CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 501 · 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 CSS selector matches this element?
   <p class="note" id="intro">Hello</p> (a) .note (b) #note (c) .intro (d) h1
2. 2.🎯 What kind of selector is body? (a) an id selector (b) an element selector (c) a class selector
3. 3.🎯 How many elements on a page should have the same id? (a) 1 (b) 5 (c) any number (d) 2
4. 4.True or false: .card is an id selector. (a) True (b) False
5. 5.🎯 What kind of selector is #logo? (a) an element selector (b) a class selector (c) an id selector
6. 6.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="logo">Hello</h1> (a) h2 (b) #logo (c) #end (d) #menu
7. 7.🎯 Which CSS selector matches this element?
   <p class="red" id="intro">Hello</p> (a) .intro (b) h1 (c) #intro (d) #red
8. 8.🎯 What kind of selector is #hero? (a) an id selector (b) a class selector (c) an element selector
9. 9.🎯 Which sign starts a class selector? (a) & (b) . (c) # (d) @
10. 10.True or false: .card is a class selector. (a) False (b) True
11. 11.True or false: #end is a class selector. (a) True (b) False
12. 12.🎯 What kind of selector is #end? (a) an element selector (b) an id selector (c) a class selector
13. 13.🎯 What kind of selector is img? (a) an element selector (b) a class selector (c) an id selector
14. 14.🎯 Which CSS selector matches this element?
    <span class="note" id="logo">Hello</span> (a) .big (b) .logo (c) .note (d) p
15. 15.True or false: .note is an element selector. (a) True (b) False
16. 16.🎯 Which element does the selector .note style? (a) <span id="note"> (b) <span class="big"> (c) <span class="note"> (d) <p class="red">
17. 17.🎯 Which CSS selector matches this element?
    <h2 class="big" id="hero">Hello</h2> (a) #big (b) #top (c) .red (d) h2
18. 18.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) .end (b) #hero (c) h2 (d) .box
19. 19.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) .star (b) #end (c) li (d) #star
20. 20.🎯 Which element does the selector span style? (a) <h2 id="intro"> (b) <p> (c) <h1 class="big"> (d) <span class="big">
21. 21.🎯 Which element does the selector div style? (a) <p class="big"> (b) <h1 id="end"> (c) <div class="big"> (d) <span>
22. 22.🎯 What kind of selector is .star? (a) a class selector (b) an id selector (c) an element selector
23. 23.🎯 Which CSS selector matches this element?
    <div class="red" id="intro">Hello</div> (a) #red (b) #main (c) span (d) div
24. 24.🎯 Which CSS selector matches this element?
    <li class="big" id="hero">Hello</li> (a) div (b) #top (c) .big (d) .red
25. 25.🎯 What kind of selector is .big? (a) an id selector (b) a class selector (c) an element selector
26. 26.True or false: .menu is an id selector. (a) True (b) False
27. 27.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="hero">Hello</h2> (a) .note (b) h2 (c) .hero (d) #menu
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="red" id="intro">Hello</h1> (a) .intro (b) .box (c) h1 (d) #red
29. 29.True or false: h1 is an element selector. (a) True (b) False
30. 30.🎯 Which element does the selector #top style? (a) <span id="intro"> (b) <p class="big"> (c) <span class="top"> (d) <span id="top">
31. 31.🎯 Which CSS selector matches this element?
    <li class="star" id="hero">Hello</li> (a) div (b) #top (c) .menu (d) #hero
32. 32.🎯 Which element does the selector #top style? (a) <h1 id="top"> (b) <h1 id="intro"> (c) <h2 class="star"> (d) <h1 class="top">
33. 33.True or false: p is a class selector. (a) True (b) False
34. 34.🎯 Can many elements share the same class? (a) Yes (b) No
35. 35.True or false: p is an id selector. (a) False (b) True
36. 36.🎯 Which CSS selector matches this element?
    <p class="big" id="intro">Hello</p> (a) .red (b) #big (c) #intro (d) #main
37. 37.True or false: img is an id selector. (a) True (b) False
38. 38.🎯 Which CSS selector matches this element?
    <span class="star" id="main">Hello</span> (a) .menu (b) .star (c) #star (d) p
39. 39.🎯 Which element does the selector #main style? (a) <p class="main"> (b) <h1 class="big"> (c) <p id="logo"> (d) <p id="main">
40. 40.True or false: h1 is a class selector. (a) True (b) False

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