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What is the use of boot block?
For a computer to begin running when powered up or rebooted it requires having an initial program to run. This bootstrap program tends to be easy. It finds the operating system on the disk loads that kernel into memory and jumps to a first address to start the operating system execution. The full bootstrap program is kept in a partition called the boot blocks, at fixed location on the disk. A disk that has boot partition is known as boot disk or system disk.
How do we overcome the disadvantages of the two-level directory? Give links from one user directory to another, creating path names; system files become available by letting th
Which is most common phase structured grammar? Most common phase structured grammar is Context – Sensitive
With software algorithms for mutual exclusion, such as Dekker's algorithm, Peterson's algorithm, or Lamport's bakery algorithm, note that optimizing compilers and out-of-order exec
Synchronization In communication among processes messages passed may be blocking or nonblocking - also called as synchronous and asynchronous. Blocking send : The sending pr
Unix process API The two most important function calls to use when programming with several processes are fork and exec: fork() creates a copy of current process. It gives
The procedure for handling the page fault is as follows 1. We check the internal table to verify whether the reference was valid or invalid. 2. If the reference was invalid,
File structure Certain files must conform to a needed structure that is understood by the operating system. The operating system may consist that an executable file has a parti
What is meant by arm-stickiness? If one or a few processes have a high access rate to data on single track of a storage disk, then they might be monopolizing the device by repe
What are scheduling queues? Since the processes enter the system they are put into job queue. This queue contains all processes in the system. The processes that are exist in m
Describe swapping technique in UNIX systems. Swapping is used to control memory contention among processes. If there is excessively much memory contention, processes are swappe
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