Monthly Archives: February 2017

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Multiprogramming

Category : Blog

It is the name given to the the interleave execution of two or more different and independent programs by the same computer. We have introduced the nation of having two programs in the main memory at the same time. The O.S for overall system control and the user program for performing user job. In multiprogramming this concept is carried one step further by placing two or more user programs in the main memory, when a user program was executing (using CPU)start performing I/O operations. The CPU is allocated to another user program in the main memory. That is ready to use CPU, instead of allowing the CPU to be idle the CPU switches frome one program to another almost indicated by the OS. Hence, a multiprogramming several user programs share the time of CPU to keep it busy. A multiprogramming there a number of programs available to the CPU and a portion of one is executed, then a segment of another and so on. Two or more programs reside in the main memory , the CPU is capable of executing only one instruction and at a time.





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Routers

Category : Blog

Router have access to network layer addresses and contain software that enable us to determine which of several possible path between those address is the best for a particular transmission.
Routers operate In physical, data link and network layer of the OSI modal.
Router operate in physical, data link and network layer of OSI modal.
Router send packet among multiple inter-connected network.it route packets from one network to any of any of a number of potential destination networks on an internet. A packet send from a station on one network to a station on a neighboring network goes first to the jointly held router, which switches it over to the destination network. If there is no one router connected to both sending and receiving network, the sending router transfer the packet across one of its connected network to the next router in the direction of the ultimate destination, the router forward the packet to next router on the path and so on, until destination is reached.
Router identified the best route for a packet to travel, it passes the packet alone the appropriate network to another router. Router checks the destination address, find best route for the packet and passes it to the destination network.




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How to write a Resume

Category : Blog

Your resume its not autobiography .it’s a short document, meant to show an employer that your are a desirable candidate for an for an available job .writing an effective resume presents you as a well- qualified ,interesting individual who is worthy of a face to face interview.
Employers may receive over 100 resumes for a single job opening, while ideally each candidate would receive equal time, the fact is that employers or their human resource department typically short through a pile and put the most interesting specimens at the top of heap. (Statically) your resume has about ten or twenty either float to the top or sink to the bottom.
Gathering information – whether you ‘re writing a resume for one employer on several the job of writing a resume is much easier when you take the time to put all information in front of you .resume are divided in the section experience, skills and education.
create a resume is an essential part to finding employment. without a resume , the individual seeking employment is unable to apply for or be considered for a position for which they wish to work . a resume is first impression that an employer will often receive of the applicant for this reason , it should be concise and outline the achievements experience and qualifications that make and individual eligible for a certain position.
When a create a resume ,it is essential to research to objective statement , as it often allows the employer to make a judgment of the ability to the potential employee before even reading the rest of resume.


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Definition of Internet

Category : Blog

The internet is a network of thousands of computer networks. Every network and every computer in these networks exchange information according to certain rules called protocols. These different computer and different networks are united with the common thread of two protocols .

Internet has the characteristics : internet has the following characteristics –
1- A Complex Networks.
2- Disorganized.
3- A Decentralized System .
4- Composed of Billions of Files.
5- Widely used.
6- International In Scope.
7- Dynamic.
8- Expanding Exponentially.


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Operating System

Category : Uncategorized

An operating system is a program that acts as interface between the computer user and computer hardware . The purpose of an operating system is to produce or provide an environment in which a user can execute a program . The primary role of an operating system is to make a computer system convenient to use. A secondary role of operating system is to use the computer hardware in an appreciating manner .
An operating system is an important part of almost every computer system, In other words, operating system is the heart of computer system, There are four parts of computer system
1- Hardware
2- Operating System
3- Application Program
4- Computer User
The primary objective of an OS is to make computer system convenient to use .
Function of operating system: –
1 – processor Management
2- CPU Sheduling
3 – Memory Management
4 – Dead Lock
5 – File Management
6 – Input/Output Management
7 – Protection and Security
8 – Command interpreter