Operating System Services
Operating system provides some services to the programs and to the users. These operating system services can be divided into two broad categories:
What is Operating System?
What is operating system? “An operating system is an interface between the user and the hardware.” Example: Windows, Android
Program for wait() system call
When a process creates a child process, sometimes it becomes necessary that the parent process should execute only after the child has finished. wait() system call does exactly this. It makes the parent process wait for child process to finish and then the parent continues its working from the statement after the wait().To be exact …
Microsoft’s $100000 bounty challenge
Microsoft’s $100000 bounty challenge is a three-month bounty program of $100,000 to anyone who can hack its custom Linux OS. According, to
Solved Questions based on CPU Scheduling
Here we discuss some solved questions based on CPU Scheduling Algorithms. These problems have been asked in previous GATE examinations. Q1. Three process P1, P2 and P3 arrive at time zero. The total time spent by the process in the system is 10ms, 20ms, and 30ms respectively. They spent first 20% of their execution time …
Top 7 Features in Ubuntu 20.04
Ubuntu 20.04LTS AKA Focal Fossa is now available. It was officially released on 23rd April, 2020. The top 7 features in Ubuntu 20.04 include
Banker’s Algorithm
Banker’s Algorithm – is a technique used for deadlock avoidance when there are multiple instances of a resource.
Program for dup() system call
dup() system call is used to duplicate a file descriptor. It creates a copy of the old file descriptor to a new file descriptor.
lseek() system call
lseek() system call repositions the read/write file offset i.e., it changes the positions of the read/write pointer within the file. In every file any
Program on open() system call
The open() system call is used to get the file descriptor of any file. To understand the working of open() system call lets