CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 417 · 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.True or false: #main is an element selector. (a) False (b) True
2. 2.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="big" id="intro">Hello</h1> (a) #big (b) #intro (c) .red (d) #main
4. 4.True or false: #logo is a class selector. (a) True (b) False
5. 5.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
6. 6.🎯 What kind of selector is #main? (a) an id selector (b) an element selector (c) a class selector
7. 7.🎯 Which element does the selector #main style? (a) <span id="main"> (b) <span class="main"> (c) <p class="star"> (d) <span id="logo">
8. 8.🎯 Which sign starts an id selector? (a) & (b) # (c) . (d) @
9. 9.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
10. 10.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) #main (b) h1 (c) .intro (d) #note
11. 11.🎯 How many elements on a page should have the same id? (a) 5 (b) 1 (c) any number (d) 2
12. 12.🎯 Can many elements share the same class? (a) No (b) Yes
13. 13.🎯 Which CSS selector matches this element?
    <span class="star" id="main">Hello</span> (a) .main (b) p (c) #star (d) #main
14. 14.🎯 Which CSS selector matches this element?
    <div class="note" id="main">Hello</div> (a) .main (b) #logo (c) #main (d) .big
15. 15.🎯 Which element does the selector span style? (a) <h2 id="hero"> (b) <p> (c) <h1 class="note"> (d) <span class="note">
16. 16.🎯 Which element does the selector .menu style? (a) <h1 class="menu"> (b) <h1 id="menu"> (c) <h2 class="big"> (d) <h1 class="note">
17. 17.🎯 Which element does the selector li style? (a) <span class="note"> (b) <div> (c) <p id="intro"> (d) <li class="note">
18. 18.True or false: .card is a class selector. (a) True (b) False
19. 19.🎯 Which element does the selector .star style? (a) <div class="star"> (b) <span class="note"> (c) <div id="star"> (d) <div class="menu">
20. 20.True or false: body is an id selector. (a) False (b) True
21. 21.🎯 Which element does the selector #main style? (a) <h2 id="logo"> (b) <h2 class="main"> (c) <h2 id="main"> (d) <li class="note">
22. 22.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
23. 23.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
24. 24.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
25. 25.🎯 Which element does the selector h1 style? (a) <div id="logo"> (b) <li class="red"> (c) <h1 class="red"> (d) <h2>
26. 26.True or false: #logo is an element selector. (a) False (b) True
27. 27.True or false: .menu is an id selector. (a) False (b) True
28. 28.True or false: #top is an id selector. (a) True (b) False
29. 29.🎯 Which CSS selector matches this element?
    <div class="box" id="main">Hello</div> (a) span (b) .box (c) #logo (d) #box
30. 30.True or false: #hero is an id selector. (a) False (b) True
31. 31.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
32. 32.🎯 Which element does the selector span style? (a) <span class="star"> (b) <h2 id="main"> (c) <p> (d) <h1 class="star">
33. 33.🎯 Which element does the selector #logo style? (a) <li id="end"> (b) <li class="logo"> (c) <div class="red"> (d) <li id="logo">
34. 34.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) .end (b) p (c) #box (d) span
35. 35.🎯 Which sign starts a class selector? (a) & (b) @ (c) # (d) .
36. 36.🎯 Which CSS selector matches this element?
    <div class="red" id="hero">Hello</div> (a) span (b) .hero (c) div (d) #top
37. 37.🎯 What kind of selector is li? (a) an element selector (b) a class selector (c) an id selector
38. 38.🎯 Which element does the selector span style? (a) <h2 id="hero"> (b) <span class="red"> (c) <h1 class="red"> (d) <p>
39. 39.🎯 Which CSS selector matches this element?
    <span class="red" id="top">Hello</span> (a) #intro (b) p (c) span (d) #red
40. 40.True or false: .big is a class selector. (a) False (b) True

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