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What is the shortest definition of os?

Asked By: ashish garg | Asked On: Aug 30th, 2006

Answered by: lakshmi sampath on: Jul 16th, 2014

Operating system is government of computer.
or
operating system is resourse allocator.

Answered by: Lingapandi on: Jun 4th, 2012

Operating system is a system software.

Belady's anomaly

Asked By: vineelkumar | Asked On: Jan 31st, 2008

What is belady's anomaly and why does it occur ? How would you avoid this ..?

Answered by: lakshmi sampath on: Jul 16th, 2014

In FIFO page replacement algorithm some cases will exists sometimes like "when the no of frames increases the page faults increases".this anamoly arised is known as beladys anamoly.

Answered by: Aditya on: Jul 11th, 2012

Usually, on increasing the number of frames allocated to a process virtual memory, the process execution is faster, because fewer page faults occur. Sometimes, the reverse happens, i.e., the executio...

Before operating systems

Asked By: ramya kandasamy | Asked On: Mar 10th, 2010

Before the introduction of operating systems what concept was used in computer?

Answered by: Anuj on: Jul 9th, 2014

Monitor Programs

Answered by: Lokesh M on: Nov 30th, 2011

Prior to the introduction of Operating System, operation instructions were generally fed into the electronic system bit by bit on rows of mechanical switches or by jumper wires on plug boards.

UNIX find, grep, sed

Asked By: sarun5 | Asked On: Mar 12th, 2008

What is find, grep and sed? Could you please give me the difference between all the three? Where we use this commnands?

Answered by: Mustafa on: Jun 14th, 2014

Find command is used to find a file.
grep command is used to find a contain or string in a file
sed command is used for filter purpose, if want to replace a word, want to print particular line of the file etc

Answered by: cdubet on: Mar 14th, 2008

find : locate a file matching conditionsexfind /src -name "*.c" : list all files contains in /src matching *.cgrep : search a text pattern in (a) file(s)ex grep abcd toto.csed : substitute/replace str...

Difference between a process and a program?

Asked By: pinky_princess88 | Asked On: Nov 21st, 2005

Answered by: vivekanand saini on: May 3rd, 2014

Difference b/w program and process is confusing, but crucial. In general, a process mean a program under execution.

Answered by: Simran Jeet Singh Bagga on: Feb 16th, 2014

A Program or Computer Program essentially provides a sequence instructions (or algorithms if you rather) to the operating system or computer. These computer programs come in an executable form that th...

Semaphores

Asked By: tereraiterence | Asked On: Jan 26th, 2009

Describe how a semaphore is used in operating system?

Answered by: Kishore Rajendra on: Mar 6th, 2014

Semaphore is an non-negative integer, which is used to provide mutual exclusion to processes trying to access a same resource. For example, if you are copying a file, then you cannot move it to some ...

Answered by: user569 on: Feb 7th, 2013

Semaphore is a shared binary variable which can take values either 0 or 1. The primary purpose of them is to ensure mutual exclusion property between or among the two or more processes that want to en...

Is it possible system run without ram? Explain

Asked By: surya karn | Asked On: Aug 25th, 2012

Answered by: Kishore Rajendra on: Mar 6th, 2014

No. You cannot run a system without RAM. Because to start a computer, its Operating System has to be loaded into RAM(Random Access Memory).

The processor reads what to do next (instructions) from RAM. So without RAM, you cannot start a computer, and you cannot tell it what to do.

Answered by: rahul on: Sep 14th, 2013

No, it is not possible to run the system without RAM,because, ram is random access memory,it is used for the temporary holding the process data.

Difference between computer architecture and computer organization?

Asked By: ashish kumar gupta | Asked On: Nov 1st, 2006

Answered by: komal on: Feb 18th, 2014

computer organization is concerned with the way the hardware components operate and the way they are connected together to form computer system while comp architecture is concerned with the structure ...

Answered by: ali on: Apr 6th, 2013

THE distinction b/w computer organization and computer architecture

Install os over network

Asked By: suganthansss | Asked On: Jul 26th, 2010

How to install os from server to all system?

Answered by: Saleem on: Dec 11th, 2013

There are several ways we could install OS over the network, most dominated one is WDS and better than this is SSCM

Difference between ntfs and fat32?

Asked By: ravi_poo2002 | Asked On: Mar 24th, 2006

Star Read Best Answer

Editorial / Best Answer

Answered by: Aparna Patil

Answered On : Mar 24th, 2006

NTFS

1)allows access local to w2k,w2k3,XP,win NT4 with SP4 & later may get access for somefile.

2)Maximum size of partition is 2 Terabytes & more.

3)Maximum File size is upto 16TB.

4)File & folder Encryption is possible only in NTFS.

FAT 32

1)Fat 32 Allows access to win 95,98,win millenium,win2k,xp on local partition.

2)Maximum size of partition is upto 2 TB.

3)Maximum File size is upto 4 GB.

4)File & folder Encryption is not possible.

Answered by: Vitish on: Nov 7th, 2013

New technology file system

Answered by: rahul on: Sep 14th, 2013

Fat-file allocation table,not secure mostly used in win 98 and flash drive.
NTFS:-new technology file system,secure,more feature than fat,like encryption,decryption

What is the main difference between gpos and rtos?

Asked By: satyagmk | Asked On: Nov 14th, 2007

Answered by: dikshith on: Oct 21st, 2013

GPOS

1.It is used in multiuser environment
2.protected memory model
3.non scalable
4.high interrupt latency
5.time insensitive

RTOS

1.it is dedicated to a single work
2.flat memory model
3.scalable
4.low interrupt latency
5.time sensitive

Answered by: mohammadali on: Aug 7th, 2011

The main difference between GPOS and RTOS is that the RTOS should be deterministic. That is, the time consumed by the operating system to execute it's service is fixed where as in GPOS it's variable...

Need of operating system

Asked By: pavuluri | Asked On: Mar 5th, 2008

What is the need of operating system in computer science?

Answered by: VENKATA REDDY on: Oct 2nd, 2013

OS acts as an interface between an user and machine .
In other way OS is an intermediary between any program and computer hardware.

Answered by: kamaldeev on: Oct 4th, 2011

Need of Operating System: In earlier day’s user had to design the application according to the internal structure of the hardware. Operating System was needed to enable the user to design the applic...

I/o burst and cpu burst

Asked By: bhaskar tripathi | Asked On: Sep 18th, 2009

What is pre-emptive short job?What is the i/o burst?What is cpu burst?

Answered by: Syed Muhammad Muzammil on: Sep 25th, 2013

CPU Burst :- "The amount of time the process uses the processor before it is no longer ready". Types Of CPU burst :- 1. Long burst : ("Process is CPU bound") 2. Short burst : ("Process I/O bound") I/...

Answered by: saadat ULLAH on: Oct 11th, 2012

CPU BURST:cpu burst is that when cpu wait for input process and after completion input burst cpu do process on that job... cpu burst is like a car and input output burst is like a pedestrian..bec cpu ...

What is cache memory? Can we increase cache memory size as large as a hard disk(40gb)? What are the adv and disadv? What is diff betn swap(solaris) and cache?

Asked By: palakollu | Asked On: Jun 15th, 2006

Answered by: Sara on: Aug 17th, 2013

Cache memory is the fastest memory (after registers),which is situated between RAM and CPU. Data required by the user will stored in cache so whenever data is required CPU first check this memory and ...

Answered by: dilip agrawal on: Oct 24th, 2007

cache memory is also a  mamory which can directly communicate with the processor.it is used for there is no mismatch between processor and memory so we use cache memory.but metter is that it size...

Define associative memory. Discuss its limitations and suggest a remedy.

Asked By: sarkarzinnia | Asked On: Aug 28th, 2007

Answered by: aravind kumar on: Jul 6th, 2013

Example:neural network which classify the data based on its content

Answered by: Sandhya.Kishan on: Jul 11th, 2012

Associative memory is the type of memory that allows the recall of the data based on the degrees of similarity between the input pattern and the pattern stored in the memory.It is a memory organization where memory is accessed by content and not through address.

Logical & physical address

Asked By: mayur1 | Asked On: Feb 20th, 2010

How does operating system work with logical & physical address?

Answered by: mohitdns on: Mar 20th, 2013

As per My understanding, Physical address is the main unique address & logical address is that understood by Computer.
We can take the example of LAN/NIC Card, which having MAC address that is physical address & IP address would be Logical address.

Answered by: cptrjoy on: Jan 16th, 2013

Address that generates by CPU is called logical address and the address of the main memory called physical address

Tool to document business requirements?

Asked By: yadleen | Asked On: Dec 31st, 2012

Typical user defined signal handler functions perform actions such as

Asked By: xyz10 | Asked On: Oct 1st, 2012

A) abort process immediately without further ADO b) perform minor house keeping prior to resumption c) roll back process state to last checkpoint d) tidy up to process abortion a) 1&2 b) 2 & 4 c) 3 d) 4

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