in CPU Scheduling, 'aging' is

• keeping track of how many times a given page is referenced

• increasing the priority of jobs to ensure termination in a finite time

• keeping track of cache contents

• keeping track of what pages are currently residing in memory

In Linux environment, at start of process execution, STDOUT & STDERR

• Point to special files on the system

• Point to current terminal device

• Are closed

The only state transition that is initiated by the user process itself is :

• dispatch

• wakeup

• block

The technique, for sharing the time of a computer among several jobs. Which switches jobs so rapidly such that each job appears to have the computer to itself:

• time out

• time domain

• time sharing

• FIFO

The address of the next instruction to be executed by the current process is provided by the

• Program counter

• CPU registers

• Process stack

• Pipe

Part of a program where the shared memory is accessed and which should be executed invisibly, is calledcritical section

An incremental backup

• should be done each month

• uses more tapes

• saves only files that have recently changed

• saves all files

A partitioned data set is most used for

• storing program data

• storing ISAM files

• storing backup information

• a program or source library

How can you add Amit, a new user, to your system?

• Using useradd

• Using adduser

• All of the choices

• Using linuxconf

In priority scheduling algorithm, when a process arrives at the ready queue, its priority is compared with the priority of

• parent process

• currently running process

• init process

• all process