CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 408 · 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.🎯 What kind of selector is #top? (a) an element selector (b) a class selector (c) an id selector
3. 3.🎯 Which CSS selector matches this element?
   <li class="big" id="logo">Hello</li> (a) #end (b) #logo (c) .logo (d) #big
4. 4.🎯 What kind of selector is #end? (a) a class selector (b) an element selector (c) an id selector
5. 5.🎯 Which CSS selector matches this element?
   <h2 class="menu" id="top">Hello</h2> (a) #intro (b) .top (c) li (d) #top
6. 6.True or false: #logo is a class selector. (a) False (b) True
7. 7.🎯 Which CSS selector matches this element?
   <li class="red" id="top">Hello</li> (a) #intro (b) .red (c) div (d) #red
8. 8.🎯 Which CSS selector matches this element?
   <span class="big" id="top">Hello</span> (a) .top (b) .red (c) #top (d) #intro
9. 9.🎯 How many elements on a page should have the same id? (a) 5 (b) 1 (c) any number (d) 2
10. 10.🎯 Which element does the selector .menu style? (a) <h2 class="big"> (b) <h1 class="note"> (c) <h1 id="menu"> (d) <h1 class="menu">
11. 11.True or false: #main is an element selector. (a) True (b) False
12. 12.🎯 Which CSS selector matches this element?
    <h2 class="box" id="hero">Hello</h2> (a) .box (b) #box (c) .hero (d) li
13. 13.🎯 Which sign starts an id selector? (a) & (b) . (c) @ (d) #
14. 14.True or false: #end is an element selector. (a) True (b) False
15. 15.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) .end (b) #end (c) .star (d) #box
16. 16.True or false: .star is a class selector. (a) False (b) True
17. 17.🎯 Which element does the selector .big style? (a) <h1 class="red"> (b) <h1 id="big"> (c) <h2 class="box"> (d) <h1 class="big">
18. 18.🎯 Which CSS selector matches this element?
    <div class="big" id="end">Hello</div> (a) span (b) .red (c) .end (d) div
19. 19.🎯 Which CSS selector matches this element?
    <p class="menu" id="logo">Hello</p> (a) .logo (b) .note (c) .menu (d) #end
20. 20.🎯 Which element does the selector #top style? (a) <h1 id="intro"> (b) <h2 class="note"> (c) <h1 id="top"> (d) <h1 class="top">
21. 21.🎯 Which element does the selector p style? (a) <h2 class="note"> (b) <p class="note"> (c) <h1> (d) <li id="main">
22. 22.🎯 Which element does the selector li style? (a) <p id="main"> (b) <div> (c) <li class="box"> (d) <span class="box">
23. 23.True or false: li is an element selector. (a) True (b) False
24. 24.🎯 What kind of selector is #logo? (a) a class selector (b) an id selector (c) an element selector
25. 25.🎯 Which CSS selector matches this element?
    <h2 class="star" id="hero">Hello</h2> (a) .menu (b) .hero (c) li (d) .star
26. 26.🎯 Which CSS selector matches this element?
    <span class="box" id="main">Hello</span> (a) #main (b) .main (c) .star (d) #box
27. 27.🎯 What kind of selector is p? (a) a class selector (b) an element selector (c) an id selector
28. 28.True or false: .star is an id selector. (a) True (b) False
29. 29.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1> (a) h1 (b) .logo (c) #big (d) .red
30. 30.🎯 Which element does the selector #end style? (a) <h1 class="star"> (b) <p id="end"> (c) <p class="end"> (d) <p id="hero">
31. 31.True or false: img is an id selector. (a) False (b) True
32. 32.🎯 What kind of selector is h1? (a) an element selector (b) an id selector (c) a class selector
33. 33.🎯 What kind of selector is .menu? (a) an id selector (b) a class selector (c) an element selector
34. 34.🎯 What kind of selector is .card? (a) an element selector (b) an id selector (c) a class selector
35. 35.🎯 Which element does the selector .red style? (a) <p class="box"> (b) <p class="red"> (c) <h1 class="star"> (d) <p id="red">
36. 36.🎯 Which CSS selector matches this element?
    <div class="menu" id="intro">Hello</div> (a) span (b) .note (c) #intro (d) .intro
37. 37.🎯 Can many elements share the same class? (a) No (b) Yes
38. 38.🎯 Which CSS selector matches this element?
    <p class="star" id="logo">Hello</p> (a) .menu (b) #end (c) h1 (d) #logo
39. 39.True or false: img is an element selector. (a) False (b) True
40. 40.🎯 Which CSS selector matches this element?
    <h2 class="big" id="top">Hello</h2> (a) .big (b) li (c) .top (d) #big

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