Operating System and Administration (CO2011) - Unit I

It is written in a high-level language, making it easy to read, understand, change, and move to other machines.

It has a simple user interface that has the power to provide the services that users want.

It uses a hierarchical file system that allows easy maintenance and efficient implementation.

<p>A consistent format for files, the byte stream.</p> Signup and view all the answers

<p>It provides a simple, consistent interface to peripheral devices.</p> Signup and view all the answers

<p>It provides primitives that permit complex programs to be built from simpler programs.</p> Signup and view all the answers

<p>It hides the machine architecture from the user.</p> Signup and view all the answers

<p>It was rewritten in C, making it portable and changing the history of OS's.</p> Signup and view all the answers

<p>The Sixth Edition, also known as Version 6.</p> Signup and view all the answers

<p>C, UUCP, and the Bourne shell.</p> Signup and view all the answers

<p>It was the first public release outside Bell Laboratories.</p> Signup and view all the answers

<p>Xenix.</p> Signup and view all the answers

<p>The program resides on disk as an executable file.</p> Signup and view all the answers

<p>A program that is actually running within the purview of Unix.</p> Signup and view all the answers

<p>Unix loads the program from the executable file on disk, builds appropriate data structures, and then starts it running.</p> Signup and view all the answers

<p>A (fairly complex) data structure in which Unix keeps all of the information about the status of the program that is running.</p> Signup and view all the answers

<p>It does the actual call to the Unix system service in question.</p> Signup and view all the answers

<p>printf, exit, and open.</p> Signup and view all the answers

<p>A new complete copy of the program main is created, including all its data and code areas as they exist at that moment.</p> Signup and view all the answers

<p>Zero</p> Signup and view all the answers

<p>It returns from the call to fork() with a nonzero return value.</p> Signup and view all the answers

<p>It causes a Unix service to be accessed which puts the process to sleep by putting its data structure into a wait queue.</p> Signup and view all the answers

<p>Replaces the program and data areas of P50 with a new program (program copy).</p> Signup and view all the answers

<p>To redirect output of a command into a file or to issue another command on the output of one command.</p> Signup and view all the answers

<p>Either the child process or the parent process can run, putting the other on the ready to run queue.</p> Signup and view all the answers

<p>I/O redirection and Pipe(|).</p> Signup and view all the answers

<p>The keyboard, which is the standard input (stdin) device.</p> Signup and view all the answers

<p>It starts by returning from the call to fork() with a return value of zero.</p> Signup and view all the answers

<p>Unix will wake up any process that was waiting for it to finish and put the data structure for that process on the ready to run queue.</p> Signup and view all the answers

<p>To send the standard output of one command to another command as standard input.</p> Signup and view all the answers