CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 820 · 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="main">Hello</p> (a) #logo (b) #main (c) h1 (d) #box
2. 2.🎯 Can many elements share the same class? (a) Yes (b) No
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="star" id="top">Hello</h1> (a) .top (b) #star (c) .menu (d) .star
4. 4.True or false: #end is an element selector. (a) False (b) True
5. 5.🎯 Which CSS selector matches this element?
   <h1 class="red" id="main">Hello</h1> (a) .box (b) .main (c) h1 (d) h2
6. 6.True or false: .star is an element selector. (a) True (b) False
7. 7.🎯 Which element does the selector li style? (a) <div> (b) <span class="note"> (c) <p id="main"> (d) <li class="note">
8. 8.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
9. 9.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
10. 10.🎯 What kind of selector is #hero? (a) an element selector (b) an id selector (c) a class selector
11. 11.🎯 Which CSS selector matches this element?
    <li class="box" id="intro">Hello</li> (a) .intro (b) .star (c) #intro (d) #box
12. 12.True or false: .menu is a class selector. (a) True (b) False
13. 13.True or false: #end is an id selector. (a) True (b) False
14. 14.🎯 Which element does the selector #hero style? (a) <h1 id="hero"> (b) <h1 class="hero"> (c) <h1 id="top"> (d) <h2 class="star">
15. 15.🎯 Which element does the selector .note style? (a) <span class="big"> (b) <span id="note"> (c) <p class="red"> (d) <span class="note">
16. 16.🎯 Which element does the selector #end style? (a) <h2 class="end"> (b) <li class="red"> (c) <h2 id="hero"> (d) <h2 id="end">
17. 17.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) .intro (b) #intro (c) #main (d) #note
18. 18.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
19. 19.🎯 Which element does the selector #main style? (a) <span id="main"> (b) <span id="logo"> (c) <span class="main"> (d) <p class="red">
20. 20.🎯 Which element does the selector #main style? (a) <li class="main"> (b) <div class="big"> (c) <li id="logo"> (d) <li id="main">
21. 21.🎯 Which sign starts an id selector? (a) & (b) . (c) # (d) @
22. 22.🎯 Which CSS selector matches this element?
    <li class="red" id="main">Hello</li> (a) .box (b) #logo (c) .main (d) .red
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) h2 (b) #menu (c) .intro (d) h1
24. 24.🎯 Which CSS selector matches this element?
    <span class="note" id="hero">Hello</span> (a) p (b) span (c) #note (d) .big
25. 25.True or false: img is an id selector. (a) True (b) False
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="big" id="end">Hello</h2> (a) h2 (b) #big (c) #hero (d) li
27. 27.True or false: .note is a class selector. (a) True (b) False
28. 28.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) .intro (b) li (c) .star (d) .menu
29. 29.True or false: #main is an id selector. (a) False (b) True
30. 30.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) #box (b) .end (c) #end (d) h1
31. 31.🎯 Which CSS selector matches this element?
    <p class="menu" id="intro">Hello</p> (a) h1 (b) #menu (c) p (d) .intro
32. 32.🎯 Which element does the selector .note style? (a) <h1 id="note"> (b) <h2 class="red"> (c) <h1 class="big"> (d) <h1 class="note">
33. 33.True or false: li is an element selector. (a) True (b) False
34. 34.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
35. 35.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
36. 36.🎯 Which element does the selector #end style? (a) <h1 class="end"> (b) <h1 id="end"> (c) <h2 class="note"> (d) <h1 id="hero">
37. 37.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
38. 38.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1> (a) h1 (b) .end (c) #hero (d) #big
39. 39.🎯 Which element does the selector #top style? (a) <li id="intro"> (b) <li class="top"> (c) <li id="top"> (d) <div class="box">
40. 40.🎯 Which element does the selector .box style? (a) <span class="menu"> (b) <div class="star"> (c) <div class="box"> (d) <div id="box">

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