Overview of Computer System

Hardware, Software, Firmware 

                             

 Hardware is the physical tangible components of a computer system.

                             

Software is the computer programs that govern the operation of computer.

                           

Firmwares are the prewritten programs permanently stored in read-only memory .These configure the computer and are not easily modified by the user.

Difference between compiler and interpreter

                         

A compiler converts the source code (HLL) into object code (machine language code) in one go and reports all the error with their line number.

                         

An interpreter converts source code into object code line by line and executes it there and then. It does not shift to the next line if the line is erroneous.

Binary Language as Machine Language

                            

A computer operates on electricity i.e. it understands electronic signals that are just two –ON and –OFF.    

Functional Components of computer and their interconnection

                          

A computer system contains many different objects such as a CPU, memory, disks etc.

These must be connected for the system to function.

The wires used to connect the components are called buses.

Basic Structure Of a Computer

             

Computer Operations

                     

A computer performs basically five major operations or functions irrespective of their size and make. 

These are-

1.     It accepts data or instructions by way of input

2.   It stores data

3.   It can process data as required by the user.

4.   It gives results in the form of output.

5.    It controls all operations inside a computer.

                                            

Concept of Booting

Booting is a process or set of operations that loads and hence starts the operating system, starting from the point when user switches on the power button.

There are two type of booting –

1.      Cold Booting- When the computer is started after having being switched off.

2.    Warm Booting-When the operating system alone is restarted (without being switched off) after a system crash or freeze.

Classification of Computers

                       

Classification of Computers

This post is about computer overview I hope this will helpful for you ,In the next post we will talk about working of operating system.