CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 915 · 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.True or false: #end is an id selector. (a) False (b) True
2. 2.🎯 What kind of selector is #end? (a) an id selector (b) a class selector (c) an element selector
3. 3.🎯 Which CSS selector matches this element?
   <h1 class="note" id="end">Hello</h1> (a) #hero (b) .note (c) h2 (d) #note
4. 4.🎯 Which CSS selector matches this element?
   <div class="big" id="main">Hello</div> (a) span (b) #big (c) div (d) .red
5. 5.🎯 Which CSS selector matches this element?
   <li class="box" id="top">Hello</li> (a) .star (b) #box (c) li (d) .top
6. 6.🎯 Which CSS selector matches this element?
   <h1 class="star" id="end">Hello</h1> (a) .menu (b) h2 (c) .star (d) .end
7. 7.🎯 What kind of selector is .big? (a) an element selector (b) a class selector (c) an id selector
8. 8.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
9. 9.🎯 Which element does the selector #logo style? (a) <h2 id="end"> (b) <h2 class="logo"> (c) <li class="red"> (d) <h2 id="logo">
10. 10.🎯 Can many elements share the same class? (a) Yes (b) No
11. 11.🎯 What kind of selector is #main? (a) an id selector (b) an element selector (c) a class selector
12. 12.🎯 Which CSS selector matches this element?
    <p class="red" id="hero">Hello</p> (a) p (b) .hero (c) #top (d) .box
13. 13.🎯 What kind of selector is img? (a) an element selector (b) an id selector (c) a class selector
14. 14.🎯 Which sign starts an id selector? (a) # (b) @ (c) & (d) .
15. 15.True or false: #logo is an id selector. (a) False (b) True
16. 16.🎯 Which sign starts a class selector? (a) @ (b) & (c) . (d) #
17. 17.🎯 How many elements on a page should have the same id? (a) any number (b) 2 (c) 5 (d) 1
18. 18.🎯 What kind of selector is #hero? (a) an element selector (b) a class selector (c) an id selector
19. 19.True or false: img is a class selector. (a) True (b) False
20. 20.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="intro">Hello</h1> (a) #main (b) .intro (c) .menu (d) #menu
21. 21.True or false: #top is an id selector. (a) False (b) True
22. 22.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
23. 23.True or false: .note is a class selector. (a) False (b) True
24. 24.🎯 Which element does the selector h1 style? (a) <li class="menu"> (b) <h1 class="menu"> (c) <div id="main"> (d) <h2>
25. 25.🎯 Which element does the selector .note style? (a) <p id="note"> (b) <p class="big"> (c) <h1 class="red"> (d) <p class="note">
26. 26.🎯 What kind of selector is p? (a) a class selector (b) an element selector (c) an id selector
27. 27.🎯 Which CSS selector matches this element?
    <p class="star" id="top">Hello</p> (a) h1 (b) .top (c) p (d) #star
28. 28.True or false: p is an element selector. (a) True (b) False
29. 29.True or false: #end is an element selector. (a) True (b) False
30. 30.🎯 Which element does the selector .red style? (a) <li class="star"> (b) <h2 class="box"> (c) <h2 id="red"> (d) <h2 class="red">
31. 31.🎯 Which CSS selector matches this element?
    <p class="note" id="logo">Hello</p> (a) .big (b) #note (c) p (d) .logo
32. 32.🎯 Which CSS selector matches this element?
    <span class="note" id="logo">Hello</span> (a) span (b) #end (c) .big (d) p
33. 33.True or false: h1 is an id selector. (a) True (b) False
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) h1 (b) #star (c) h2 (d) .intro
35. 35.🎯 Which element does the selector #main style? (a) <p id="main"> (b) <p id="logo"> (c) <h1 class="star"> (d) <p class="main">
36. 36.🎯 Which CSS selector matches this element?
    <li class="red" id="hero">Hello</li> (a) .box (b) #top (c) #red (d) li
37. 37.🎯 Which CSS selector matches this element?
    <p class="box" id="main">Hello</p> (a) .box (b) #box (c) .star (d) .main
38. 38.🎯 Which element does the selector .red style? (a) <span class="star"> (b) <div class="box"> (c) <div id="red"> (d) <div class="red">
39. 39.🎯 Which element does the selector h1 style? (a) <li class="red"> (b) <h1 class="red"> (c) <div id="intro"> (d) <h2>
40. 40.🎯 Which CSS selector matches this element?
    <li class="star" id="top">Hello</li> (a) div (b) li (c) #star (d) #intro

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