CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 733 · 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.🎯 How many elements on a page should have the same id? (a) any number (b) 5 (c) 1 (d) 2
2. 2.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="red" id="intro">Hello</h1> (a) #main (b) #red (c) .box (d) #intro
4. 4.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
5. 5.🎯 Which element does the selector #hero style? (a) <p class="big"> (b) <span id="top"> (c) <span class="hero"> (d) <span id="hero">
6. 6.🎯 Which element does the selector h2 style? (a) <div class="star"> (b) <span id="intro"> (c) <h2 class="star"> (d) <li>
7. 7.🎯 Which CSS selector matches this element?
   <li class="note" id="top">Hello</li> (a) div (b) .big (c) li (d) #intro
8. 8.🎯 Which CSS selector matches this element?
   <span class="red" id="intro">Hello</span> (a) .intro (b) .red (c) p (d) #main
9. 9.True or false: p is a class selector. (a) True (b) False
10. 10.True or false: .star is a class selector. (a) False (b) True
11. 11.🎯 Which CSS selector matches this element?
    <div class="big" id="intro">Hello</div> (a) .red (b) div (c) #big (d) .intro
12. 12.True or false: img is an element selector. (a) True (b) False
13. 13.🎯 Which element does the selector #top style? (a) <h2 id="top"> (b) <h2 id="intro"> (c) <h2 class="top"> (d) <li class="big">
14. 14.🎯 Can many elements share the same class? (a) No (b) Yes
15. 15.🎯 Which sign starts an id selector? (a) . (b) & (c) # (d) @
16. 16.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <p class="logo"> (c) <p id="logo"> (d) <h1 class="red">
17. 17.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
18. 18.🎯 Which element does the selector #logo style? (a) <h2 class="logo"> (b) <h2 id="end"> (c) <li class="big"> (d) <h2 id="logo">
19. 19.🎯 Which CSS selector matches this element?
    <div class="red" id="main">Hello</div> (a) span (b) #red (c) .main (d) div
20. 20.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
21. 21.True or false: img is a class selector. (a) False (b) True
22. 22.🎯 Which CSS selector matches this element?
    <span class="note" id="top">Hello</span> (a) .big (b) #intro (c) .top (d) .note
23. 23.🎯 Which element does the selector h1 style? (a) <li class="star"> (b) <div id="intro"> (c) <h1 class="star"> (d) <h2>
24. 24.🎯 Which sign starts a class selector? (a) @ (b) & (c) . (d) #
25. 25.🎯 Which CSS selector matches this element?
    <div class="star" id="intro">Hello</div> (a) #main (b) .intro (c) span (d) .star
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="note" id="top">Hello</h2> (a) .top (b) #intro (c) .note (d) #note
27. 27.🎯 What kind of selector is #main? (a) a class selector (b) an id selector (c) an element selector
28. 28.🎯 Which CSS selector matches this element?
    <span class="note" id="hero">Hello</span> (a) .hero (b) .note (c) #note (d) .big
29. 29.🎯 Which CSS selector matches this element?
    <div class="red" id="logo">Hello</div> (a) span (b) #end (c) #logo (d) #red
30. 30.🎯 Which CSS selector matches this element?
    <h1 class="star" id="end">Hello</h1> (a) h2 (b) #star (c) .menu (d) #end
31. 31.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
32. 32.🎯 Which CSS selector matches this element?
    <h1 class="red" id="end">Hello</h1> (a) h2 (b) .box (c) #red (d) #end
33. 33.🎯 Which element does the selector .box style? (a) <p class="menu"> (b) <span id="box"> (c) <span class="box"> (d) <span class="star">
34. 34.🎯 Which element does the selector div style? (a) <span> (b) <p class="star"> (c) <div class="star"> (d) <h1 id="end">
35. 35.True or false: #logo is an id selector. (a) True (b) False
36. 36.True or false: .card is a class selector. (a) False (b) True
37. 37.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
38. 38.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
39. 39.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
40. 40.True or false: p is an element selector. (a) False (b) True

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