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Q1) Consider a dynamic RAM that must be given a refresh cycle 64 times per ms. Each refresh operation requires 150 ns; a memory cycle requires 250 ns. What percentage of the memory's total operating time must be given to refreshes?
Discuss an application that would benefit from the use of barrier synchronization
Computer has 16 pages of virtual address space but only three physical pages frames. Initially physical memory is empty. Program references virtual pages in order 1,2,3,4,5,3,4,1,6,7,8,7,8,9,7,8,9,5,4,5,4,2 Which references a page fault with LRU ..
Give three technical merits of UNIX b) Differentiate between "clustered systems" and "real-time systems". c) Describe the purpose of using "trust relationship"
Analyse the different methods for collecting data Explain by taking examples 3 types of Sampling techniques.
Assume that 80 percent of the accesses are in the associative memory and that, of the remaining, 10 percent (or 2 percent of the total) cause page faults.What is the effective memory access time?
Explain the following terms in relation to linear programming problems- (1) decision variables (2) objective function
Construct a resource allocation graph with the following processers and resources, the system consists of four processers P1, P2, P3, and P4 and five resources R1, R2, R3, R4, and R5.
Deadlock Avoidance and Scheduling
Write two challenges an OS faces when passing parameters between user and kernel mode. Describe how an OS can overcome them
Define Critical Path and CPM. Define Networks & Network scheduling
Develop a user mode command interpreter which support list-short.
CPU with interrupt-driven I/O is busy servicing disk request. While CPU is midway through the disk-service routine, another I/O interrupt occurs. What occurs next?
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