Question 1. How many address fields are there in Wilkes Control Unit? Explain them.

Question 2. Compare and contrast unencoded and highly encoded micro-instructions.

Question 3. Explain the difference between hardwired control and micro programmed control. Is it possible to have a hardwired control associated with a control memory?

Question 4. Explain the concept of virtual memory in detail.

Question 5. Consider a 4-way set associative mapped cache with block size 4 KB. The size of main memory is 16 GB and there are 10 bits in the tag. Find-
1. Size of cache memory
2. Tag directory size

Question 6. Define semiconductor RAM memories. Show the read operation and write operation in static memories with example.

Question 7. Explain various types of ROM.

Question 8. Point out the need of cache memory. Explain the three following methods with example.
a) Direct
b) Associative
c) Set associative

Question 9. Consider a system which has logical address of 7 bits and physical address of 6 bits with page size of 8 words per byte. Calculate number of pages and number of frames.

Question 10. An 8 KB direct-mapped write back cache is organized as multiple blocks, each of size 32 bytes. The processor generates 32 bit addresses. The cache controller maintains the tag information for each cache block comprising of the following-
• 1 valid bit
• 1 modified bit
• As many bits as the minimum needed to identify the memory block mapped in the cache
What is the total size of memory needed at the cache controller to store meta data (tags) for the cache?