SSC IMD SA 2017 – Question 126

Which of the following statements is true?

• A controller is a collection of electronics that can operate a port, bus or device.
• A driver is a collection of electronics that can operate a port, bus or device.
• A host is a collection of electronics that can operate a port, bus or device.
• A bus is a collection of electronics that can operate a port, bus or device.

Detailed Explanation:

The correct answer is a) A controller is a collection of electronics that can operate a port, bus or device. (एक कंट्रोोलर इलेक्ट्रॉॉनिक्स का एक संग्रह है जो एक पोर्ट, बस या डिवाइस को संचालित कर सकता है।).

I/O System Architecture Components:

• Controller: In computer hardware and operating system theory (e.g., Silberschatz OS Concepts), a controller is a collection of specialized electronic hardware (processors, microchips, data/status registers) that directly operates and manages the physical signals of a port, bus, or peripheral device (e.g., SATA disk controller, USB controller, serial port controller).
• Driver (Device Driver): A software module inside the operating system kernel that provides a standardized programming interface between the OS and the device controller.
• Host: The primary computing unit (CPU and main memory) that issues high-level commands to controllers.
• Bus: A physical medium comprising data, address, and control lines governed by transmission protocols.