CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 550 · 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.🎯 How many elements on a page should have the same id? (a) any number (b) 1 (c) 5 (d) 2
2. 2.True or false: #main is an element selector. (a) True (b) False
3. 3.True or false: #top is an element selector. (a) False (b) True
4. 4.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
5. 5.🎯 Which sign starts an id selector? (a) @ (b) # (c) & (d) .
6. 6.🎯 Which element does the selector #end style? (a) <p id="hero"> (b) <p class="end"> (c) <p id="end"> (d) <h1 class="big">
7. 7.🎯 Which element does the selector .menu style? (a) <span class="big"> (b) <div class="note"> (c) <div class="menu"> (d) <div id="menu">
8. 8.🎯 Which element does the selector p style? (a) <h1> (b) <li id="end"> (c) <p class="box"> (d) <h2 class="box">
9. 9.🎯 Which element does the selector .menu style? (a) <h2 id="menu"> (b) <li class="big"> (c) <h2 class="menu"> (d) <h2 class="note">
10. 10.🎯 Which element does the selector h2 style? (a) <li> (b) <div class="star"> (c) <span id="intro"> (d) <h2 class="star">
11. 11.🎯 Which element does the selector div style? (a) <div class="note"> (b) <span> (c) <h1 id="intro"> (d) <p class="note">
12. 12.🎯 What kind of selector is .menu? (a) an element selector (b) an id selector (c) a class selector
13. 13.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) #star (b) #hero (c) .star (d) .end
14. 14.🎯 Which CSS selector matches this element?
    <div class="menu" id="end">Hello</div> (a) span (b) #end (c) .end (d) #menu
15. 15.🎯 Which element does the selector #intro style? (a) <h1 class="note"> (b) <p class="intro"> (c) <p id="intro"> (d) <p id="main">
16. 16.🎯 Which element does the selector #logo style? (a) <li class="logo"> (b) <li id="end"> (c) <div class="box"> (d) <li id="logo">
17. 17.🎯 Which CSS selector matches this element?
    <div class="note" id="intro">Hello</div> (a) #main (b) .intro (c) .note (d) #note
18. 18.🎯 What kind of selector is #logo? (a) a class selector (b) an element selector (c) an id selector
19. 19.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span> (a) #intro (b) .star (c) .box (d) p
20. 20.🎯 Which CSS selector matches this element?
    <li class="red" id="end">Hello</li> (a) div (b) .end (c) .red (d) #red
21. 21.🎯 What kind of selector is .big? (a) a class selector (b) an id selector (c) an element selector
22. 22.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
23. 23.🎯 Which sign starts a class selector? (a) # (b) @ (c) & (d) .
24. 24.🎯 Which element does the selector .star style? (a) <div class="menu"> (b) <span class="note"> (c) <div class="star"> (d) <div id="star">
25. 25.🎯 What kind of selector is li? (a) an element selector (b) an id selector (c) a class selector
26. 26.🎯 Which element does the selector h1 style? (a) <li class="box"> (b) <h2> (c) <div id="end"> (d) <h1 class="box">
27. 27.True or false: body is a class selector. (a) True (b) False
28. 28.True or false: li is an element selector. (a) True (b) False
29. 29.🎯 Which element does the selector h2 style? (a) <div class="red"> (b) <li> (c) <h2 class="red"> (d) <span id="top">
30. 30.🎯 Which element does the selector #hero style? (a) <li id="hero"> (b) <li id="top"> (c) <li class="hero"> (d) <div class="box">
31. 31.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
32. 32.🎯 Which CSS selector matches this element?
    <span class="box" id="intro">Hello</span> (a) .star (b) #box (c) .intro (d) #intro
33. 33.🎯 Which element does the selector h2 style? (a) <h2 class="big"> (b) <li> (c) <span id="intro"> (d) <div class="big">
34. 34.🎯 Which element does the selector #end style? (a) <h1 id="end"> (b) <h2 class="note"> (c) <h1 id="hero"> (d) <h1 class="end">
35. 35.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) .menu (b) #star (c) p (d) #hero
36. 36.🎯 Which CSS selector matches this element?
    <div class="star" id="top">Hello</div> (a) #top (b) .top (c) #star (d) span
37. 37.True or false: .menu is a class selector. (a) False (b) True
38. 38.🎯 Which element does the selector h1 style? (a) <h1 class="star"> (b) <div id="intro"> (c) <h2> (d) <li class="star">
39. 39.True or false: h1 is a class selector. (a) False (b) True
40. 40.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector

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