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Tag Archives: Operating Systems-Input Output Systems

A buffer is a memory area that stores data being transferred between two devices or between a device and an application. Uses of I/O Buffering… Read More
Computer system operates the computation on the digital signals but the user sends analog signals to the computer system. Interface Units are basically used for… Read More
I/O Software is used for interaction with I/O devices like mouse, keyboard, USB devices, printers, etc. I/O software are organized in following ways: User Level… Read More
Prerequisite – File Systems When a file is used, information is read and accessed into computer memory and there are several ways to access this information… Read More
A directory is a container that is used to contain folders and files. It organizes files and folders in a hierarchical manner.  There are several… Read More
In operating systems, Memory Management is the function responsible for allocating and managing computer’s main memory. Memory Management function keeps track of the status of… Read More
In operating systems, Memory Management is the function responsible for allocating and managing computer’s main memory. Memory Management function keeps track of the status of… Read More
Put the following disk scheduling policies results in minimum amount of head movement. (A) FCFS (B) Circular SCAN (C) Elevator Answer: (C) Explanation: Circular scanning… Read More
Normally user programs are prevented from handling I/O directly by I/O instructions in them. For CPUs having explicit I/O instructions, such I/O protection is ensured… Read More
From amongst the following given scenarios determine the right one to justify interrupt mode of data-transfer: Source: nptel (A) Bulk transfer of several kilo-byte (B)… Read More
We describe a protocol of input device communication below. a. Each device has a distinct address b. The bus controller scans each device in sequence… Read More
Which of the following is major part of time taken when accessing data on the disk? (A) Settle time (B) Rotational latency (C) Seek time… Read More