CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 213 · 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="note" id="end">Hello</h1> (a) h2 (b) #note (c) #hero (d) h1
2. 2.🎯 Which CSS selector matches this element?
   <li class="note" id="hero">Hello</li> (a) .big (b) #top (c) #note (d) #hero
3. 3.True or false: p is an element selector. (a) False (b) True
4. 4.🎯 What kind of selector is #logo? (a) an id selector (b) a class selector (c) an element selector
5. 5.True or false: #top is an element selector. (a) True (b) False
6. 6.True or false: #hero is an element selector. (a) False (b) True
7. 7.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
8. 8.🎯 Which CSS selector matches this element?
   <div class="red" id="hero">Hello</div> (a) #red (b) #top (c) div (d) .hero
9. 9.🎯 Which element does the selector #main style? (a) <div id="logo"> (b) <div class="main"> (c) <div id="main"> (d) <span class="big">
10. 10.True or false: #main is an element selector. (a) True (b) False
11. 11.🎯 Which element does the selector .big style? (a) <span class="box"> (b) <div class="red"> (c) <div id="big"> (d) <div class="big">
12. 12.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
13. 13.🎯 Which CSS selector matches this element?
    <div class="box" id="intro">Hello</div> (a) #box (b) .star (c) span (d) div
14. 14.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
15. 15.🎯 Which sign starts a class selector? (a) # (b) & (c) . (d) @
16. 16.🎯 Can many elements share the same class? (a) Yes (b) No
17. 17.🎯 Which element does the selector .big style? (a) <span id="big"> (b) <span class="red"> (c) <p class="box"> (d) <span class="big">
18. 18.True or false: #logo is a class selector. (a) True (b) False
19. 19.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
20. 20.🎯 Which element does the selector #logo style? (a) <p class="big"> (b) <span id="logo"> (c) <span class="logo"> (d) <span id="end">
21. 21.🎯 Which CSS selector matches this element?
    <h2 class="note" id="intro">Hello</h2> (a) .intro (b) #note (c) h2 (d) .big
22. 22.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="box"> (c) <div id="logo"> (d) <li class="box">
23. 23.🎯 Which element does the selector #intro style? (a) <p id="intro"> (b) <p id="main"> (c) <p class="intro"> (d) <h1 class="box">
24. 24.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) 1 (d) any number
25. 25.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) .hero (b) .note (c) h1 (d) #note
26. 26.🎯 Which element does the selector #hero style? (a) <span class="big"> (b) <div class="hero"> (c) <div id="hero"> (d) <div id="top">
27. 27.🎯 Which element does the selector h1 style? (a) <div id="intro"> (b) <h1 class="note"> (c) <li class="note"> (d) <h2>
28. 28.🎯 What kind of selector is p? (a) an element selector (b) a class selector (c) an id selector
29. 29.True or false: li is a class selector. (a) False (b) True
30. 30.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span> (a) span (b) #box (c) #main (d) .star
31. 31.True or false: li is an element selector. (a) False (b) True
32. 32.🎯 What kind of selector is h1? (a) an element selector (b) a class selector (c) an id selector
33. 33.🎯 Which element does the selector .star style? (a) <p class="star"> (b) <p id="star"> (c) <p class="menu"> (d) <h1 class="note">
34. 34.🎯 Which element does the selector #intro style? (a) <li id="main"> (b) <div class="menu"> (c) <li class="intro"> (d) <li id="intro">
35. 35.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
36. 36.🎯 Which element does the selector #top style? (a) <h2 class="top"> (b) <h2 id="intro"> (c) <li class="note"> (d) <h2 id="top">
37. 37.🎯 Which element does the selector h1 style? (a) <h2> (b) <h1 class="big"> (c) <div id="end"> (d) <li class="big">
38. 38.True or false: .menu is a class selector. (a) False (b) True
39. 39.True or false: #end is an id selector. (a) False (b) True
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="end">Hello</h1> (a) h2 (b) .end (c) #end (d) #hero

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