CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 580 · 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 p? (a) a class selector (b) an element selector (c) an id selector
2. 2.True or false: #end is a class selector. (a) True (b) False
3. 3.🎯 Which CSS selector matches this element?
   <h2 class="note" id="main">Hello</h2> (a) .main (b) #note (c) #logo (d) .note
4. 4.🎯 Can many elements share the same class? (a) No (b) Yes
5. 5.🎯 Which element does the selector .box style? (a) <p class="menu"> (b) <span id="box"> (c) <span class="star"> (d) <span class="box">
6. 6.True or false: #top is an element selector. (a) True (b) False
7. 7.True or false: #top is an id selector. (a) True (b) False
8. 8.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
9. 9.🎯 Which sign starts a class selector? (a) @ (b) . (c) # (d) &
10. 10.🎯 Which element does the selector .note style? (a) <li class="red"> (b) <h2 id="note"> (c) <h2 class="note"> (d) <h2 class="big">
11. 11.🎯 Which element does the selector #logo style? (a) <li class="star"> (b) <h2 id="end"> (c) <h2 class="logo"> (d) <h2 id="logo">
12. 12.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p> (a) .top (b) h1 (c) p (d) #red
13. 13.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
14. 14.🎯 Which CSS selector matches this element?
    <p class="star" id="main">Hello</p> (a) .main (b) .menu (c) #star (d) p
15. 15.True or false: li is an element selector. (a) True (b) False
16. 16.True or false: .note is an id selector. (a) True (b) False
17. 17.🎯 Which element does the selector #main style? (a) <li class="main"> (b) <li id="logo"> (c) <li id="main"> (d) <div class="box">
18. 18.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) any number (d) 1
19. 19.🎯 Which element does the selector #intro style? (a) <h1 class="intro"> (b) <h2 class="note"> (c) <h1 id="main"> (d) <h1 id="intro">
20. 20.🎯 Which element does the selector .big style? (a) <li class="box"> (b) <h2 class="big"> (c) <h2 class="red"> (d) <h2 id="big">
21. 21.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
22. 22.🎯 Which CSS selector matches this element?
    <p class="menu" id="top">Hello</p> (a) .top (b) #intro (c) .menu (d) h1
23. 23.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) .menu (b) #star (c) .logo (d) h1
24. 24.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
25. 25.True or false: h1 is an element selector. (a) True (b) False
26. 26.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
27. 27.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector
28. 28.🎯 What kind of selector is #hero? (a) a class selector (b) an id selector (c) an element selector
29. 29.🎯 Which CSS selector matches this element?
    <p class="note" id="hero">Hello</p> (a) #top (b) h1 (c) #note (d) .note
30. 30.🎯 Which element does the selector #main style? (a) <h2 class="main"> (b) <h2 id="main"> (c) <h2 id="logo"> (d) <li class="note">
31. 31.🎯 What kind of selector is body? (a) an element selector (b) a class selector (c) an id selector
32. 32.🎯 Which CSS selector matches this element?
    <div class="red" id="end">Hello</div> (a) span (b) #red (c) .box (d) #end
33. 33.True or false: #hero is an id selector. (a) True (b) False
34. 34.🎯 Which element does the selector h1 style? (a) <div id="top"> (b) <h2> (c) <li class="menu"> (d) <h1 class="menu">
35. 35.🎯 Which element does the selector .menu style? (a) <p id="menu"> (b) <h1 class="big"> (c) <p class="note"> (d) <p class="menu">
36. 36.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span> (a) #main (b) #box (c) .main (d) .star
37. 37.🎯 What kind of selector is .card? (a) a class selector (b) an id selector (c) an element selector
38. 38.True or false: h1 is a class selector. (a) True (b) False
39. 39.True or false: .note is a class selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span> (a) p (b) #box (c) .top (d) #top

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