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Question:
(a) Modern processors operate in one of two modes: one for the operating system and one for applications. What is the purpose of having these two modes?
What are the usual mechanisms for switching from system mode to application mode, and vice versa?
(b) (i) Compare UMA (Uniform Memory Access) and NUMA (Non Uniform Memory Access) Microprocessor System.
(ii) What is the cache coherency problem in a multiprocessor environment?
(c) Discuss the following multiprocessor scheduling strategies Space Sharing Gang Scheduling.
(d) Three source files normally take 10 seconds, 18 seconds and 30 seconds respectively to compile by themselves on one processor in a processor pool. How long should it take to compile all the files using two processors? Explain what is liable to limit the time attainable for a parallel compilation, especially as the number of compilations increases.
(e) Steaming audio or video services are usually implemented over UDP instead of TCP. Assuming that both impose roughly the same computational burden on the processor, explain why this is the case?
Explain Structure The Grammar for programming language is a formal description of Structure
Explain how protection is provided for the hardware resources by the operating system. Dual mode operation Sharing system resources needs operating system to make sure
Explain the Application Interaction Protocols Application interaction protocols are uniquely defined for each program and are used to logically describe the data being passed b
What is Instruction trace
Logical File System Responsible for providing the before discussed interface to the user including: File access. Directory operations. Security and protection.
Q) a. Given that the first three necessary conditions for a deadlock are in place, comment on the feasibility of the following strategy. All processes are given unique priorities.
What is indexed allocation? Every file has its own block of pointers to the sectors of the file.
what is application software?
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Define secondary memory. This memory holds those pages that are not there in main memory. The secondary memory is usually a high speed disk. It is called as the swap device, an
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