CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 526 · 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.True or false: body is an element selector. (a) True (b) False
3. 3.True or false: img is a class selector. (a) True (b) False
4. 4.🎯 Which element does the selector .note style? (a) <div class="red"> (b) <li id="note"> (c) <li class="note"> (d) <li class="big">
5. 5.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 2 (d) 1
6. 6.True or false: #top is an id selector. (a) True (b) False
7. 7.🎯 Which CSS selector matches this element?
   <p class="note" id="hero">Hello</p> (a) p (b) #top (c) h1 (d) .hero
8. 8.🎯 Which sign starts an id selector? (a) & (b) @ (c) # (d) .
9. 9.🎯 Which CSS selector matches this element?
   <p class="box" id="intro">Hello</p> (a) p (b) .star (c) #box (d) #main
10. 10.🎯 Which element does the selector .red style? (a) <div id="red"> (b) <span class="star"> (c) <div class="red"> (d) <div class="box">
11. 11.🎯 What kind of selector is .card? (a) an id selector (b) an element selector (c) a class selector
12. 12.True or false: #hero is a class selector. (a) True (b) False
13. 13.True or false: .star is a class selector. (a) True (b) False
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="star" id="intro">Hello</h2> (a) #star (b) h2 (c) .menu (d) li
15. 15.🎯 Can many elements share the same class? (a) No (b) Yes
16. 16.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
17. 17.🎯 What kind of selector is h1? (a) a class selector (b) an element selector (c) an id selector
18. 18.🎯 Which CSS selector matches this element?
    <div class="star" id="intro">Hello</div> (a) .intro (b) #star (c) span (d) .star
19. 19.True or false: .note is a class selector. (a) False (b) True
20. 20.🎯 Which element does the selector h1 style? (a) <h2> (b) <li class="big"> (c) <h1 class="big"> (d) <div id="hero">
21. 21.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
22. 22.🎯 Which CSS selector matches this element?
    <span class="red" id="end">Hello</span> (a) .box (b) #red (c) span (d) p
23. 23.True or false: #logo is an element selector. (a) False (b) True
24. 24.🎯 What kind of selector is #end? (a) an element selector (b) a class selector (c) an id selector
25. 25.🎯 Which CSS selector matches this element?
    <div class="menu" id="top">Hello</div> (a) span (b) .note (c) .menu (d) .top
26. 26.🎯 What kind of selector is li? (a) an id selector (b) an element selector (c) a class selector
27. 27.🎯 Which CSS selector matches this element?
    <span class="big" id="top">Hello</span> (a) p (b) .top (c) #big (d) .big
28. 28.🎯 Which CSS selector matches this element?
    <span class="note" id="logo">Hello</span> (a) span (b) #end (c) #note (d) p
29. 29.True or false: li is a class selector. (a) False (b) True
30. 30.🎯 Which CSS selector matches this element?
    <p class="menu" id="logo">Hello</p> (a) #end (b) #menu (c) #logo (d) .logo
31. 31.True or false: h1 is an element selector. (a) False (b) True
32. 32.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
33. 33.True or false: .card is an element selector. (a) True (b) False
34. 34.🎯 Which CSS selector matches this element?
    <p class="star" id="end">Hello</p> (a) .end (b) #star (c) .menu (d) #end
35. 35.🎯 What kind of selector is .star? (a) an id selector (b) a class selector (c) an element selector
36. 36.🎯 Which CSS selector matches this element?
    <div class="note" id="main">Hello</div> (a) #logo (b) #note (c) .big (d) div
37. 37.🎯 Which CSS selector matches this element?
    <div class="big" id="hero">Hello</div> (a) #big (b) .hero (c) div (d) span
38. 38.🎯 Which CSS selector matches this element?
    <p class="star" id="main">Hello</p> (a) h1 (b) .menu (c) p (d) #star
39. 39.🎯 Which element does the selector div style? (a) <p class="star"> (b) <div class="star"> (c) <h1 id="top"> (d) <span>
40. 40.🎯 Which CSS selector matches this element?
    <span class="big" id="hero">Hello</span> (a) #big (b) #top (c) #hero (d) .red

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