CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 246 · 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.🎯 What kind of selector is h1? (a) a class selector (b) an id selector (c) an element selector
2. 2.🎯 Which sign starts a class selector? (a) & (b) @ (c) . (d) #
3. 3.🎯 Which CSS selector matches this element?
   <span class="note" id="end">Hello</span> (a) p (b) .big (c) span (d) .end
4. 4.🎯 Which CSS selector matches this element?
   <span class="red" id="hero">Hello</span> (a) p (b) .box (c) #top (d) .red
5. 5.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
6. 6.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
7. 7.🎯 Which CSS selector matches this element?
   <h2 class="big" id="intro">Hello</h2> (a) #intro (b) li (c) .intro (d) #big
8. 8.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
9. 9.🎯 Which element does the selector p style? (a) <h2 class="note"> (b) <h1> (c) <li id="intro"> (d) <p class="note">
10. 10.🎯 Can many elements share the same class? (a) Yes (b) No
11. 11.True or false: .star is an id selector. (a) True (b) False
12. 12.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
13. 13.🎯 Which sign starts an id selector? (a) # (b) & (c) . (d) @
14. 14.🎯 Which CSS selector matches this element?
    <li class="big" id="logo">Hello</li> (a) #big (b) .logo (c) #end (d) #logo
15. 15.True or false: h1 is an id selector. (a) False (b) True
16. 16.True or false: .note is an element selector. (a) True (b) False
17. 17.🎯 Which element does the selector .menu style? (a) <h2 class="big"> (b) <h1 class="menu"> (c) <h1 id="menu"> (d) <h1 class="note">
18. 18.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) 1 (d) any number
19. 19.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) .note (b) .menu (c) #hero (d) #menu
20. 20.True or false: p is an element selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <div class="star" id="intro">Hello</div> (a) .menu (b) #main (c) .star (d) #star
22. 22.True or false: .menu is an element selector. (a) True (b) False
23. 23.True or false: #top is a class selector. (a) True (b) False
24. 24.🎯 Which element does the selector #logo style? (a) <span id="logo"> (b) <span class="logo"> (c) <span id="end"> (d) <p class="star">
25. 25.🎯 Which CSS selector matches this element?
    <h2 class="big" id="logo">Hello</h2> (a) #end (b) .red (c) h2 (d) .logo
26. 26.🎯 Which element does the selector #top style? (a) <div class="note"> (b) <li id="intro"> (c) <li id="top"> (d) <li class="top">
27. 27.🎯 Which element does the selector #intro style? (a) <span id="main"> (b) <p class="menu"> (c) <span id="intro"> (d) <span class="intro">
28. 28.🎯 Which element does the selector #intro style? (a) <h1 class="intro"> (b) <h1 id="intro"> (c) <h1 id="main"> (d) <h2 class="box">
29. 29.True or false: .big is a class selector. (a) True (b) False
30. 30.🎯 Which CSS selector matches this element?
    <li class="red" id="end">Hello</li> (a) .box (b) #end (c) div (d) #hero
31. 31.True or false: #main is an id selector. (a) True (b) False
32. 32.True or false: img is an id selector. (a) True (b) False
33. 33.🎯 Which CSS selector matches this element?
    <h2 class="box" id="hero">Hello</h2> (a) li (b) #top (c) #box (d) h2
34. 34.True or false: #end is an element selector. (a) True (b) False
35. 35.🎯 Which element does the selector .big style? (a) <li id="big"> (b) <li class="red"> (c) <div class="box"> (d) <li class="big">
36. 36.🎯 Which CSS selector matches this element?
    <div class="menu" id="main">Hello</div> (a) .main (b) span (c) #menu (d) .menu
37. 37.True or false: .big is an id selector. (a) False (b) True
38. 38.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
39. 39.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
40. 40.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) .box (b) #box (c) .end (d) p

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