CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 520 · 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 CSS selector matches this element?
   <div class="box" id="end">Hello</div> (a) #end (b) #box (c) .end (d) #hero
2. 2.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
3. 3.🎯 Which sign starts a class selector? (a) & (b) . (c) # (d) @
4. 4.🎯 Which CSS selector matches this element?
   <h1 class="star" id="main">Hello</h1> (a) h2 (b) #logo (c) #star (d) #main
5. 5.🎯 Which sign starts an id selector? (a) & (b) @ (c) . (d) #
6. 6.True or false: .note is an element selector. (a) True (b) False
7. 7.🎯 Which CSS selector matches this element?
   <h1 class="star" id="top">Hello</h1> (a) h2 (b) h1 (c) .top (d) .menu
8. 8.True or false: .card is an id selector. (a) False (b) True
9. 9.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="end">Hello</h2> (a) #hero (b) #menu (c) li (d) #end
10. 10.🎯 Which CSS selector matches this element?
    <span class="star" id="main">Hello</span> (a) p (b) .star (c) .menu (d) #star
11. 11.🎯 What kind of selector is p? (a) an element selector (b) an id selector (c) a class selector
12. 12.🎯 How many elements on a page should have the same id? (a) 2 (b) 1 (c) any number (d) 5
13. 13.🎯 Which element does the selector #intro style? (a) <h2 id="main"> (b) <li class="red"> (c) <h2 id="intro"> (d) <h2 class="intro">
14. 14.🎯 What kind of selector is h1? (a) an id selector (b) an element selector (c) a class selector
15. 15.🎯 Which element does the selector .big style? (a) <li class="big"> (b) <li class="red"> (c) <div class="box"> (d) <li id="big">
16. 16.🎯 Can many elements share the same class? (a) No (b) Yes
17. 17.🎯 Which CSS selector matches this element?
    <p class="note" id="intro">Hello</p> (a) h1 (b) #intro (c) .big (d) #note
18. 18.🎯 Which element does the selector div style? (a) <div class="note"> (b) <span> (c) <p class="note"> (d) <h1 id="intro">
19. 19.🎯 Which element does the selector #top style? (a) <h2 class="top"> (b) <h2 id="intro"> (c) <li class="red"> (d) <h2 id="top">
20. 20.True or false: #top is an id selector. (a) False (b) True
21. 21.True or false: #main is an id selector. (a) False (b) True
22. 22.🎯 Which CSS selector matches this element?
    <h2 class="red" id="end">Hello</h2> (a) li (b) .end (c) h2 (d) #red
23. 23.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2> (a) #star (b) .hero (c) #top (d) #hero
24. 24.True or false: #hero is a class selector. (a) False (b) True
25. 25.True or false: body is an element selector. (a) True (b) False
26. 26.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
27. 27.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
28. 28.🎯 Which CSS selector matches this element?
    <div class="big" id="intro">Hello</div> (a) #main (b) .intro (c) div (d) span
29. 29.🎯 What kind of selector is .star? (a) an id selector (b) an element selector (c) a class selector
30. 30.🎯 Which element does the selector #logo style? (a) <div id="end"> (b) <span class="box"> (c) <div class="logo"> (d) <div id="logo">
31. 31.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
32. 32.🎯 Which element does the selector #logo style? (a) <p id="end"> (b) <h1 class="star"> (c) <p id="logo"> (d) <p class="logo">
33. 33.🎯 Which element does the selector .red style? (a) <li class="box"> (b) <div class="star"> (c) <li class="red"> (d) <li id="red">
34. 34.🎯 Which CSS selector matches this element?
    <div class="big" id="main">Hello</div> (a) #big (b) .big (c) .red (d) .main
35. 35.🎯 Which element does the selector div style? (a) <h1 id="logo"> (b) <p class="red"> (c) <div class="red"> (d) <span>
36. 36.🎯 Which CSS selector matches this element?
    <li class="menu" id="top">Hello</li> (a) #intro (b) .top (c) li (d) .note
37. 37.🎯 Which CSS selector matches this element?
    <h1 class="red" id="top">Hello</h1> (a) h1 (b) .top (c) #intro (d) .box
38. 38.True or false: p is an id selector. (a) True (b) False
39. 39.🎯 What kind of selector is img? (a) a class selector (b) an id selector (c) an element selector
40. 40.True or false: .star is an element selector. (a) True (b) False

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