Best Technologies

What is www?

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What is www ? 
                     WWW stands for world wide web .It is also called web .It was launched in 1989  at the European laboratory .It provides the information on the internet .It is a collection of document   or web pages . 
A web is a document that is written in HTML . These web pages are connected to one another  using hyperlink .  
 
 
 
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WHAT is a web server ? 
                                                      Web server is a computer that is used to store information for the user on the internet .A web server is much  faster and powerful than ordinary computer.It may be located any where in the world  . 
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What is URL ? 
                       URL stands for uniform Resource Locator .The URL is the web address for any given web document . Every web has a unique URL . 
Example  
      http://www.google.com.html 
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What is www?

What is www ? WWW stands for world wide web .It is also called web .It was launched in 1989 at the European labor...

How many types of computer language ?

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 Computer language ? 
              A computer language is used to write computer programs .It is a means  of communication between user and computer . A large number of programming language are available for writing programs . 
 Types of programming language . 
 Two types of language . 
 1.. High level language     2.. Low level language 
 
 1.    High level Language  
                         A type of language that is close to human  language is called high level language  .It is easy to understand  
Example of high level language . 
   BASIC                          COBOL                                JAVA     FORTRAN                  C/C++ 
 2.    Low level language   
                                 Low level language are near to computer hardware  and far from human . There are also two types of low level language . 
1.    Machine language  
2.    Assembly language

How many types of computer language ?

Computer language ? A computer language is used to write computer programs .It is a means of communicat...

What is cpu register ?

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What is cpu register ? 
                                                                 Register is a small high speed memory inside cpu .It is used to store data and instruction  temporary.Data is stored in register from main memory for execution .cpu contains a number of register .Each register has a predefined   function .A register can be 1,2,4, or 8 bytes . 
special purpose register . 
  There are many purpose of register 
 
1  program  counter       (PC) 
                   Program counter is used to store the address of the next instruction to be fetched for execution . 
2  instruction register     (IR) 
                                        Instruction register is used  to store the fetched instruction . 
3 Memory address register (MAR) 
                                         Memory address register is used to store memory address being used by cpu . 
4 Memory buffer register   (MBR) 
                                    Memory buffer register is used to store the data coming from the memory or going to the memory.  
5 Stack pointer register

What is cpu register ?

What is cpu register ? Register is a small high spe...

What is cache memory ?

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What is cache memory ? 
 
          A cache memory is a small and very fast memory .It is designed to speed up the transfer of data and instruction .It is faster than RAM.The data and instruction that are most recently used  by cpu are stored in cache memory . 
             The data and instruction are retrieved from RAM when cpu uses them for first time .A copy of that data is stored in cache .The next time the cpu needs that data or instruction ,it looks first in cache .If the required data is found there ,it is retrieved from cache memory instead of main memory .It speed up the working of cpu.   
 The cache memory is used every computer to speed up the working of cpu. It brings data for cpu to search any part of the     cpu.

What is cache memory ?

What is cache memory ? A cache memory is a small and very fast memory .It is designed to speed up the transf...

What is LAN ?

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what is LAN ?</div>
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LAN stand for local area network. It is the most common type of network.it covers a small area .It usually connects the computers and other devices within one office or a building or a group of building.</div>
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Lan is often used to share resource such as printer ,hard disks and programs.                                                                                            lan can transmit data at a very high speed . Data transmission  speeds .                                                                                               data transmittion speed of lan are typically from 10  mbps to 1000 mbps .it is  much faster than data transmission over a  telephone line.                                                                                                     </div>
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uses of lan.</div>
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1.         one copy of software can be shared by all users in a lan.</div>
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2 . system resources like printers and hard disks can be shared          between  users in a lan.                                                                       It is easy to manage the data hard stored on acentralized compute                   in la</div>
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3  .Data  can be shared by all users using lan  .                </div>
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What is LAN ?

what is LAN ? LAN stand for local area network. It is the most common type of network.it covers a small area .It usually connects the...

What is ROM ?

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What is ROM ? 
 
                                             ROM stands for read only memory . 
The instruction in rom prepare the computer  for use .These instruction can only be read but cannot be changed or 
 deleted .It is not possible to write new information into the rom . 
 
             ROM stores data and instruction permanently .When  
the power off , the instruction stored in rom are not lost . 
 
Types of ROM  
  There are three types of Rom . 
1  .>  PROM  
2  .>  EPROM    
3  .> EEPROM 
         1.   PROM  
                          PROM stands for programmable read only memory .          This form of rom is initially blanks . The user can write data  
        and programs on it using special devices . 
       2. 
               EPROM 
                                 EPROM   stands for Erasable programmable read only memory . This rom is initially blank .The user can write data using special devices . 
       3. 
               EEPROM 
                                 EEPROM stands for Electronically Erasable read only memory .In this memory  user can erase and write instruction with the help of electric pulses.

What is ROM ?

What is ROM ? ROM stands for read only memory . The instruction in rom...

What is ram ?

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What is Ram ? 
                                               Ram  stands for random access memory  
It is also called direct access memory .Ram is used to store data 
 and  instruction temporarily . 
 Ram is a volatile memory. It means that its contents are  when when the power is turned off . Ram is a read write memory .Cpu 
 can read  data from ram and write data from ram . 
 
   Types of RAM . 
There are two types of RAM . 
              
1 .> 
     DRAM  
2.>SRAM  
 
        DRAM  
                    DRAM stands for dynamic random access memory  
.It is a type of memory that is used in most computer. 
 
       SRAM 
                    SRAM stands for static random access memory .The  
memory cells are made from digital gates   .Each cell can store  
data without any need  of frequenty recharging.

What is ram ?

What is Ram ? Ram stands for random access memory It is also called...

What is cpu ?

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what is cpu ? 
 
                                       Cpu stands for central processing unit 
   .It is the brain of the computer .It is the most  important component of a computer . It is also called processor .A computer  
cannot  work  without cpu . 
                                        All computer have a centeral processing unit .            Cpu is located in the mother board . 
 
Parts of cpu . 
                     cpu consists of two main units . 
             1  .  Arithmetic & logic unit  
             2  .  control unit 
       
 1>         ALU   
              Alu  is a part of cpu . Actual execution of instruction takes  
              place in this part .It consists of two main units . 
          1  .  Arithmetic unit 
          2  . Logic unit  
 
2> 
 
      control unit  
                        Control unit is an important components of cpu . 
It act like a super wiser of the computer.

What is cpu ?

what is cpu ? Cpu stands for central processing unit .It is the brain ...

What is Osi model ?

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What is osi model ? 
                                                               osi stands for open system interconnection  .An open system is a model that allows any two  
 systems to communicate even if their architectures  are differents 
 .osi models developed by international standard organization . 
 
osi models connists of seven layers . 
 The layers are connected into two groups . 
1   .   upper layer 
2   .   lower layer 
 
 Differents layers of osi model . 
  7  .  Application layer 
 
  6  .  Presentation layer  
 
   5  .  Session layer  
 
   4  . Transport layer 
 
    3  .  Network layer 
 
   2  .  Data link layer 
 
   1  .  Physical layer

What is Osi model ?

What is osi model ? osi stands for open system int...

What is network topology ?

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What is network topology ? 
                                                          A  network can be arranged in  
        in different ways . The physical layout or arrangement 
        of connected devices in a network is called network topology. 
        It is the shape of network . 
        Different network topologies are as follows. 
         1.    Bus topology  
         2.    ring topology 
         3.    mesh topology  
         4.    star topology  
         5.    tree topology  
          
   Bus topology . 
                            bus topology is the simplest type 
of network. 
    In bus topology all computers or network nodes are connected 
   to a common communication medium. 
 
Star topology . 
 All computer in star topology are connected with a central device called a hub . Star topology is mostly used in client -server .network 
    
  Ring topology  
                         IN ring topology , each computer is connected to the next computer   with the last one connected to the first. 
Tree topology 
   
Tree topology 
                     A tree topology combines the charecteristics of bus  
       and star topology .it consists of different groups of computer  
       attached in star topology . 
 Mesh topology  
 
                       IN a mesh topology every device in the network 
            is physically connected to every other device in the network.

What is network topology ?

What is network topology ? A network can be arranged in ...

What is hard disk ?

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write a short note on hard disk . 
                                                   Hard disk is a type of  
magnetic disk .A hard disk consists of several circular disks called  
platters . The platters are used to store data .A platter in a hard disk  
is coated with a magnetic material. The hard disk in most personal  
computers fixed inside the system unit . 
 
Characteristics of hard disk . 
 
      .  hard disk provides large storage capacity . the capacity of 
computer hard disk is 1500 GB and more . 
     .   It is much faster than floppy disks . 
     .   It is the primary media for storing data and programs . 
     .   It is more reliable than floppy disk . 
     .   Data stored on hard disk is faster than floppy disk. 
       parts  
 
      .  Hard disk contains one or more metal plats coated with iron              oxide . 
      .  It is usually fixed and not portable . 
      .  It is more expensive than diskette . 
      .  It can store large amount of data . 
      .  Its data access speed is faster than diskette .  
      .  It can not be damaged easily due to  dust and heat .

What is hard disk ?

write a short note on hard disk . Hard disk is a type of magnetic ...

What is key board ?

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What is key board   ? 
          Key board is the most commonly used input device. 
Data is enter mostly using  key board.The buttons on the key 
 board are called keys. A standard key board contains over 100 
keys .A key board contains numeric keys ,alphabetic, functions, 
and special purpose keys. 
A standard key board is normally called QWERTY key board. 
 
Main parts of keyboard . 
 
 1.                  Function keys 
2.                   Main key board 
3.                   numeric  keys 
4.                  Additional keys 
 Esc key 
           Esc key is used to terminate a command. 
 
Tab key 
                   Tab key is used to move the cursor to next tab stop. 
 
Shift key 
              Shift key is used for various purpose .upper case letters ' 
and upper symbol shown on certain keys 
Control key  
                          Control key is pressed i combination with other  
          keys to execute commands .

What is key board ?

What is key board ? Key board is the most commonly used input device. Data is enter mostly using key board...

What is computer ?

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What is computer ? 
                                A computer is a machine that can be programmed to accept data ,process data into useful information and store it for later use .a computer consists of hardware and software .The machine is known as hardware .The programs are called software .The processing of input to output is directed by the software but performed by the hardware.  
 
Components of computer   ? 
                                            
1                           Input  Devices 
 
2                           output devices 
 
3                           processing Device 
 
4                           Storage devices 
      
 
Input devices . 
                          The data that is given to the computer is called  
                          input . 
Output devices  . 
                         The data processed into useful 
                                 information is called output. 
Types of storage devices . 
            1      Primary storage devices 
             2     secondary storage devices

What is computer ?

What is computer ? A computer is a machine that can be programmed to accept data ,p...

What is mouse ?

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What is a mouse ? 
                              Mouse is the most widely used pointing device .It is a small and lightweight  
                           input device .Mouse is moved on a flat surface to control the movement of the  
                            cursor or 
                             pointer on a screen.It is attached to the computer by a cable or wireless  
                              connection. 
                             .Mouse is very easy to use .It is mostly used in graphics application  
                
Buttons of mouse? 
 
                               A mouse usually has two or three buttons .These buttons are used to  
                          perform different tasks. It may also include a scroll through long document. 
                              the mouse  contains a small ball at the bottom. The movement of the cursor                                   depends on movement of ball. 
     
 What is track ball   ?                     
                                
                                     A trackball can be used as an alternative to a mouse.This device has  
                                      buttons   similar to those on mouse . It has a large rotating ball on the                                             top.the body of  the of the track ball is not moved .The ball is rolled with                                         fingers.The position  
                                      of the cursor on the screen is controlled by rotating the ball. 
 
 Advantage of track ball?  
                          
1st 
                An advantage of the trackball is that it takes less space to move than 
                                         mouse. Trackball is often included in laptop .  
2nd 
                                         It can also be used as separate input devices with standard desktop  
                                                                computer.

What is mouse ?

What is a mouse ? Mouse is the most widely used pointing device .It is a small and li...

Windows Operating System

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What is operating  system ? 
                                            And computer  can do without operating system? 
 
 
 
                                      Basically 
                                                     An operating system is system software that provides an 
                                   interface for user to interact with the computer . It controls the execution 
                                of all types of software or,programs . 
                                2nd Ans 
                                A computer cannot do  anything without operating system.  operating system 
                                must be installed on every computer . 
                               An operating system is responsible to allocate system resources.These 
                              resources include memory,processor,disk space and peripheral devices 
                              such as monitor , printer and modems etc. 
                            
 
Types of operating system ? 
                                               There are two types of operating system . 
                                              1st 
                                        Graphical user interface operating  system. 
                                       2nd 
                                         command-line operating system. 
 
What is the purpose of  operating system ? 
  There are two purpose of operating system. 
1st 
      
It manage hardware and software resources of computer .The resources include processor 
,memory and disk space etc . 
 
2nd 
It provides a consistent way for application to interact with the hardware without 
knowing all the details of the hardware.

Windows Operating System

What is operating system ? And computer can do without operating system? ...