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- Operating systemIn a computer architecture with a memory cell size of 2 bytes, what is the total number of cells to be allocated in memory for a long array of 80 elements.Cache is small relative to main memory. Because cache is small relative to main memory, only blocks of memory are brought into cache and then replaced when necessary. The text discusses different ways by which blocks can be assigned and located in cache. What are the different ways called? How are they the same?
- In Paged Memory allocation, which term refers to the equal-sized partitions into which memory is divided? Page Page Map Table Page Frame DisplacementThe effective access time in a virtual memory system depends on the TLB hit rate but does not depend on whether the page table contains a valid translation for the page. O True O FalseDescribe the concept of memory segmentation in computer architecture and how it affects memory access.
- A cache system is to be designed to store data from a 256 MB memory space. If each block of main memory contains 16 words, determine the number of blocks that are needed and draw the logical organization of the full address identifying the block ID portion and the word (offset) portionCache memory acts betweenMapping the main memory bit address to the cache address is called address mapping. What are the common cache mapping methods?
- Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. How many bits are used for the page number? How many bits are used for the offset? With this system, what’s the maximum number of pages that a process can have? Suppose that each entry in the page table comprises 4 bytes (including the frame number, the valid bit, and miscellaneous “bookkeeping bits”). An OS uses an array to store the page table. What is the size of the page table? Furthermore, suppose the first 6 pages of a process map to frames 222 to 227 (as decimal numbers), and the last 5 pages of the process map to frames 1 to 5 (also decimal numbers). All other pages are invalid. Draw the page table, including the valid bit and the frame number.A memory system has 4 KB byte-addressable main memory and a direct-mapped cache that consists of 8 blocks with 16 bytes per block. The following shows the main memory address format that allows us to map addresses from main memory to cache. Note: 12 bit address, 4 bit offset, 3 bit $block, and 5 bit tag Assume the cache directory shown below:8