What is the primary role of system bus? Why data bus is bidirectional while address bus is unidirectional?

Q. What is the primary role of system bus? Why data bus is bidirectional while address bus is unidirectional?

Answer:-

• System bus is used to transfer data, addresses and control signals between components of the computer system.

The data bus is bidirectional because it carries data between different components for reading and writing operations. The address bus is unidirectional because it only carries the address information from the CPU to the memory or devices.