CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 60 · 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.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
3. 3.🎯 Which CSS selector matches this element?
   <span class="box" id="hero">Hello</span> (a) #top (b) .hero (c) #hero (d) .star
4. 4.True or false: .menu is a class selector. (a) True (b) False
5. 5.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="intro"> (c) <h1 class="menu"> (d) <li class="menu">
6. 6.🎯 Which element does the selector #hero style? (a) <h1 class="hero"> (b) <h2 class="note"> (c) <h1 id="hero"> (d) <h1 id="top">
7. 7.True or false: .star is an element selector. (a) True (b) False
8. 8.🎯 Which CSS selector matches this element?
   <h1 class="red" id="logo">Hello</h1> (a) .logo (b) .box (c) .red (d) h2
9. 9.🎯 Which element does the selector h1 style? (a) <h2> (b) <div id="main"> (c) <li class="red"> (d) <h1 class="red">
10. 10.🎯 Which element does the selector .note style? (a) <h2 class="big"> (b) <h2 id="note"> (c) <h2 class="note"> (d) <li class="red">
11. 11.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="end">Hello</h1> (a) h2 (b) .note (c) .menu (d) #menu
12. 12.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) #intro (b) #menu (c) .intro (d) h2
13. 13.🎯 Which element does the selector #top style? (a) <h2 class="top"> (b) <h2 id="intro"> (c) <li class="big"> (d) <h2 id="top">
14. 14.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
15. 15.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) h2 (b) .logo (c) #star (d) .menu
16. 16.🎯 What kind of selector is img? (a) an element selector (b) a class selector (c) an id selector
17. 17.🎯 Which CSS selector matches this element?
    <div class="red" id="top">Hello</div> (a) .top (b) .box (c) #red (d) #top
18. 18.🎯 What kind of selector is p? (a) an id selector (b) an element selector (c) a class selector
19. 19.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
20. 20.🎯 Which element does the selector .box style? (a) <p class="box"> (b) <p class="star"> (c) <p id="box"> (d) <h1 class="menu">
21. 21.🎯 Which element does the selector .big style? (a) <li id="big"> (b) <div class="box"> (c) <li class="big"> (d) <li class="red">
22. 22.🎯 Can many elements share the same class? (a) No (b) Yes
23. 23.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="intro">Hello</h2> (a) #intro (b) #menu (c) .intro (d) .note
24. 24.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p> (a) h1 (b) .top (c) .star (d) #star
25. 25.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
26. 26.🎯 Which CSS selector matches this element?
    <div class="star" id="logo">Hello</div> (a) #star (b) #logo (c) #end (d) span
27. 27.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
28. 28.🎯 Which element does the selector span style? (a) <p> (b) <span class="red"> (c) <h2 id="logo"> (d) <h1 class="red">
29. 29.True or false: #main is an id selector. (a) True (b) False
30. 30.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
31. 31.True or false: li is a class selector. (a) False (b) True
32. 32.🎯 Which sign starts a class selector? (a) & (b) # (c) . (d) @
33. 33.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) #top (b) .red (c) div (d) .big
34. 34.🎯 What kind of selector is #main? (a) an element selector (b) a class selector (c) an id selector
35. 35.True or false: #end is a class selector. (a) False (b) True
36. 36.🎯 Which CSS selector matches this element?
    <li class="big" id="end">Hello</li> (a) div (b) .red (c) #end (d) #big
37. 37.🎯 Which element does the selector #top style? (a) <p class="big"> (b) <span id="intro"> (c) <span id="top"> (d) <span class="top">
38. 38.🎯 Which CSS selector matches this element?
    <li class="star" id="hero">Hello</li> (a) .menu (b) div (c) .star (d) .hero
39. 39.True or false: #hero is an id selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <li class="menu" id="end">Hello</li> (a) .end (b) #hero (c) div (d) li

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