CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 872 · 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 #top style? (a) <li id="intro"> (b) <div class="menu"> (c) <li class="top"> (d) <li id="top">
3. 3.🎯 Which element does the selector .note style? (a) <h2 class="red"> (b) <h1 id="note"> (c) <h1 class="big"> (d) <h1 class="note">
4. 4.🎯 Which CSS selector matches this element?
   <span class="box" id="hero">Hello</span> (a) .star (b) #hero (c) .hero (d) p
5. 5.🎯 Which element does the selector p style? (a) <li id="intro"> (b) <p class="red"> (c) <h2 class="red"> (d) <h1>
6. 6.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
7. 7.🎯 Which element does the selector #logo style? (a) <h1 id="end"> (b) <h2 class="star"> (c) <h1 class="logo"> (d) <h1 id="logo">
8. 8.🎯 Which element does the selector .red style? (a) <div id="red"> (b) <div class="box"> (c) <div class="red"> (d) <span class="star">
9. 9.🎯 Which CSS selector matches this element?
   <h2 class="star" id="main">Hello</h2> (a) #main (b) #logo (c) #star (d) .menu
10. 10.True or false: .big is an element selector. (a) False (b) True
11. 11.🎯 What kind of selector is img? (a) an id selector (b) a class selector (c) an element selector
12. 12.🎯 Which element does the selector li style? (a) <div> (b) <span class="note"> (c) <p id="intro"> (d) <li class="note">
13. 13.🎯 What kind of selector is h1? (a) a class selector (b) an element selector (c) an id selector
14. 14.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="logo"> (c) <h1 class="box"> (d) <li class="box">
15. 15.🎯 Which element does the selector .note style? (a) <p id="note"> (b) <p class="big"> (c) <h1 class="red"> (d) <p class="note">
16. 16.True or false: body is a class selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1> (a) .top (b) .star (c) .box (d) h2
18. 18.True or false: .star is an element selector. (a) False (b) True
19. 19.🎯 Can many elements share the same class? (a) No (b) Yes
20. 20.True or false: .note is an id selector. (a) True (b) False
21. 21.🎯 Which element does the selector #hero style? (a) <h1 class="hero"> (b) <h1 id="hero"> (c) <h2 class="big"> (d) <h1 id="top">
22. 22.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) #big (b) .big (c) .hero (d) .red
23. 23.🎯 Which element does the selector #intro style? (a) <li id="main"> (b) <li class="intro"> (c) <div class="box"> (d) <li id="intro">
24. 24.🎯 How many elements on a page should have the same id? (a) 2 (b) 5 (c) any number (d) 1
25. 25.🎯 What kind of selector is .card? (a) a class selector (b) an element selector (c) an id selector
26. 26.🎯 Which CSS selector matches this element?
    <p class="box" id="logo">Hello</p> (a) #end (b) #box (c) .star (d) #logo
27. 27.True or false: .menu is a class selector. (a) False (b) True
28. 28.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) span (b) #box (c) .star (d) #hero
29. 29.🎯 What kind of selector is #main? (a) an element selector (b) a class selector (c) an id selector
30. 30.🎯 What kind of selector is .star? (a) a class selector (b) an element selector (c) an id selector
31. 31.🎯 Which CSS selector matches this element?
    <h2 class="big" id="logo">Hello</h2> (a) #big (b) #end (c) h2 (d) .logo
32. 32.🎯 Which element does the selector #intro style? (a) <p class="menu"> (b) <span id="intro"> (c) <span id="main"> (d) <span class="intro">
33. 33.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) #intro (b) #note (c) h1 (d) .top
34. 34.True or false: .card is a class selector. (a) True (b) False
35. 35.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) #top (b) #intro (c) .big (d) .top
36. 36.🎯 Which element does the selector span style? (a) <p> (b) <h1 class="red"> (c) <h2 id="logo"> (d) <span class="red">
37. 37.🎯 Which element does the selector .star style? (a) <span class="star"> (b) <p class="note"> (c) <span id="star"> (d) <span class="menu">
38. 38.True or false: li is a class selector. (a) False (b) True
39. 39.🎯 Which CSS selector matches this element?
    <li class="red" id="intro">Hello</li> (a) .red (b) #main (c) #red (d) div
40. 40.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) p (b) .red (c) span (d) #big

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