What Are The Basic Functions Of Operating System ?

BASIC FUNCTIONS OF OPERATING SYSTEM

Different types of operating system are used for different purpose.Their size and complexity vary from operating system to operating system. The following are the various function of an operating system , they are

1. Managing Resource.
2. Providing User Interface.
3. Running Application.
4. Support For Utility Program.
5. Controls Computer Hardware.

1. Managing Resource : The operating system manage the resource to execute the task within the computer system depending upon their arrival in the ready Que.

2. Providing User Interface : The operating system provides the user interface to the user to interact with the computer system. The interfaces are -

• Command User Interface ( CUI ).
• Graphical User Interface ( GUI ).

Ready Que means the no. of process arrival to perform their task with in the central processing unit.

3. Running Application : The operating system provides the input / output resource to execute the task with in our computer system. The process execute program that has to be loaded in the Random Access Memory (RAM) from the hard disk.

For Example - When we write a letter 1st we have to load and run the MS Word, when we request to run a program the operating system locates the program or application in the hard disk and load the program to the Random Access Memory or Primary Memory.

4. Support For Utility Program : When a system raises a error or the system is corrupted or the system is virus effected or insufficient memory at that time the utility program solve our problem by using the following base -

• Formatting.
• Back Up Recovery.
• Disk Defragmenter.
• Installation.
• Uninstallation.

5. Controls Computer Hardware : The operating system supervises all the hardware devices connected with the computer system. It gives us an idea about the status of our hardware devices that they are properly connected or not. The operating system also provides one of the technique which is known as BIOS (Basic Input Output System). Through BIOS we can maintain the system information like the system password, capacity of ram, etc.

Defination And Notes On : What Is Computer ? & What Are The Characteristics Of Computer ?

1. WHAT IS A COMPUTER? & WHAT ARE CHARACTERISTICS OF COMPUTER ? 


WHAT IS A COMPUTER : Computer is an electronic device. It can do arithmetic calculations faster. But as you will see later it does much more than that. It can be compared to a magic box, which serves different purpose to different people. For a common man computer is simply a calculator, which works automatic and quite fast. For a person who knows much about it, computer is a machine capable of solving problems and manipulating data. It accepts data, processes the data by doing some mathematical and logical operations and gives us the desired output.

Therefore, we may define computer as a device that transforms data. Data can be anything like marks obtained by you in various subjects. It can also be name, age, sex, weight, height, etc. of all the students in your class or income, savings, investments, etc., of a country. Computer can be defined in terms of its functions.

• It can accept the data,
• It can store the data,
• It can process the data as required by the user, 
• It can retrieve the stored data as and when required by the user,
• It can print the result in desired format. 

CHARACTERISTICS OF COMPUTER :

• Speed: Speed of the computer is wonderful. They can produce results instantaneously. A computer can do 10 lacs calculations in one second. The characteristic of speed is highly useful in various areas like space research, weather forecast, airplanes etc.

• Accuracy: Computers are highly accurate machines. They produce error free results. Any errors shown, is the result of wrong input entered in the computer. Errors are generally mammal. It has to do all those functions which it is instructed to do so.

• Storage: Computer can store enormous amount of data in it. The information can be retrieved from the storage devices almost instantaneously. Hard Disk (Magnetic Disk) is used to store the data. Think of storing a data on an 80 Giga byte on hard-disk. It can store nearly about - 10, 00, 000, 00 pages of data on it.

• Versatile: Computer is a versatile machine. It can perform the job instructed to it without any taking any break for a continued duration. Due to this characteristic, computers are working round the clock in various departments like Railway, Banks, Hospitals, Industries, etc.

• Diligence: Computer can work for a long time and does not suffer from the tiredness. It can perform the job several hours with same speed and accuracy.

• No Feeling: It does not have any feelings, emotion, taste, knowledge and experience. Thus it does not get tired even after long hours of work. It does not distinguish between users. 

• No IQ: Computer is a dumb machine and it cannot do any work without instruction from the user. It performs the instructions at tremendous speed and with accuracy. It is you to decide what you want to do and in what sequence. So a computer cannot take its own decision as you can.
  
  

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