[**Virtual University Of Pakistan**Student Cafe] .::VULMSIT::.eNoxel.com CS604 Quiz No.1 Dec 04, 2012

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

0

1

2

3

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 job first

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 ______

1

2

3

4

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

Starvation

None of the these

All threads within a process share the ________ address space.

Same

Different

__________ displays information about the top processes.

Is

Cs

top

Cd

The problem with priority scheduling algorithms is ___________

Deadlock

Starvation

Aging

Nice value

_________ scheduling algorithm can be preemptive or non-preemptive.

First Come First Serve

Shortest job First

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.

Starvation

Deadlock

Aging

None of the these

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

nice

cmd

Cat

grep

Batch programs are usually _________ programs.

Interactive

Non-interactive

Foreground

Preemptive

A process consists of __________

One or more threads

Code

Data

All of the given

_________ is the smallest rectangle enclosing the portion of a window or client area affected by recent drawing operations

Invalid Rectangle

Accumulated Bounding Rectangle

Accumulated Client Rect

All of the given options

What kind of messages can be display using messagebox function?

Long messages

Short messages

Null value

None othe given

_______ acts as a buffer between applications and output devices.

GDI

Kernal32

OS

CPU

On which machines the scheduler can move individual threads to different processors to "balance" the CPU load.

Miniprocessor

Multiprocessor

Doubleprocessor

None of given options

The window ______ is the color or pattern used to fill the client area before a window begins drawing

Caption

Color palette

Background

Foreground

___________ is used to check the predefined identifiers.

#include

#ifdef

#def

#elif

_________ is/are Pre-defined GDI object(s) in Windows.

Pens

Brushes

Fonts

All of the given options

If a window owns child Windows, and we destroy owner Window then _____________.

Only owner window will be destroyed

Only its owned window will be destroyed

Both owner and owned Windows will be destroyed

The application will be crashed

command displays the contents of current working directory.

Is

Cs

Mv

______________ is used to request the OS by the process to take an I/O or initiating child process.

System Call

Interrupt

Trap

Singal

Linux uses ___________ directory to store system configuration files.

/bin

/dev

/boot

/etc

__________ commands in Linux is used to copy file

is

cp

mv

mkdir

User mode can run the Privileged instructions.

1

0

A parent process calling __________ system call will be suspended until children process terminates. ht

wait

fork

exit

exec

If your processor does not have two slots empty in Per Process File Descriptor Table, then your _________ system call will fail.

pipe

read

write

open

The manual pages can be read in Linux using ____ command.

man

wan

desc

help

__________ directory includes essential system boot files including the kernel image.

/bin

/dev

/boot

/etc

Swapper is also termed as Short term scheduler.

1

0

First _______ entries in Per Process File Descriptor Table are used as soon as the process is created.

1

2

3

4

The number of processes completed per unit time is called ___________.

Turn around time

Throughput

Response time

Dispatch latency

Command-line interpreter is also called __________ in some operating systems.

kernal wrong

shell

signal

api

__________ displays information about the top processes.

is

cs

top

cd

/usr/X11R6 is used by the X Window System.

True

False

/opt is used for storage of large applications.

True

False

____ is a virtual directory in Linux and Unix.

/proc

/temp

/ver

/boot

The Home Directory for superuser in Linux and Unix is

/

/home

/root

None of the given

Linux Treats Devices as Files.

True

False

~/vusr/CS604 is an example of _________ pathname.

Absolute

Relative

usr/include/sys/vusr.h is an example of _______ path

Absolute

Relative

An absolute pathname starts with the root directory (/) and a relative pathname starts with your home directory.

True

False

A pathname is the list of directories separated by _________.

#

$

&

/

________ determines What will be done.

Mechanism

Policy

Mechanism and Policy

None of the given

_____________ determines How to do something.

Mechanism

Policy

Mechanism and Policy:

None of the given

User Goal of OS is that It easy to use, reliable, safe and fast.

True

False

We can install and run multiple OS by using VMWare.

True

False

Mach, MacOS X Server, QNX, OS/2 and Windows NT are examples of OS Based on ______.

Layered

Micro Kernal

Virtual Machine

None of The Given

In Layered Approach of OS, the Layer highest Layer is User Interface layer.

True

False

In Layered approach of OS, Lowest Layer is known as ________.

Software Layer

Hardware Layer

Lower Level Layer

None of The Given

Operating System is the Manager of Hardware Resources.

True

False

An operating system is a control program that manages the execution of user programs to prevent errors and improper use of a computer.

True

False

The bottom-up view is that operating system is a resource manager who manages the hardware and software resources in the computer system.

True

False

In Top-down OS, user simply give a Command and reset is done by the OS.

True

False

copy file1 file2 is an example of ______ OS view.

Top down

Bottum Up

The Top-down view is that it is a program that acts as an intermediary between a user of a computer and the computer hardware, and makes the computer system convenient to use.

True

False

Managing Secondary Storage Involves all of the Following except

Allocating storage space

Deallocating Storage

Prevent Overwritting

Insure integrity of shared data

Operating System provides services such as Managing Primary and Secondary Storage, Processes and Allowing user to manage his/her files and directories.

True

False

The Purpose of Operating System is to generate Executable Programs and to _______ them.

Regenetrate

Execute

Store

Remove

Users are the People, machines or computers that uses the Hardware resources.

True

False

Database, Complier, Video games are examples of ________.

Hardware

Application

Operating System

Users

Application Programs are methods that enable the use of Hardware resources to solve the user's Problem.

True

False

Which of the Following is not an Operating System.

Linux

Unix

Windows Xp

Datebase

Operating system enables the user to use the Hardware Resources.

True

False

Which of the following is NOT a Hardware Resource.

CPU

OS

I/O Devices

Memory

Hardware provide basic computing resource.

True

False

__________ scheduler selects the process from the job pool and put them in main memory.

Select correct option:

Long term

Short term

Medium term

Swapper

_____________ is a preemptive scheduling algorithm.

Select correct option:

First Come First Serve

Shortest Job First

Round Robin

None of these

The priorities of processes in the __________ group remain fixed.

Select correct option:

Kernel

User

Taking the CPU from one process and giving the CPU to another process is termed as

Select correct option:

Context Switching

Dispatching

Swapping

Tracking

A solution to the critical section problem must satisfy the following requirements except

Select correct option:

 Progress

Mutual Exclusion

Bounded Waiting

Race Condition

___________ is used in real time operating systems.

Select correct option:

 Non-preemptive scheduling

 Preemptive scheduling

 Dispatching scheduling

 FCFS scheduling

The process of switching from one process to another is called latency.

Select correct option:

True

False

The major advantage of multi-programming system is

Select correct option:

More than one jobs can be processed at a given time

CPU utilization can be increases

Jobs can be completed quickly

All of the options are correct

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

Select correct option:

Mouse

Keyboard

Light pen

Joystick

The nice value helps in assigning ______ to a process.

Select correct option:

Priority

Weight

Time

Scheduling

The problem with priority scheduling algorithm is ________.

Select correct option:

Deadlock

Starvation

Aging

Nice value

OS helps manages the following except

Select correct option:

Application software

Memory

Virtual memory

Bus speed of the system

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

Select correct option:

Critical Analysis

Critical Section

Critical path

Critical code

_____________ is a preemptive scheduling algorithm.

Select correct option:

First Come First Serve

Shortest Job First

Round Robin

None of these

The procedure "The time at which the process finished working MINUS the arrival time of the process MINUS CPU burst for that process" will help calculate the _________.

Select correct option:

 on-preemptive Shortest Job First scheduling.

 Preemptive Shortest Job First scheduling.

 FCFS

 RR Scheduling

The Operating system is a layer of software between _________ and ___________.

Select correct option:

Hardware, software application

Kernel, hardware

Dos, Windows

Windows, Kernel

_______________ scheduling algorithm can be preemptive or non-preemptive.

Select correct option:

First Come First Serve

Shortest Job First

Round Robin

Priority

First _______ entries in Per Process File Descriptor Table are used as soon as the process is created.

1

2

4

3

Batch programs are usually __________ programs.

Interactive

Non- Interactive

Foreground

Preemptive

__________ integer shows the highest priority of a process in CPU scheduling

Small

Large