CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 174 · 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.🎯 Which CSS selector matches this element?
   <h2 class="note" id="top">Hello</h2> (a) #top (b) #note (c) #intro (d) li
3. 3.🎯 Which element does the selector .note style? (a) <span class="note"> (b) <span class="big"> (c) <span id="note"> (d) <p class="red">
4. 4.True or false: .big is a class selector. (a) True (b) False
5. 5.🎯 Which sign starts an id selector? (a) . (b) # (c) & (d) @
6. 6.🎯 Which CSS selector matches this element?
   <li class="box" id="hero">Hello</li> (a) div (b) #box (c) .hero (d) #hero
7. 7.🎯 Which CSS selector matches this element?
   <h2 class="big" id="hero">Hello</h2> (a) #top (b) .red (c) li (d) .big
8. 8.🎯 Which element does the selector .box style? (a) <span class="star"> (b) <span id="box"> (c) <p class="menu"> (d) <span class="box">
9. 9.🎯 What kind of selector is .note? (a) a class selector (b) an id selector (c) an element selector
10. 10.🎯 How many elements on a page should have the same id? (a) 5 (b) 2 (c) 1 (d) any number
11. 11.🎯 Which CSS selector matches this element?
    <h2 class="box" id="logo">Hello</h2> (a) li (b) h2 (c) .star (d) #box
12. 12.True or false: li is an id selector. (a) False (b) True
13. 13.🎯 Which element does the selector .red style? (a) <h1 class="box"> (b) <h2 class="star"> (c) <h1 id="red"> (d) <h1 class="red">
14. 14.True or false: #logo is an id selector. (a) False (b) True
15. 15.🎯 Which element does the selector #end style? (a) <div class="menu"> (b) <li class="end"> (c) <li id="hero"> (d) <li id="end">
16. 16.🎯 Which CSS selector matches this element?
    <h1 class="note" id="end">Hello</h1> (a) .end (b) #end (c) #hero (d) #note
17. 17.🎯 Can many elements share the same class? (a) No (b) Yes
18. 18.🎯 What kind of selector is p? (a) an id selector (b) a class selector (c) an element selector
19. 19.🎯 Which element does the selector .big style? (a) <h2 class="red"> (b) <h2 id="big"> (c) <li class="box"> (d) <h2 class="big">
20. 20.🎯 Which CSS selector matches this element?
    <div class="box" id="top">Hello</div> (a) #box (b) .box (c) span (d) #intro
21. 21.True or false: .star is a class selector. (a) False (b) True
22. 22.True or false: .note is a class selector. (a) True (b) False
23. 23.🎯 What kind of selector is h1? (a) a class selector (b) an element selector (c) an id selector
24. 24.🎯 What kind of selector is #main? (a) an id selector (b) a class selector (c) an element selector
25. 25.🎯 What kind of selector is .card? (a) an element selector (b) a class selector (c) an id selector
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="note" id="top">Hello</h1> (a) .big (b) #intro (c) .top (d) h1
27. 27.🎯 What kind of selector is li? (a) a class selector (b) an element selector (c) an id selector
28. 28.🎯 Which CSS selector matches this element?
    <h1 class="menu" id="end">Hello</h1> (a) .menu (b) #menu (c) .note (d) #hero
29. 29.🎯 What kind of selector is #logo? (a) an element selector (b) an id selector (c) a class selector
30. 30.🎯 Which CSS selector matches this element?
    <span class="star" id="end">Hello</span> (a) .menu (b) #hero (c) p (d) .star
31. 31.True or false: #end is a class selector. (a) False (b) True
32. 32.🎯 Which element does the selector .box style? (a) <li class="menu"> (b) <h2 class="star"> (c) <h2 id="box"> (d) <h2 class="box">
33. 33.True or false: img is a class selector. (a) True (b) False
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="big" id="top">Hello</h1> (a) h1 (b) #big (c) .red (d) h2
35. 35.True or false: p is an element selector. (a) True (b) False
36. 36.🎯 What kind of selector is .big? (a) an id selector (b) an element selector (c) a class selector
37. 37.True or false: p is a class selector. (a) True (b) False
38. 38.True or false: h1 is an element selector. (a) False (b) True
39. 39.True or false: img is an id selector. (a) True (b) False
40. 40.🎯 Which CSS selector matches this element?
    <li class="note" id="hero">Hello</li> (a) div (b) #hero (c) #top (d) .big

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