Ans. It is the age of digital electronics. Today, nearly all electronic devices - from cell phone to computer use digital circuits. The main reason for the change from analogue to digital is because digital devices are more reliable, flexible, portable and more compact in size as compared to analogue devices. Also digital signals are easier to transmit and are more secure than analogue signals.
Digital circuits are less affected by noise digital systems, interface well with computers and are easy to control with software. Information storage in digital form is easy. Also digital devices are more accurate and precise in measuring "different quantities.
Due to the above mentioned features of digital devices, digital-electronics has advantages over analogue electronics.