CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 415 · 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 #top? (a) an element selector (b) a class selector (c) an id selector
2. 2.🎯 What kind of selector is .card? (a) an element selector (b) a class selector (c) an id selector
3. 3.🎯 Which sign starts a class selector? (a) @ (b) # (c) . (d) &
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="note" id="intro">Hello</h1> (a) #main (b) h2 (c) #note (d) .note
5. 5.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="end">Hello</h1> (a) h2 (b) #hero (c) .menu (d) .end
6. 6.True or false: .menu is an id selector. (a) True (b) False
7. 7.🎯 Which CSS selector matches this element?
   <li class="star" id="top">Hello</li> (a) .menu (b) #star (c) #top (d) .top
8. 8.🎯 Can many elements share the same class? (a) No (b) Yes
9. 9.🎯 Which element does the selector #end style? (a) <h2 id="hero"> (b) <h2 class="end"> (c) <li class="box"> (d) <h2 id="end">
10. 10.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) #hero (b) .hero (c) .red (d) #top
11. 11.🎯 Which CSS selector matches this element?
    <span class="star" id="hero">Hello</span> (a) .hero (b) .star (c) p (d) .menu
12. 12.🎯 Which CSS selector matches this element?
    <div class="red" id="main">Hello</div> (a) span (b) #red (c) #main (d) #logo
13. 13.🎯 What kind of selector is #hero? (a) an id selector (b) an element selector (c) a class selector
14. 14.True or false: #top is an element selector. (a) True (b) False
15. 15.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 2 (d) 5
16. 16.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
17. 17.🎯 Which element does the selector #intro style? (a) <h1 class="red"> (b) <p id="intro"> (c) <p class="intro"> (d) <p id="main">
18. 18.🎯 Which element does the selector .big style? (a) <h2 class="red"> (b) <li class="box"> (c) <h2 class="big"> (d) <h2 id="big">
19. 19.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
20. 20.🎯 What kind of selector is #main? (a) an element selector (b) a class selector (c) an id selector
21. 21.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) #intro (b) h1 (c) #note (d) #main
22. 22.🎯 Which sign starts an id selector? (a) & (b) # (c) . (d) @
23. 23.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
24. 24.True or false: #main is an id selector. (a) True (b) False
25. 25.🎯 Which CSS selector matches this element?
    <h2 class="red" id="intro">Hello</h2> (a) .red (b) li (c) #main (d) .intro
26. 26.True or false: h1 is an element selector. (a) False (b) True
27. 27.True or false: .big is a class selector. (a) False (b) True
28. 28.🎯 Which element does the selector .note style? (a) <h1 class="big"> (b) <h2 class="red"> (c) <h1 id="note"> (d) <h1 class="note">
29. 29.True or false: #hero is an id selector. (a) True (b) False
30. 30.🎯 Which element does the selector .note style? (a) <li class="note"> (b) <li id="note"> (c) <div class="red"> (d) <li class="big">
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="big" id="end">Hello</h1> (a) #end (b) h2 (c) .red (d) #big
32. 32.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
33. 33.True or false: img is an element selector. (a) False (b) True
34. 34.True or false: .menu is an element selector. (a) True (b) False
35. 35.True or false: #main is a class selector. (a) True (b) False
36. 36.🎯 Which element does the selector .big style? (a) <h2 class="box"> (b) <h1 id="big"> (c) <h1 class="red"> (d) <h1 class="big">
37. 37.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span> (a) #box (b) #intro (c) .star (d) .box
38. 38.True or false: #top is an id selector. (a) False (b) True
39. 39.True or false: .big is an element selector. (a) False (b) True
40. 40.🎯 Which element does the selector .big style? (a) <span class="red"> (b) <p class="box"> (c) <span id="big"> (d) <span class="big">

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