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Last Update: November 08, 2008 Asked by: Debajyoti Ghosh |
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Submitted by: sk_seeker Execution contexts can be of two types: thread/process context OR an Interrupt context. What this means is that to execute code, one has to be in a thread context or a an Interrupt context. OS code or any code for that matter has no context. It is the execution stream that has a context. So, whenever we are executing OS code, we are doing so on behalf of one of the two contexts mentioned above.
The behavior of the OS is controlled by user requests via system calls, by interrupt requests and by the policy and mechanisms put in place to manage resources, provide protection, etc.
Above answer was rated as good by the following members: UncaAlby |  Latest Answer : process is program under execution.Program is only a set of instructions and process is a program in memory. Thread is a basic unit of execution within a process. This means program is something which is not loaded in memory yet. And ... Latest Answer : process system timeTime taken for a process to execute in terms of BIOS/System time.process waiting time When a process is waiting for a resources/interrupts togo into 'RUN' state.process CPU timeProcess execution time in terms of CPU clock time. ... Latest Answer : no ...
What is "Environment variable" in unix and what is command for set environment variables? What is command for list Processes with the highest CPU usage? What is command To Move Background job that has been suspended? What is command for to check disk space? How to find out what program is running now in unix? Latest Answer : Thread:Thread is separate path of excution which R functionally indepedent of each other.Process: A program in excution is called process.Task: In ptrogram contains tasks.Each task is nothing but job. ... Latest Answer : The possiblities of Deadlock are Mutual Exclusion,hold &wait,No preemption and Circularwait ... Latest Answer : 1.POST 2.The MBR reads the boot sector which is the first sector of the active partition.3.Ntldr locket path of os from boot.ini4.Ntldr to run ntdedetect.com to get information about installed hardware.5.Ntldr reads the registry files then select ... Latest Answer : Provide the details of need. ...
If the OS is just a collection pf programs and if it is executed by the processor just like any other program, is the OS a process? If so, how is it controlled? ? Can we execute a program with out installing Operating system? If yes, how it can be done? Latest Answer : yesusing EPROM ...
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