (b) a class selector (c) an element selector
40. 40.🎯 Which element does the selector #end style? (a) <div id="hero"> (b) <div id="end"> (c) <span class="menu"> (d) <div class="end">

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