CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 109 · 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) an element selector (b) a class selector (c) an id selector
2. 2.🎯 Which CSS selector matches this element?
   <span class="red" id="top">Hello</span> (a) p (b) .red (c) #red (d) .box
3. 3.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 5 (d) 1
4. 4.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
5. 5.True or false: .star is an id selector. (a) False (b) True
6. 6.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="main">Hello</h2> (a) #logo (b) li (c) .menu (d) #menu
7. 7.🎯 Which CSS selector matches this element?
   <h1 class="red" id="logo">Hello</h1> (a) .box (b) .logo (c) #red (d) h1
8. 8.🎯 Which CSS selector matches this element?
   <h2 class="box" id="end">Hello</h2> (a) li (b) .end (c) #end (d) #box
9. 9.🎯 Which CSS selector matches this element?
   <h2 class="big" id="top">Hello</h2> (a) .big (b) .red (c) #intro (d) #big
10. 10.🎯 Which sign starts an id selector? (a) # (b) @ (c) & (d) .
11. 11.🎯 What kind of selector is .card? (a) an element selector (b) a class selector (c) an id selector
12. 12.🎯 Can many elements share the same class? (a) No (b) Yes
13. 13.🎯 Which element does the selector .menu style? (a) <div id="menu"> (b) <div class="note"> (c) <div class="menu"> (d) <span class="big">
14. 14.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
15. 15.🎯 Which CSS selector matches this element?
    <p class="menu" id="logo">Hello</p> (a) .note (b) #logo (c) h1 (d) #menu
16. 16.🎯 Which element does the selector #main style? (a) <div class="main"> (b) <div id="logo"> (c) <div id="main"> (d) <span class="red">
17. 17.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
18. 18.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) #intro (b) .intro (c) h2 (d) #main
19. 19.🎯 Which element does the selector #intro style? (a) <li class="intro"> (b) <li id="intro"> (c) <div class="star"> (d) <li id="main">
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?
    <h1 class="big" id="main">Hello</h1> (a) #logo (b) #main (c) .main (d) #big
22. 22.🎯 Which element does the selector h1 style? (a) <div id="hero"> (b) <h1 class="box"> (c) <h2> (d) <li class="box">
23. 23.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p> (a) .menu (b) h1 (c) #star (d) p
24. 24.True or false: .menu is an id selector. (a) False (b) True
25. 25.🎯 Which sign starts a class selector? (a) & (b) # (c) . (d) @
26. 26.🎯 Which CSS selector matches this element?
    <p class="red" id="intro">Hello</p> (a) h1 (b) #main (c) .red (d) .box
27. 27.🎯 Which CSS selector matches this element?
    <div class="note" id="intro">Hello</div> (a) .intro (b) #main (c) #note (d) div
28. 28.🎯 Which element does the selector div style? (a) <div class="big"> (b) <span> (c) <p class="big"> (d) <h1 id="main">
29. 29.🎯 Which CSS selector matches this element?
    <li class="note" id="top">Hello</li> (a) #top (b) .big (c) .top (d) #intro
30. 30.🎯 Which element does the selector div style? (a) <p class="red"> (b) <span> (c) <div class="red"> (d) <h1 id="intro">
31. 31.True or false: li is a class selector. (a) True (b) False
32. 32.True or false: #main is an element selector. (a) False (b) True
33. 33.🎯 Which CSS selector matches this element?
    <li class="red" id="hero">Hello</li> (a) .box (b) #red (c) .hero (d) li
34. 34.True or false: #end is an element selector. (a) False (b) True
35. 35.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) #end (b) h1 (c) h2 (d) #star
36. 36.🎯 Which CSS selector matches this element?
    <p class="red" id="top">Hello</p> (a) p (b) h1 (c) .top (d) .box
37. 37.True or false: #main is a class selector. (a) True (b) False
38. 38.🎯 Which element does the selector #top style? (a) <span id="intro"> (b) <span class="top"> (c) <span id="top"> (d) <p class="menu">
39. 39.🎯 Which element does the selector #intro style? (a) <h1 id="intro"> (b) <h2 class="note"> (c) <h1 id="main"> (d) <h1 class="intro">
40. 40.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector

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