36. Which attribute is used to specify an external CSS file in HTML?
a) src
b) style
c) link
d) href
37. Which tag is used to create a bulleted list in HTML?
a) <ol>
b) <li>
c) <ul>
d) <dl>
38. Which company is the creator of the PHP programming language?
a) Facebook
b) Microsoft
c) Oracle
d) PHP Group
39. Which property is used to align content vertically in CSS?
a) align
b) justify
c) vertical-align
d) flex
40. Which tag is used to define a header in HTML?
a) <header>
b) <h1>
c) <head>
d) <heading>