co mid 2 questions

1 a    various mechanisms of mapping main memory address in to cache memory
1 b    differences between magnetic drum and magnetic tape
2     block diagram of DMA controller and explain how it is used for direct memory transfer between memory and pheriperal
3 a   write short notes on array processor
3 b   explain flynn's classification of multi processors
4 a   what are the different instruction structures used in multiprocessor
4 b differences between tightly coupled and loosely coupled systems
1 a  explain how virtual address is converted in to real address in a page virtual memory system
1 b  describe in words and by means of block diagram how multiple matched words can be read out from an associative memory
2 a   describe asynchronous data transfer with the help of timing diagram
2 b   why is priority handling described in interrupt controller and how to the difference priority scheme work 3 a    explain input output processor in detail
3 b   explain interrupt arbitration
4  a   how interprocessor communication and synchronization is achieved in multiprocessor explain the role of shared memory in it  
4 b  explain about main memory