What is responsive design? What is the difference between fixed and fluid layouts?

What is responsive design? What is the difference between fixed and fluid layouts?

Responsive Design is the approach to web design that makes web pages works well on the enormous devices, irrespective of the device size.
Fixed Layout has a fixed width. The components inside it, may have either percentage widths.
Fluid Layout also refer to as liquid layout. It adjust to the user’s screen resolution.