CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 42 · 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: #hero is a class selector. (a) True (b) False
3. 3.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
4. 4.🎯 Which element does the selector span style? (a) <h1 class="red"> (b) <span class="red"> (c) <p> (d) <h2 id="hero">
5. 5.🎯 Which CSS selector matches this element?
   <span class="star" id="top">Hello</span> (a) .menu (b) #star (c) .top (d) .star
6. 6.🎯 Which element does the selector #intro style? (a) <span class="intro"> (b) <span id="main"> (c) <p class="big"> (d) <span id="intro">
7. 7.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
8. 8.True or false: .menu is a class selector. (a) False (b) True
9. 9.🎯 Which CSS selector matches this element?
   <div class="note" id="hero">Hello</div> (a) #note (b) div (c) .hero (d) .big
10. 10.🎯 Which CSS selector matches this element?
    <div class="box" id="hero">Hello</div> (a) span (b) #hero (c) .star (d) #box
11. 11.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
12. 12.🎯 Can many elements share the same class? (a) No (b) Yes
13. 13.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) #main (b) h1 (c) h2 (d) .intro
14. 14.True or false: #hero is an id selector. (a) True (b) False
15. 15.🎯 Which CSS selector matches this element?
    <span class="red" id="top">Hello</span> (a) #intro (b) .top (c) p (d) span
16. 16.True or false: .big is an id selector. (a) True (b) False
17. 17.🎯 What kind of selector is .card? (a) an id selector (b) a class selector (c) an element selector
18. 18.True or false: h1 is an id selector. (a) True (b) False
19. 19.🎯 Which element does the selector #main style? (a) <h2 class="main"> (b) <h2 id="logo"> (c) <h2 id="main"> (d) <li class="note">
20. 20.True or false: body is an element selector. (a) False (b) True
21. 21.🎯 Which CSS selector matches this element?
    <h1 class="star" id="end">Hello</h1> (a) .star (b) h2 (c) .end (d) #star
22. 22.🎯 Which sign starts an id selector? (a) & (b) # (c) . (d) @
23. 23.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
24. 24.🎯 Which CSS selector matches this element?
    <h1 class="big" id="main">Hello</h1> (a) .red (b) #logo (c) #big (d) #main
25. 25.🎯 Which element does the selector #top style? (a) <h1 id="intro"> (b) <h2 class="menu"> (c) <h1 id="top"> (d) <h1 class="top">
26. 26.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) #box (b) p (c) span (d) #hero
27. 27.🎯 Which element does the selector #intro style? (a) <p class="intro"> (b) <p id="main"> (c) <h1 class="note"> (d) <p id="intro">
28. 28.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span> (a) #star (b) .end (c) span (d) .menu
29. 29.🎯 What kind of selector is #top? (a) an id selector (b) an element selector (c) a class selector
30. 30.True or false: .big is a class selector. (a) False (b) True
31. 31.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="end">Hello</h2> (a) .end (b) #end (c) li (d) .note
32. 32.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
33. 33.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
34. 34.True or false: #end is an element selector. (a) False (b) True
35. 35.🎯 Which element does the selector p style? (a) <h1> (b) <li id="top"> (c) <h2 class="note"> (d) <p class="note">
36. 36.🎯 How many elements on a page should have the same id? (a) 2 (b) 1 (c) any number (d) 5
37. 37.True or false: #top is an element selector. (a) False (b) True
38. 38.🎯 Which CSS selector matches this element?
    <p class="big" id="end">Hello</p> (a) p (b) #big (c) #hero (d) h1
39. 39.True or false: .card is an element selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) .hero (b) #top (c) .red (d) li

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