CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 797 · 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 element does the selector #main style? (a) <p class="main"> (b) <h1 class="menu"> (c) <p id="main"> (d) <p id="logo">
2. 2.🎯 What kind of selector is .menu? (a) an element selector (b) a class selector (c) an id selector
3. 3.🎯 Can many elements share the same class? (a) No (b) Yes
4. 4.🎯 Which sign starts a class selector? (a) . (b) & (c) # (d) @
5. 5.True or false: .big is a class selector. (a) True (b) False
6. 6.🎯 Which CSS selector matches this element?
   <p class="big" id="end">Hello</p> (a) .red (b) .end (c) p (d) h1
7. 7.True or false: #main is a class selector. (a) True (b) False
8. 8.🎯 What kind of selector is .note? (a) an element selector (b) a class selector (c) an id selector
9. 9.🎯 Which element does the selector #top style? (a) <h1 id="intro"> (b) <h2 class="box"> (c) <h1 class="top"> (d) <h1 id="top">
10. 10.🎯 Which element does the selector #main style? (a) <h1 class="main"> (b) <h2 class="red"> (c) <h1 id="main"> (d) <h1 id="logo">
11. 11.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
12. 12.🎯 Which CSS selector matches this element?
    <p class="box" id="end">Hello</p> (a) .end (b) .star (c) h1 (d) p
13. 13.🎯 Which CSS selector matches this element?
    <h2 class="menu" id="intro">Hello</h2> (a) .intro (b) h2 (c) #menu (d) li
14. 14.🎯 Which element does the selector .star style? (a) <p class="note"> (b) <span class="menu"> (c) <span class="star"> (d) <span id="star">
15. 15.True or false: body is a class selector. (a) True (b) False
16. 16.🎯 Which element does the selector #intro style? (a) <p id="main"> (b) <p class="intro"> (c) <h1 class="red"> (d) <p id="intro">
17. 17.🎯 Which element does the selector li style? (a) <div> (b) <span class="red"> (c) <p id="top"> (d) <li class="red">
18. 18.True or false: .menu is a class selector. (a) True (b) False
19. 19.🎯 Which CSS selector matches this element?
    <div class="red" id="top">Hello</div> (a) #red (b) div (c) span (d) .top
20. 20.🎯 How many elements on a page should have the same id? (a) 1 (b) 2 (c) any number (d) 5
21. 21.🎯 Which element does the selector p style? (a) <li id="hero"> (b) <h2 class="menu"> (c) <h1> (d) <p class="menu">
22. 22.🎯 Which CSS selector matches this element?
    <span class="box" id="logo">Hello</span> (a) span (b) #end (c) #box (d) p
23. 23.🎯 Which element does the selector h1 style? (a) <h2> (b) <li class="big"> (c) <div id="intro"> (d) <h1 class="big">
24. 24.🎯 What kind of selector is #top? (a) an id selector (b) a class selector (c) an element selector
25. 25.🎯 Which CSS selector matches this element?
    <div class="big" id="top">Hello</div> (a) .red (b) .big (c) #big (d) span
26. 26.🎯 Which CSS selector matches this element?
    <h2 class="box" id="main">Hello</h2> (a) #logo (b) #main (c) .star (d) #box
27. 27.🎯 Which CSS selector matches this element?
    <li class="big" id="main">Hello</li> (a) #logo (b) #main (c) .red (d) .main
28. 28.🎯 Which element does the selector #logo style? (a) <span class="logo"> (b) <span id="end"> (c) <span id="logo"> (d) <p class="red">
29. 29.🎯 What kind of selector is .big? (a) a class selector (b) an element selector (c) an id selector
30. 30.🎯 What kind of selector is .star? (a) an id selector (b) a class selector (c) an element selector
31. 31.🎯 What kind of selector is #hero? (a) a class selector (b) an element selector (c) an id selector
32. 32.True or false: .star is an id selector. (a) True (b) False
33. 33.🎯 Which CSS selector matches this element?
    <h1 class="note" id="intro">Hello</h1> (a) h1 (b) .big (c) #main (d) .intro
34. 34.🎯 Which CSS selector matches this element?
    <h2 class="star" id="logo">Hello</h2> (a) #logo (b) li (c) #star (d) #end
35. 35.True or false: .big is an element selector. (a) True (b) False
36. 36.🎯 What kind of selector is li? (a) an id selector (b) a class selector (c) an element selector
37. 37.🎯 Which CSS selector matches this element?
    <h2 class="box" id="intro">Hello</h2> (a) #box (b) #main (c) #intro (d) .intro
38. 38.🎯 Which sign starts an id selector? (a) @ (b) . (c) & (d) #
39. 39.🎯 What kind of selector is img? (a) an id selector (b) an element selector (c) a class selector
40. 40.🎯 Which CSS selector matches this element?
    <p class="star" id="hero">Hello</p> (a) .star (b) .hero (c) h1 (d) #top

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