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Virtual file systems
The file-system execution having of three major layers. The first layer is the file-system interface, based on the open, read, write and close calls and file descriptors.
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
Elimination of common sub expression during code optimization An optimizing transformation is a rule for rewriting a section of a program to enhance its execution efficiency wi
Q. Consider a calculating environment where a process is given the privilege of accessing object only n times. Suggest a scheme for implementing this policy. Answer: Add an i
List operations to be performed on directories. Search for a file, delete a file, create a file, list a directory, rename a file, and traverse the file system.
Explain about threading issues? The fork and exec system calls In a multithreaded program of few UNIX systems have chosen to have two versions of fork, one that duplicates e
USER-LEVEL THREADS (ULT) In this level the kernel isn't aware of the existence of threads -- All thread management is complete by the application by using a thread library. Th
Determine a component of a process precedence sequence Process name, Sequence operator ‘;’ and Concurrency operator ‘,’
Question: (a) Answer the following questions based on the code snippet below. 1. int main (int argc, char *argv[]) 2. { 3. 4. pid_t processId; 5. 6. processId =
A paper mill produces two grades of paper viz., X and Y. Because of raw material restrictions, it cannot produce more than 400 tons of grade X paper and 300 tons of grade Y paper i
What are the differences between process and thread? The fundamental difference between a process and a thread is that a process has an entire copy of the program to itself and
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