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All components of computer communicate with processor by the system bus. Which means I/O devices required to be attached to system bus. But I/O devices aren't connected directly to computer's system bus. In its place they are attached to an intermediate electronic device interface known as a device controller that in turn is attached to system bus. Therefore a device controller is an interface between a system bus and an I/O device. On one side it knows how to communicate with I/O device associated to it and on the other it knows how to communicate with computer's CPU or processor and memory via the system bus.
What is meant by hotspots? A Hotspot is a list area where the mouse pointer appears as an upright hand symbol. When a user points to that area (and the hand cursor is active),
What are privileged instructions? Some of the machine instructions that might cause harm to a system are designated as privileged instructions. The hardware permits the privil
Constant Current Sources An ideal constant current source delivers a given current to a circuit regardless of the voltage required to do so. . Constant current supplies are r
Fourth Generation (1972-1984) The next generation of computer systems used the large scale integration (LSI -1000 devices per chip) and very large scale integration (VLSI - 100
What is partition? Partitions divide a system into several independent or weakly coupled subsystems, each giving one kind of service. Partitions use peer-peer subsystems.
Q. Explain about Operand Address Calculation? In actual machines effective address can be a register address, memory or I/O port address. Register reference instructions for ex
How is communication between computers established in Internet. What characteristics need to be defined in a communication protocol? Explain the physical and logical paths in a com
a. What are the differences among conventional signatures and digital signatures? Write a short note on "Attacks on digital signature". b. What is Public-Key Infrastructures
Illustrate the term EDI Trading Patterns? EDI Trading Patterns are illustrated below: a. Hubs and Spokes: Several of the prime movers into the adoption of Electronic Da
Use the Rational Administrator to: * Make and manage projects. * Make a project under configuration management. * Make a project outside of configuration management.
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