CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 150 · 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 a class selector? (a) . (b) @ (c) & (d) #
2. 2.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
3. 3.🎯 Which sign starts an id selector? (a) & (b) # (c) @ (d) .
4. 4.🎯 Which CSS selector matches this element?
   <span class="big" id="hero">Hello</span> (a) #hero (b) #top (c) .hero (d) .red
5. 5.🎯 Which element does the selector .star style? (a) <p class="star"> (b) <h1 class="note"> (c) <p class="menu"> (d) <p id="star">
6. 6.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
7. 7.🎯 Which CSS selector matches this element?
   <span class="red" id="intro">Hello</span> (a) #red (b) .box (c) span (d) #main
8. 8.🎯 What kind of selector is img? (a) a class selector (b) an element selector (c) an id selector
9. 9.🎯 Which CSS selector matches this element?
   <h2 class="star" id="top">Hello</h2> (a) .menu (b) h2 (c) .top (d) li
10. 10.True or false: h1 is an id selector. (a) True (b) False
11. 11.🎯 Which element does the selector h1 style? (a) <li class="big"> (b) <div id="intro"> (c) <h2> (d) <h1 class="big">
12. 12.🎯 Which element does the selector #top style? (a) <p id="intro"> (b) <h1 class="note"> (c) <p id="top"> (d) <p class="top">
13. 13.🎯 Which CSS selector matches this element?
    <p class="big" id="logo">Hello</p> (a) h1 (b) #big (c) p (d) .logo
14. 14.🎯 Which CSS selector matches this element?
    <div class="star" id="main">Hello</div> (a) .main (b) #main (c) #logo (d) span
15. 15.🎯 What kind of selector is h1? (a) an element selector (b) a class selector (c) an id selector
16. 16.True or false: p is a class selector. (a) True (b) False
17. 17.🎯 What kind of selector is .star? (a) an element selector (b) a class selector (c) an id selector
18. 18.🎯 Which element does the selector #hero style? (a) <p class="red"> (b) <span id="hero"> (c) <span class="hero"> (d) <span id="top">
19. 19.🎯 Which element does the selector #end style? (a) <p id="end"> (b) <p class="end"> (c) <p id="hero"> (d) <h1 class="big">
20. 20.🎯 Which CSS selector matches this element?
    <p class="note" id="top">Hello</p> (a) #intro (b) #note (c) h1 (d) p
21. 21.🎯 What kind of selector is body? (a) a class selector (b) an element selector (c) an id selector
22. 22.🎯 Can many elements share the same class? (a) Yes (b) No
23. 23.🎯 Which CSS selector matches this element?
    <div class="menu" id="top">Hello</div> (a) span (b) .note (c) #top (d) #intro
24. 24.🎯 Which CSS selector matches this element?
    <div class="red" id="hero">Hello</div> (a) span (b) .hero (c) .red (d) #red
25. 25.🎯 What kind of selector is li? (a) a class selector (b) an id selector (c) an element selector
26. 26.🎯 Which CSS selector matches this element?
    <div class="big" id="logo">Hello</div> (a) #big (b) #logo (c) .logo (d) span
27. 27.True or false: #main is an id selector. (a) False (b) True
28. 28.🎯 Which element does the selector #intro style? (a) <span class="star"> (b) <div class="intro"> (c) <div id="intro"> (d) <div id="main">
29. 29.🎯 Which CSS selector matches this element?
    <h1 class="star" id="logo">Hello</h1> (a) .logo (b) #end (c) #logo (d) #star
30. 30.🎯 What kind of selector is p? (a) an element selector (b) a class selector (c) an id selector
31. 31.🎯 Which element does the selector h1 style? (a) <div id="intro"> (b) <h2> (c) <li class="menu"> (d) <h1 class="menu">
32. 32.🎯 What kind of selector is .menu? (a) a class selector (b) an element selector (c) an id selector
33. 33.🎯 Which element does the selector #main style? (a) <li id="logo"> (b) <li class="main"> (c) <li id="main"> (d) <div class="red">
34. 34.🎯 What kind of selector is #main? (a) an id selector (b) an element selector (c) a class selector
35. 35.🎯 Which CSS selector matches this element?
    <div class="note" id="hero">Hello</div> (a) span (b) .big (c) .note (d) #note
36. 36.🎯 Which element does the selector li style? (a) <div> (b) <p id="top"> (c) <span class="box"> (d) <li class="box">
37. 37.🎯 Which CSS selector matches this element?
    <div class="big" id="hero">Hello</div> (a) .red (b) .hero (c) #big (d) div
38. 38.True or false: img is a class selector. (a) True (b) False
39. 39.True or false: #logo is a class selector. (a) True (b) False
40. 40.🎯 Which element does the selector h1 style? (a) <div id="logo"> (b) <li class="box"> (c) <h1 class="box"> (d) <h2>

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