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Question:
a) Each process is represented in the operating system by a process control block (PCB). The PCB contains many pieces of information associated with a specific process. List and describe four pieces of information that can be found in a PCB.
b) Differentiate between an independent process and a cooperating process.
c) List the advantages of process cooperation.
d) i. Briefly describe the producer-consumer problem within the concept of cooperating processes.
ii. To allow producer and consumer processes to run concurrently, there must be a buffer for holding items. The buffer can be filled by the producer and emptied by the consumer, and there are two types of buffer available for this purpose. Describe these two types of buffer.
What is scheduler? A process migrates among the various scheduling queues throughout its life time. The OS must choose processes from these queues in some fashion. This selecti
Deadlock Detection and Recovery It's a method of permitting the system to enter a deadlock state, detect it and then recover. Deadlock detection : Is the process of
Q. What is the major advantage of the layered approach to system design? What are the de-merits of using the layered approach? Answer: As in all cases of modular design as well
Under what circumstances do page faults occur? Describe the actions taken by the operating system when a page fault occurs. A page fault happens when an access to a page that
As we already know, threadsmust ensure consistency; otherwise, race conditions (non-deterministic results) might happen. Now consider the "too much milk problem": two people share
What are the steps followed in testing? i. Unit testing - The individual components are tested in this type of testing. ii. Module testing - Related collection of independen
How the Nested Macro calls are expanded LIFO (Last in First out)
Define which is not a key piece of information, stored in single page table entry, supposing pure paging and virtual memory A reference for the disk block which stores the pa
FCFS (First Come, First Served) Perform operations in order requested No reordering of work queue No starvation every demand is serviced Poor performance
Problem: Managing Outside Communication. a. What is the principal action we use when communicating through a web browser? b. Give an example of how to preaddress an email
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