explain Process States and Process Control Block (PCB), Basic Computer Science

Process States
Throughout the lifespan of a process, its execution position may be in one of four states: (linked with each state is generally a queue on which the process resides)
1. Executing: the process is at present running and has control of a CPU
2. Waiting: the process is at present able to run, but must wait until a CPU becomes available
3. Blocked: the process is at present waiting on I/O, either for input to arrive or output to be sent
4. Suspended: the process is at present able to run, but for some reason the OS has not placed the process on the prepared queue
5. Ready: the process is in memory, will execute specified CPU time.
Process Control Block (PCB)
If the OS allows multiprogramming, then it requires keeping track of all the processes. For every process, its process control block PCB is used to track the process''s execution status, together with the following:
1. Its present processor register contents
2. Its processor state (if it is blocked or set)
3. Which resources have been allocated to it
4. Its memory state
5. A pointer to its stack

6. Which resources it needs
Posted Date: 5/2/2012 5:54:44 AM | Location : United States







Related Discussions:- explain Process States and Process Control Block (PCB), Assignment Help, Ask Question on explain Process States and Process Control Block (PCB), Get Answer, Expert's Help, explain Process States and Process Control Block (PCB) Discussions

Write discussion on explain Process States and Process Control Block (PCB)
Your posts are moderated
Related Questions
In any program it is essential to move the data in the memory and in the CPU registers; there are a number of ways to do this: it can copy data in the memory to a number of registe

Question 1 Discuss the two basic operational characteristics of RR Only an active route is redistributed Route redistribution does not impact local route selection

board coloring

You can also allocate a single value to several variables at the same time. For instance: X=y=z =1 Now, an integer object is generated with the value 1, and all three variables are

Example of autonomous rational agents-Artificial intelligence The procedure of waste water treatment After the level of pollutants in waste water is find out,  following 5

Cathode Ray Tube Monitors (CRT): Monitors display what is going on in your computer. They can run at various resolutions. It is the part of computer which looks like a TV set.

c program to convert S to palindromes with minimum number of character replacements

WHAT IS MULTIPLE CONTIGUOUS VARIABLE PARTITIONING

What is CAI? Explain its pitfalls

classify computer system according to capacity. how they are different from computer according to the classification of technology.provide the comparative study also.