1-Design a direct mapping and 4 way set associative mapping structure with 128KB cache and 128 MB memory size. Write the address limits of main memory, line numbers of cache, set numbers and number of bits. Explain the structure and write the advantages, drawback of the method.

2-Using the following reference string apply Optimal Page, Least Recently Used and FIFO algorithms to the sequence for a memory with 4 frames. Write the number of page faults for each. 1, 4, 8, 5, 2, 7, 0, 4, 3, 4, 1, 8, 2, 5, 6, 9, 5, 4, 0, 7, 3, 4, 8, 1

3-Explain RAID and types of RAID

computer architecture