CSS Worksheet: Selectors Class and Id

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

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