NT1330 Unit 1 Essay

1. The program will run itself in user mode because the application would start running at the lowest level which is ring 3. Also, the application would have limited instructions. If the code crashes in user mode, the chances of recovering it is higher unlike the kernel mode will set in higher security risk. It could run on kernel mode if the system call is made and requires additional resources from the Operating System.

2. It will print a virtual address because each memory goes through the memory management unit. It goes first from the CPU to MMU. The written code buffer is the piece of memory from Translation lookaside buffer (TLB) contains pages that would go through the physical address. That statement will print first the virtual address

The OS would have to use a soft link. The soft link would parse the name of the path and be able to process it until it finds the correct one with the links of the file elements. In the process of paring the directory, it reads some inodes and read other directory in order to complete the process. The inode has its own special directory file to be able to parse the directory.

6. Because the function open represents a file that it was opened. When you open a file, the operating system makes several resources that are needed in order to access it. Fd opens the file for read only mode. The Operating System has access to its file systems which can store directories. The directory /home/readme comes from the file directory and the Operating System manages it.

7. When the memory management unit performs the Translation lookaide buffer (TLB). TLB process access the data directed to physical memory. The OS handles page fault by using data into the physical memory. It sets up page tables to map the useless virtual address to the right physical address. The format of the page entries from the TLB won’t be longer visible to the software.

8. The Operating System terminates the access to a file from the file system. It also updates the file metadata and the system wide table for file