CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 620 · 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: h1 is an element selector. (a) False (b) True
2. 2.🎯 Which element does the selector li style? (a) <div> (b) <p id="intro"> (c) <li class="star"> (d) <span class="star">
3. 3.🎯 Which CSS selector matches this element?
   <h2 class="big" id="top">Hello</h2> (a) #intro (b) .big (c) .top (d) .red
4. 4.🎯 Which CSS selector matches this element?
   <span class="big" id="main">Hello</span> (a) #logo (b) .red (c) #main (d) p
5. 5.🎯 Which CSS selector matches this element?
   <span class="star" id="logo">Hello</span> (a) .menu (b) #logo (c) p (d) #star
6. 6.🎯 What kind of selector is p? (a) a class selector (b) an element selector (c) an id selector
7. 7.🎯 What kind of selector is #end? (a) an id selector (b) an element selector (c) a class selector
8. 8.🎯 Which CSS selector matches this element?
   <h1 class="big" id="hero">Hello</h1> (a) #big (b) h2 (c) #hero (d) .hero
9. 9.True or false: .big is a class selector. (a) False (b) True
10. 10.🎯 Which CSS selector matches this element?
    <p class="menu" id="intro">Hello</p> (a) .intro (b) #menu (c) p (d) h1
11. 11.🎯 Which element does the selector #end style? (a) <h2 id="end"> (b) <li class="box"> (c) <h2 id="hero"> (d) <h2 class="end">
12. 12.🎯 What kind of selector is .big? (a) an element selector (b) an id selector (c) a class selector
13. 13.🎯 What kind of selector is #logo? (a) an id selector (b) an element selector (c) a class selector
14. 14.🎯 Which CSS selector matches this element?
    <h2 class="big" id="intro">Hello</h2> (a) #main (b) .red (c) .big (d) .intro
15. 15.🎯 What kind of selector is h1? (a) an id selector (b) a class selector (c) an element selector
16. 16.🎯 Which CSS selector matches this element?
    <p class="big" id="top">Hello</p> (a) #intro (b) #big (c) .big (d) h1
17. 17.🎯 Which CSS selector matches this element?
    <li class="red" id="hero">Hello</li> (a) li (b) #top (c) .hero (d) div
18. 18.🎯 What kind of selector is #main? (a) a class selector (b) an element selector (c) an id selector
19. 19.🎯 What kind of selector is li? (a) an element selector (b) an id selector (c) a class selector
20. 20.🎯 Which element does the selector #logo style? (a) <p class="logo"> (b) <h1 class="note"> (c) <p id="end"> (d) <p id="logo">
21. 21.🎯 How many elements on a page should have the same id? (a) 5 (b) any number (c) 1 (d) 2
22. 22.🎯 Which CSS selector matches this element?
    <span class="menu" id="hero">Hello</span> (a) p (b) #top (c) #hero (d) #menu
23. 23.🎯 Which element does the selector span style? (a) <h1 class="red"> (b) <h2 id="logo"> (c) <span class="red"> (d) <p>
24. 24.🎯 What kind of selector is .star? (a) an element selector (b) an id selector (c) a class selector
25. 25.🎯 Which element does the selector #logo style? (a) <div class="red"> (b) <li id="end"> (c) <li class="logo"> (d) <li id="logo">
26. 26.🎯 Which CSS selector matches this element?
    <h1 class="box" id="logo">Hello</h1> (a) h2 (b) .logo (c) .star (d) .box
27. 27.🎯 Which element does the selector .box style? (a) <h2 id="box"> (b) <h2 class="star"> (c) <li class="menu"> (d) <h2 class="box">
28. 28.🎯 Which sign starts a class selector? (a) @ (b) # (c) . (d) &
29. 29.🎯 What kind of selector is .menu? (a) an id selector (b) an element selector (c) a class selector
30. 30.True or false: #main is an id selector. (a) False (b) True
31. 31.🎯 Which sign starts an id selector? (a) @ (b) & (c) . (d) #
32. 32.🎯 Which CSS selector matches this element?
    <li class="note" id="top">Hello</li> (a) .top (b) #note (c) .note (d) div
33. 33.🎯 Which element does the selector .menu style? (a) <span class="menu"> (b) <p class="big"> (c) <span id="menu"> (d) <span class="note">
34. 34.True or false: #hero is an id selector. (a) True (b) False
35. 35.🎯 Which element does the selector .star style? (a) <h1 id="star"> (b) <h2 class="note"> (c) <h1 class="menu"> (d) <h1 class="star">
36. 36.🎯 Can many elements share the same class? (a) No (b) Yes
37. 37.🎯 Which CSS selector matches this element?
    <div class="star" id="main">Hello</div> (a) .menu (b) div (c) #star (d) span
38. 38.🎯 What kind of selector is #top? (a) a class selector (b) an id selector (c) an element selector
39. 39.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) h2 (b) h1 (c) .star (d) #hero
40. 40.🎯 Which CSS selector matches this element?
    <h1 class="box" id="top">Hello</h1> (a) .star (b) #intro (c) h1 (d) h2

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