Q1. How do you set font size in CSS?

Use font-size property with units like px, em, rem, %, or keywords (small, medium, large).

Q2. What is the difference between em and rem?

em is relative to parent element's font-size, rem is relative to root (html) font-size.

Q3. What does font-style do?

font-style sets italic or oblique text. Values: normal, italic, oblique.

Q4. What is font-weight?

font-weight controls text boldness: normal (400), bold (700), or numeric values 100-900.

Q5. What is the default font size in most browsers?

Default is 16px. Users can change this in browser settings.