CS604 Quiz

CS604 – Operating System

Quiz No.1 Dated Dec 04, 2012

The process id returned to the child process after successful fork system call execution is

Shared libraries and kernel modules are stored in _____________ directory. /bin /dev/ /boot

/lib

___________ is a piece of code in a cooperating process in which the process may updates shared data (variable, file, database, etc.). Critical analysis

Critical section

Critical path Critical code

Round Robin algorithm is similar to ____________ scheduling but preemption is added to switch between processes.

Shortest Remaining Time First

First Come First Server

None of these

DOS is single user operating system.

True

False

You can use the mv file1 file2 command to move ______________ File1 to file2. File2 to file 1 This command will not work for moving None the options is correct

A process is said to be in critical section if it executes code that manipulates shared data

True

False When process opens its first file explicitly it will get descriptor number ______

A parent process calling_______ system call will be suspended until children process terminates wait Fork

Exit

Exec

_____ scheduling algorithm is sometimes called shortest remaining time first scheduling algorithm. Non-Preemptive SJF Priority Scheduling

Preemptive Shortest Job First

FCFS

A solution to the critical section problem must satisfy the following requirements Progress Mutual exclusion Bounded Waiting

Race Condition

A major problem with priority scheduling algorithms is ______. Deadlock Aging

All threads within a process share the ________ address space. Same

Different

Is Cs

top

Cd

The problem with priority scheduling algorithms is ___________ Deadlock Aging Nice value

_________ scheduling algorithm can be preemptive or non-preemptive. First Come First Serve

Round Robin Priority

The scheduling of ______ are done by the operating system. Kernel threads User level threads

Both kernel and user level thread

None of the give option

In Unix/ Linux, by default the standard output file is attached to the ___________ File

Screen

Printer Scanner

POSIX is a standard developed by ANSI IEEE

ISO

ACM

_____________ is the basis of queuing theory which is branch of mathematics used to analyze systems involving queues and servers.

Little’s Formula

Deterministic modeling Queuing Theory Queuing Analysis

___________ is a solution to the problem of indefinite blockage of low-priority processes.

Deadlock

Aging

The priority of a process can be changed using ___________ command.

nice

cmd Cat