CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 944 · 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: img is an element selector. (a) True (b) False
2. 2.True or false: .menu is an id selector. (a) True (b) False
3. 3.True or false: .note is a class selector. (a) True (b) False
4. 4.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
5. 5.🎯 Which CSS selector matches this element?
   <li class="note" id="hero">Hello</li> (a) div (b) #top (c) #note (d) .note
6. 6.🎯 Which element does the selector h1 style? (a) <li class="note"> (b) <div id="logo"> (c) <h2> (d) <h1 class="note">
7. 7.🎯 Which CSS selector matches this element?
   <span class="box" id="hero">Hello</span> (a) span (b) p (c) .hero (d) #box
8. 8.🎯 Which CSS selector matches this element?
   <div class="box" id="logo">Hello</div> (a) .logo (b) div (c) #end (d) .star
9. 9.True or false: #main is an element selector. (a) False (b) True
10. 10.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
11. 11.True or false: .big is a class selector. (a) True (b) False
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1> (a) .top (b) h2 (c) .red (d) #red
13. 13.🎯 Which CSS selector matches this element?
    <span class="red" id="intro">Hello</span> (a) #intro (b) .box (c) #red (d) .intro
14. 14.🎯 What kind of selector is p? (a) a class selector (b) an id selector (c) an element selector
15. 15.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector
16. 16.🎯 Which sign starts an id selector? (a) # (b) @ (c) & (d) .
17. 17.🎯 What kind of selector is #top? (a) an id selector (b) a class selector (c) an element selector
18. 18.🎯 Which CSS selector matches this element?
    <h2 class="box" id="top">Hello</h2> (a) #intro (b) #box (c) .star (d) .box
19. 19.🎯 Which element does the selector .box style? (a) <h1 class="menu"> (b) <p class="box"> (c) <p class="star"> (d) <p id="box">
20. 20.🎯 What kind of selector is #main? (a) an id selector (b) an element selector (c) a class selector
21. 21.🎯 Which CSS selector matches this element?
    <span class="menu" id="main">Hello</span> (a) #menu (b) .note (c) #main (d) .main
22. 22.True or false: body is an element selector. (a) False (b) True
23. 23.🎯 Which element does the selector #end style? (a) <p id="hero"> (b) <p class="end"> (c) <p id="end"> (d) <h1 class="box">
24. 24.🎯 Which CSS selector matches this element?
    <p class="red" id="main">Hello</p> (a) #logo (b) h1 (c) #main (d) .main
25. 25.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
26. 26.🎯 Which element does the selector div style? (a) <h1 id="logo"> (b) <span> (c) <div class="menu"> (d) <p class="menu">
27. 27.🎯 Which element does the selector h2 style? (a) <div class="star"> (b) <li> (c) <h2 class="star"> (d) <span id="main">
28. 28.🎯 Which CSS selector matches this element?
    <span class="menu" id="end">Hello</span> (a) p (b) #menu (c) #end (d) .note
29. 29.🎯 Which element does the selector #hero style? (a) <h2 id="top"> (b) <li class="red"> (c) <h2 class="hero"> (d) <h2 id="hero">
30. 30.🎯 Which element does the selector #end style? (a) <span class="end"> (b) <p class="red"> (c) <span id="end"> (d) <span id="hero">
31. 31.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="top">Hello</h1> (a) .note (b) .top (c) #top (d) #intro
32. 32.🎯 Which element does the selector #main style? (a) <h1 class="main"> (b) <h2 class="star"> (c) <h1 id="logo"> (d) <h1 id="main">
33. 33.🎯 Which CSS selector matches this element?
    <div class="star" id="logo">Hello</div> (a) .menu (b) div (c) span (d) #end
34. 34.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
35. 35.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p> (a) .menu (b) .star (c) #end (d) .logo
36. 36.🎯 Which CSS selector matches this element?
    <h1 class="note" id="end">Hello</h1> (a) .note (b) #note (c) #hero (d) .end
37. 37.🎯 Can many elements share the same class? (a) No (b) Yes
38. 38.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
39. 39.🎯 How many elements on a page should have the same id? (a) 1 (b) any number (c) 5 (d) 2
40. 40.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) #hero (b) .end (c) #menu (d) #end

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