CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 140 · 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: #logo is an id selector. (a) True (b) False
2. 2.🎯 Which CSS selector matches this element?
   <h1 class="menu" id="top">Hello</h1> (a) h2 (b) #menu (c) .note (d) #top
3. 3.True or false: h1 is an element selector. (a) True (b) False
4. 4.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
5. 5.🎯 What kind of selector is body? (a) an element selector (b) a class selector (c) an id selector
6. 6.🎯 What kind of selector is #main? (a) an element selector (b) an id selector (c) a class selector
7. 7.🎯 Which sign starts a class selector? (a) @ (b) . (c) # (d) &
8. 8.🎯 Which CSS selector matches this element?
   <div class="red" id="top">Hello</div> (a) #red (b) .top (c) span (d) #top
9. 9.🎯 Which CSS selector matches this element?
   <h1 class="note" id="end">Hello</h1> (a) #hero (b) .end (c) h2 (d) h1
10. 10.🎯 Can many elements share the same class? (a) Yes (b) No
11. 11.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
12. 12.True or false: .note is an id selector. (a) True (b) False
13. 13.🎯 Which element does the selector #hero style? (a) <h1 class="hero"> (b) <h1 id="top"> (c) <h2 class="box"> (d) <h1 id="hero">
14. 14.🎯 Which CSS selector matches this element?
    <div class="box" id="logo">Hello</div> (a) #box (b) .star (c) span (d) div
15. 15.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
16. 16.True or false: img is an element selector. (a) True (b) False
17. 17.True or false: #top is an id selector. (a) True (b) False
18. 18.🎯 What kind of selector is .card? (a) a class selector (b) an element selector (c) an id selector
19. 19.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) h1 (b) h2 (c) .menu (d) #star
20. 20.True or false: .card is an element selector. (a) True (b) False
21. 21.True or false: .star is a class selector. (a) True (b) False
22. 22.🎯 Which element does the selector p style? (a) <li id="hero"> (b) <h2 class="note"> (c) <h1> (d) <p class="note">
23. 23.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="hero">Hello</h2> (a) #top (b) #menu (c) .hero (d) #hero
24. 24.🎯 Which element does the selector .box style? (a) <h2 class="star"> (b) <h2 id="box"> (c) <h2 class="box"> (d) <li class="menu">
25. 25.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
26. 26.🎯 Which element does the selector h2 style? (a) <div class="big"> (b) <li> (c) <h2 class="big"> (d) <span id="top">
27. 27.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
28. 28.True or false: .big is a class selector. (a) True (b) False
29. 29.🎯 Which element does the selector .big style? (a) <p id="big"> (b) <p class="red"> (c) <h1 class="box"> (d) <p class="big">
30. 30.True or false: #top is a class selector. (a) False (b) True
31. 31.🎯 What kind of selector is .note? (a) an element selector (b) an id selector (c) a class selector
32. 32.True or false: body is an element selector. (a) False (b) True
33. 33.🎯 Which CSS selector matches this element?
    <div class="note" id="intro">Hello</div> (a) #main (b) .big (c) .note (d) #note
34. 34.🎯 Which CSS selector matches this element?
    <p class="menu" id="hero">Hello</p> (a) #menu (b) .note (c) #hero (d) h1
35. 35.🎯 Which element does the selector .box style? (a) <h1 class="box"> (b) <h1 class="star"> (c) <h1 id="box"> (d) <h2 class="menu">
36. 36.🎯 Which CSS selector matches this element?
    <div class="star" id="end">Hello</div> (a) .menu (b) span (c) .star (d) .end
37. 37.True or false: #end is an id selector. (a) False (b) True
38. 38.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) 1 (d) any number
39. 39.🎯 Which CSS selector matches this element?
    <p class="red" id="main">Hello</p> (a) p (b) #red (c) .box (d) #logo
40. 40.🎯 Which CSS selector matches this element?
    <span class="box" id="end">Hello</span> (a) #box (b) #hero (c) #end (d) .star

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