CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 164 · 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?
   <li class="menu" id="logo">Hello</li> (a) #end (b) .logo (c) .menu (d) .note
3. 3.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
4. 4.🎯 Which element does the selector .menu style? (a) <li class="big"> (b) <h2 class="menu"> (c) <h2 class="note"> (d) <h2 id="menu">
5. 5.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
6. 6.True or false: #end is an element selector. (a) True (b) False
7. 7.🎯 Which element does the selector .star style? (a) <p class="note"> (b) <span class="menu"> (c) <span id="star"> (d) <span class="star">
8. 8.🎯 Which sign starts a class selector? (a) . (b) @ (c) & (d) #
9. 9.🎯 Which CSS selector matches this element?
   <h1 class="note" id="top">Hello</h1> (a) h2 (b) #intro (c) h1 (d) #note
10. 10.True or false: #end is a class selector. (a) True (b) False
11. 11.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p> (a) h1 (b) .red (c) #intro (d) #red
12. 12.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
13. 13.🎯 Which CSS selector matches this element?
    <li class="menu" id="end">Hello</li> (a) #menu (b) .end (c) li (d) .note
14. 14.🎯 Which element does the selector #logo style? (a) <h1 class="logo"> (b) <h2 class="menu"> (c) <h1 id="logo"> (d) <h1 id="end">
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2> (a) .red (b) h2 (c) .main (d) li
16. 16.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) .end (b) #hero (c) .star (d) h1
17. 17.🎯 Can many elements share the same class? (a) Yes (b) No
18. 18.🎯 Which CSS selector matches this element?
    <span class="menu" id="end">Hello</span> (a) #hero (b) #end (c) .end (d) #menu
19. 19.🎯 Which element does the selector #logo style? (a) <li class="star"> (b) <h2 class="logo"> (c) <h2 id="end"> (d) <h2 id="logo">
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="note" id="main">Hello</h1> (a) h1 (b) .main (c) #logo (d) .big
21. 21.True or false: .star is an id selector. (a) False (b) True
22. 22.🎯 What kind of selector is .big? (a) an element selector (b) a class selector (c) an id selector
23. 23.🎯 What kind of selector is img? (a) an id selector (b) an element selector (c) a class selector
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) #top (b) #intro (c) #big (d) .top
25. 25.🎯 Which element does the selector .box style? (a) <h1 class="box"> (b) <h1 class="star"> (c) <h2 class="menu"> (d) <h1 id="box">
26. 26.🎯 Which element does the selector .note style? (a) <h1 class="note"> (b) <h2 class="red"> (c) <h1 id="note"> (d) <h1 class="big">
27. 27.🎯 Which element does the selector p style? (a) <h1> (b) <h2 class="red"> (c) <li id="hero"> (d) <p class="red">
28. 28.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
29. 29.🎯 Which element does the selector .big style? (a) <div class="red"> (b) <span class="box"> (c) <div class="big"> (d) <div id="big">
30. 30.True or false: #top is an id selector. (a) True (b) False
31. 31.🎯 Which element does the selector .note style? (a) <li id="note"> (b) <div class="red"> (c) <li class="note"> (d) <li class="big">
32. 32.🎯 Which CSS selector matches this element?
    <li class="box" id="main">Hello</li> (a) #main (b) #box (c) #logo (d) div
33. 33.🎯 Which CSS selector matches this element?
    <li class="box" id="logo">Hello</li> (a) div (b) li (c) #end (d) .star
34. 34.🎯 Which element does the selector .menu style? (a) <h1 id="menu"> (b) <h1 class="menu"> (c) <h2 class="big"> (d) <h1 class="note">
35. 35.🎯 Which element does the selector #top style? (a) <h2 class="top"> (b) <li class="note"> (c) <h2 id="top"> (d) <h2 id="intro">
36. 36.True or false: #end is an id selector. (a) True (b) False
37. 37.🎯 Which CSS selector matches this element?
    <span class="big" id="end">Hello</span> (a) .big (b) #hero (c) .red (d) #big
38. 38.True or false: .card is an id selector. (a) True (b) False
39. 39.True or false: img is an element selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <li class="box" id="end">Hello</li> (a) .star (b) li (c) .end (d) #box

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