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Define System Call
A system call is a request that is made by any program to the operating system for carrying out tasks - picked from a predefined set - which the said program does not have needed authorizations to execute in its own flow of execution. System calls offer the interface among a process and the operating system. Several operations interacting with the system need permissions not available to a user level process, for example I/O performed with a device present on the system or any form of communication with other processes needs the use of system calls.
A file system depends on data structures about the files, beside the file structure. The former is named metadata-data that defines data. Each file is accumulated with an inode, wh
What are the various categories of software? System software Application software Engineering/Scientific software Embedded software Web Applications Artificial I
Regard as a computer system that runs 5000 jobs per month with no deadlock-prevention or deadlock-avoidance scheme. Deadlocks take place about twice per month and the operator must
Determine a component of a process precedence sequence Process name, Sequence operator ‘;’ and Concurrency operator ‘,’
This exercise uses a graph-plotting program ( gnuplot ) to convert tabular data into an image. This is a technique that is very widely used to visualize scientific data; with app
Contiguous allocation: Every file will be allocated contiguous space in the memory. Allow the block size be 1K If a 50K files desires to be allocated space after t
define monolathic structure
How can an index file be used to speed up the access in direct-access files? Have an index in memory; the index gives the key and the disk location of its corresponding record.
Consider a scenario of post mailbox, there are two processes named sender S and receiver R. Both processes can communicate with each other by name along with message. You need to I
Q. What are the major differences between operating systems for mainframe computers and personal computers? Answer: In general operating systems for batch systems have simpler
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