CSS Worksheet: Selectors Class and Id

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

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