Suppose that the offset field of a byte-addressed 32-bit paged logical address is 12 bits. Then, a process can consist of up to pages. Select one: O a. 2 O b. 212 O c. 28 O d. 216 O e. 232 O f. 220
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- 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. 8 bits are used for offset, 8 bits are used for page # and the max number of pages a process can have is 256. e. Translate the following virtual addresses to physical addresses, and show how you obtain the answers. (Hint: You do not need to convert hexadecimal numbers to decimal ones.) 0x0389 0xDF78 0x0245 0x8012 f) Now, suppose that the OS uses a two-level page table. Draw the page table. (Assume that frames 7 through 221 are free, so you can allocate space for the page table there.) In addition, suppose that the page-table directory storage comprises a whole number of consecutive full frames. (For examples: if the directory entry is 2 bytes, the entry’s storage comprises 1 frame; if the directory entry is 260 bytes, the entry’s storage comprises 2 consecutive frames.) g)What is the size of the two-level page table…Consider a computer which uses virtual addressing with 32 bit addresses and a two level page table. The virtual addresses are split into a 9 bit top level page table field, an 11 bit second level page table field and an offset. How large are the pages and, how many are there in the address space?a) In the SRAM region, what is the corresponding bit-band alias address for the bit [4] of the memory address of 0 * 2000008 b) In the Peripheral region, if the value in the alias address 0 * 4200 0088 to 0 * 4200 008B was set to 0x00000001, what is the bit # and the address in the peripheral region that wants to set to 1?
- Suppose a process page table contains the entries shown below. Using the format shown inFigure 6.15a, indicate where the process pages are located in memory. Frame Valid bit 1 1 - 0 0 1 3 1 - 0 - 0 2 1 - 0Suppose a computer system uses 16 but addresses for both virtual and physical address. In addition, assume each page (and frame) has a size of 256 bytes. -How many bits are used for page number? -How many bits for offset? -what is the max number of pages a process can have?Assume a 32-bit address system that uses a paged virtual memory, with a page size of 2 KB, and a PTE (Page Table Entry) size of 1 B. Answer the following questions, assuming a virtual address 0x00030f40 a. What is the virtual page number (VPN) and the offset in binary for the given virtual address? b. How many virtual pages are there in the system?
- Suppose, a primary memory size is 56 bytes and frame size is 4 bytes. For a process with 20 logical addresses. Here is the page table which maps pages to frame number. 0 - 5 1 - 2 2 - 13 3 - 10 4 - 9 Then find the corresponding physical address of 12, 0, 9, 19, and 7 logical address.Mapping from high level addresses to low level addresses is known as address resolution. True or False?Consider a logical address with a page size of 16 KB. How many bits must be used to represent the page offset in the logical address? A) 10 B) 12 C) 16 D) 14
- Suppose that a machine has 38-bit virtual addresses and 32-bit physical addresses.(a) What is the main advantage of a multilevel page table over a single-level one?(b) With a two-level page table, 16-KB pages, and 4-byte entries, how many bits should be allocated for the top-level page table field and how many for the next-level page table field? Explain.Suppose a two layer memory hierarchy has a 4 clock pulse hit time, a 35 clock pulse miss penalty, and the miss ratio is 20%. What is the AMAT (in number of clock pulses)?Assume a process containing 5 pages with 1024 bytes per page and physical memory with 10 page frames. Frames and pages are of the same size. Given the following page map table (PMT): a) determine the physical address associated with the logical address of page 1, offset 100? b) what is the logical address associated with the physical address 2300? Please dont over complicate this question!!