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Briefly discuss on I/O hardware?
A controller is a collection of electronics that can operate a port, a bus, or a device. A serial-port controller is an easy controller. It is a single chip in the computer that controls the signals the signal on the wires of a serial port. The device control registers are mapped into the address space of the processor. The CPU implements I/O requests using the standard data transfer instructions to read and write the device-control registers. An I/O port having of
a. Status register
b. Control register
c. Data-in register
d. Data-out register
Define I/O and CPU Bursts Applications typically to through cycle of CPU bursts and Input/output bursts. Since the CPU sits idle during I/O operations, efficiency is improved
Q. Consider the subsequent page reference string: 1, 2, 3, 4, 2, 1, 5, 6, 2, 1, 2, 3, 7, 6, 3, 2, 1, 2, 3, 6. How many page faults would take place for the following replace
Define the TlsFree(TLSIndex) Function This function should be called to free a TLSindex allocated by TlsAlloc. It would be executed when there are no more threads in a process
What is the use of FIFOs in client-server applications
what is the use of valid invalid bits in paging
Q. What is the use of system calls? Answer: System calls permit user-level processes to request services of the operating system.
Some CPUs provide for more than two modes of operation. What are two possible uses of these multiple modes?
What is Two-level directory In the two-level directory structure every user has own user file directory (UFD). When a user jobs begins or a user logs in, the system's master fi
WHAT IS OPERATING SYSTEM ?ENLIST AND EXPLAIN BASIC SERVICES PROVIDE BY OS
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