CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 575 · 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.🎯 Which sign starts an id selector? (a) & (b) # (c) . (d) @
2. 2.🎯 Which element does the selector h2 style? (a) <li> (b) <span id="main"> (c) <div class="red"> (d) <h2 class="red">
3. 3.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="red" id="main">Hello</h1> (a) .main (b) h2 (c) #red (d) .red
5. 5.🎯 Which CSS selector matches this element?
   <span class="menu" id="main">Hello</span> (a) p (b) .main (c) #logo (d) #main
6. 6.🎯 Which CSS selector matches this element?
   <h2 class="red" id="main">Hello</h2> (a) #main (b) #red (c) #logo (d) .main
7. 7.🎯 Which element does the selector #top style? (a) <h2 id="intro"> (b) <li class="red"> (c) <h2 class="top"> (d) <h2 id="top">
8. 8.🎯 Which element does the selector .big style? (a) <h1 id="big"> (b) <h1 class="red"> (c) <h2 class="box"> (d) <h1 class="big">
9. 9.🎯 Which sign starts a class selector? (a) @ (b) # (c) . (d) &
10. 10.🎯 Which CSS selector matches this element?
    <h2 class="big" id="main">Hello</h2> (a) .big (b) .main (c) li (d) #big
11. 11.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) #intro (b) #main (c) #note (d) .intro
12. 12.🎯 What kind of selector is .menu? (a) an element selector (b) a class selector (c) an id selector
13. 13.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
14. 14.🎯 Which element does the selector #intro style? (a) <p class="box"> (b) <span id="intro"> (c) <span class="intro"> (d) <span id="main">
15. 15.True or false: li is a class selector. (a) True (b) False
16. 16.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .star (b) p (c) .main (d) #box
17. 17.🎯 Which CSS selector matches this element?
    <li class="star" id="logo">Hello</li> (a) #logo (b) .logo (c) #star (d) div
18. 18.🎯 Which element does the selector #intro style? (a) <h2 class="box"> (b) <h1 id="main"> (c) <h1 class="intro"> (d) <h1 id="intro">
19. 19.🎯 What kind of selector is body? (a) an id selector (b) a class selector (c) an element selector
20. 20.🎯 Which CSS selector matches this element?
    <span class="red" id="end">Hello</span> (a) .box (b) .end (c) p (d) span
21. 21.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span> (a) p (b) .main (c) #main (d) #logo
22. 22.🎯 Which element does the selector #hero style? (a) <p class="star"> (b) <span class="hero"> (c) <span id="top"> (d) <span id="hero">
23. 23.🎯 Which CSS selector matches this element?
    <div class="red" id="main">Hello</div> (a) .red (b) .box (c) #red (d) #logo
24. 24.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
25. 25.🎯 Which element does the selector h2 style? (a) <span id="main"> (b) <li> (c) <div class="box"> (d) <h2 class="box">
26. 26.🎯 Which CSS selector matches this element?
    <li class="menu" id="main">Hello</li> (a) .main (b) div (c) #logo (d) li
27. 27.🎯 What kind of selector is .card? (a) an element selector (b) a class selector (c) an id selector
28. 28.🎯 Which element does the selector span style? (a) <h1 class="note"> (b) <p> (c) <span class="note"> (d) <h2 id="end">
29. 29.True or false: #end is a class selector. (a) True (b) False
30. 30.🎯 Can many elements share the same class? (a) No (b) Yes
31. 31.🎯 Which CSS selector matches this element?
    <span class="menu" id="main">Hello</span> (a) #menu (b) .menu (c) .note (d) .main
32. 32.True or false: .note is a class selector. (a) False (b) True
33. 33.🎯 Which element does the selector #main style? (a) <h2 class="main"> (b) <li class="box"> (c) <h2 id="logo"> (d) <h2 id="main">
34. 34.🎯 Which element does the selector #main style? (a) <li id="main"> (b) <div class="note"> (c) <li class="main"> (d) <li id="logo">
35. 35.🎯 Which element does the selector #intro style? (a) <p id="intro"> (b) <p class="intro"> (c) <h1 class="note"> (d) <p id="main">
36. 36.True or false: #main is an element selector. (a) False (b) True
37. 37.True or false: .star is an element selector. (a) True (b) False
38. 38.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
39. 39.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
40. 40.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector

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