CSS Worksheet: Selectors Class and Id

HTML and CSS lesson 13: Selectors: element, class and id · Set 145 · 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 CSS selector matches this element?
   <h1 class="box" id="logo">Hello</h1> (a) h1 (b) .star (c) #box (d) #end
2. 2.🎯 Which CSS selector matches this element?
   <h1 class="note" id="end">Hello</h1> (a) .note (b) h2 (c) #hero (d) .end
3. 3.🎯 Which CSS selector matches this element?
   <div class="box" id="hero">Hello</div> (a) span (b) #box (c) #top (d) div
4. 4.True or false: .note is an element selector. (a) False (b) True
5. 5.🎯 Which element does the selector #intro style? (a) <p id="intro"> (b) <p id="main"> (c) <h1 class="star"> (d) <p class="intro">
6. 6.🎯 Which CSS selector matches this element?
   <div class="box" id="logo">Hello</div> (a) .logo (b) #logo (c) #box (d) span
7. 7.True or false: h1 is an element selector. (a) True (b) False
8. 8.True or false: .card is a class selector. (a) True (b) False
9. 9.🎯 Which sign starts a class selector? (a) # (b) . (c) & (d) @
10. 10.🎯 Which CSS selector matches this element?
    <span class="box" id="top">Hello</span> (a) .star (b) .top (c) #top (d) #intro
11. 11.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) h1 (b) #logo (c) #menu (d) p
12. 12.🎯 What kind of selector is .star? (a) a class selector (b) an id selector (c) an element selector
13. 13.🎯 Which CSS selector matches this element?
    <h1 class="big" id="logo">Hello</h1> (a) #big (b) h1 (c) .logo (d) .red
14. 14.🎯 Can many elements share the same class? (a) No (b) Yes
15. 15.True or false: img is an element selector. (a) False (b) True
16. 16.True or false: p is an id selector. (a) True (b) False
17. 17.🎯 Which CSS selector matches this element?
    <h1 class="box" id="logo">Hello</h1> (a) h2 (b) .logo (c) #logo (d) #box
18. 18.🎯 Which element does the selector .red style? (a) <p class="star"> (b) <span class="red"> (c) <span id="red"> (d) <span class="box">
19. 19.True or false: h1 is a class selector. (a) False (b) True
20. 20.🎯 Which element does the selector div style? (a) <p class="note"> (b) <span> (c) <div class="note"> (d) <h1 id="hero">
21. 21.🎯 Which element does the selector .star style? (a) <li class="menu"> (b) <div class="note"> (c) <li id="star"> (d) <li class="star">
22. 22.True or false: .menu is an id selector. (a) True (b) False
23. 23.🎯 Which element does the selector .star style? (a) <p class="star"> (b) <h1 class="note"> (c) <p class="menu"> (d) <p id="star">
24. 24.True or false: .note is an id selector. (a) False (b) True
25. 25.True or false: #top is an element selector. (a) False (b) True
26. 26.🎯 Which element does the selector h2 style? (a) <div class="note"> (b) <h2 class="note"> (c) <span id="logo"> (d) <li>
27. 27.🎯 Which CSS selector matches this element?
    <h1 class="box" id="hero">Hello</h1> (a) #box (b) #hero (c) h2 (d) .hero
28. 28.🎯 Which CSS selector matches this element?
    <p class="menu" id="main">Hello</p> (a) #logo (b) #main (c) #menu (d) .main
29. 29.🎯 Which CSS selector matches this element?
    <span class="big" id="intro">Hello</span> (a) #big (b) span (c) p (d) .red
30. 30.🎯 How many elements on a page should have the same id? (a) 2 (b) any number (c) 1 (d) 5
31. 31.🎯 Which sign starts an id selector? (a) @ (b) # (c) & (d) .
32. 32.🎯 Which CSS selector matches this element?
    <h1 class="star" id="intro">Hello</h1> (a) #intro (b) .menu (c) #star (d) .intro
33. 33.🎯 Which element does the selector .box style? (a) <h1 class="box"> (b) <h1 class="star"> (c) <h1 id="box"> (d) <h2 class="menu">
34. 34.🎯 Which CSS selector matches this element?
    <h1 class="box" id="end">Hello</h1> (a) #box (b) h1 (c) .star (d) #hero
35. 35.🎯 Which element does the selector h2 style? (a) <span id="end"> (b) <li> (c) <div class="star"> (d) <h2 class="star">
36. 36.🎯 Which element does the selector #top style? (a) <p id="top"> (b) <p id="intro"> (c) <h1 class="red"> (d) <p class="top">
37. 37.🎯 Which element does the selector .big style? (a) <h1 class="box"> (b) <p id="big"> (c) <p class="big"> (d) <p class="red">
38. 38.🎯 Which element does the selector .big style? (a) <div class="box"> (b) <li class="big"> (c) <li class="red"> (d) <li id="big">
39. 39.🎯 Which CSS selector matches this element?
    <li class="menu" id="logo">Hello</li> (a) #menu (b) div (c) .note (d) .menu
40. 40.True or false: .menu is an element selector. (a) False (b) True

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