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What is a page table base register?
Each process running on a processor needs its own logical address space. This can only be realized if each process has its own page table. To support this, a processor that supports virtual memory must have a page table base register that is accessible by the operating system. For operating system security, this register is only accessible when the processor is in system mode. The operating system maintains information about each process in a process control block. The page table base address for the process is stored there. The operating system loads this address into the PTBR whenever a process is dispatched.
What information is contained in a process table within an operating system?
Different data is contained in the process table:Priority of the processProcess is ready or waitingThe user ID of the user running the process
What is a page map table?
In operating systems that use virtual memory, every process is given the impression that it is working with large, contiguous sections of memory. In reality, each process' memory may be dispersed across different areas of physical memory, or may have been paged out to a backup storage (typically the hard disk). When a process requests access to its memory, it is the responsibility of the operating system to map the virtual address provided by the process to the physical address where that memory is stored. The page table is where the operating system stores its mappings of virtual addresses to physical addresses.
How do you print an HTML table using PHP?
It is really simple to print an HTML table in PHP, all you have to do is the following: <?php print "<table>"; print "<tr>"; print "<td>hello</td>"; print "</tr>"; print "</table>"; ?>
What is space table in oracle?
Oracle table space is an identifier for a physical file found at the operating system level.
Print a table of 2 in vb?
print table of 2 in vb
What is the similarities and differences between the windows routing table and the router routing table?
That depends entirely on what Operating System the router is running
What trends are there in modern table cloths?
The trends in modern table cloths are chevron print, arrow print, hand printed table runner, diamond print, fold or unfold table cloths and many more.
What are four resources required for process execution?
various CPU registers where process need to be stored for execution for running state.process priority and other scheduling information which is required to schedule the information of page table.memory limitssegment table depending on the memory used by the operating system
What is device status table in operating system?
The device status table in an operating system is a data structure that maintains information about the various I/O devices connected to the system. It typically includes details such as the device's state (e.g., idle, busy, or error), its type, and any specific attributes or configurations. This table helps the OS manage device operations efficiently by tracking which devices are available for use and coordinating access to prevent conflicts between processes. Ultimately, it plays a crucial role in the overall device management and resource allocation within the operating system.
What is the significance of a valid bit in a page table and how does it impact the overall functionality of the page table system?
The valid bit in a page table indicates whether a page is currently in use or not. It impacts the functionality of the page table system by helping the operating system efficiently manage memory. When a valid bit is set, it means the page is in use and can be accessed by the CPU. If the valid bit is not set, it indicates that the page is not currently in memory and the operating system needs to retrieve it from secondary storage. This helps prevent unnecessary memory accesses and improves system performance.
Describe three general methods for passing parameters to the operating system?
1) Pass parameters using registers(directly). 2) Store the parameters in a table in memory and the table address is passed in a register to the OS. 3) Push(store) the parameters onto a stack(by the program) and "pop" off by the Operating System.
