What is data in computer? ( Agami best computer training center Institute in Tangail)

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Agami best computer training center Academy in Tangail

A virus is a computer code or program, which is capable of affecting your computer data badly by corrupting or destroying them.

 

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What is data?

Data are often defined as a representation of facts, concepts, or instructions in an exceedingly formalized manner that can be suitable for communication, interpretation, or processing by a human or electronic machine.

Data is represented with the assistance of characters like alphabets A − Z, a − z, digits 0 − 9 or special

characters+, − , /, ∗ , < , > , = etc. 

What is Information?

Information is defined data that has some meaningful values for the receiver. Information is that the processed data on which decisions and actions are based. For the choice to be meaningful, the processed data must qualify for the subsequent characteristics:

  Timely - Information should be available when required.

  Accuracy - Information should be accurate.

  Completeness - Information should be complete.

Data Processing

Collection, manipulation, and processing collected data for the specified use are understood as processing. it's a way normally performed by a computer; the method includes retrieving, transforming, or classification of data.

However, the processing of knowledge largely depends on the subsequent − The volume of knowledge that requires to be processed The complexity of knowledge processing operations Capacity and inbuilt technology of respective computing system skills, Time constraints.

Methods of Data Processing

• Single user programming

• Multiple programming

• Real-time processing

• On-line processing

• Time-sharing processing

• Distributed processing

Single User Programming

It is usually done by a single person for his personal use. This technique is suitable even for small offices.

Multiple Programming

This technique provides facility to store and execute more than one program in the Central Processing Unit (CPU) simultaneously. Further, the multiple programming techniques increases the overall working efficiency of the respective computer.

Real-time Processing

This technique facilitates the user to have direct contact with the computer system. This technique eases data processing. This technique is also known as the direct mode or the interactive mode technique and is developed exclusively to perform one task. It is a sort of online processing, which always remains under execution.

Online Processing

This technique facilitates the entry and execution of data directly; so, it does not store or accumulate first and then process. The technique is developed in such a way that reduces the data entry errors, as it validates data at various points and also ensures that only corrected data is entered. This technique is widely used for online applications.

Time-sharing Processing

This is another form of online data processing that facilitates several users to share the resources of an online computer system. This technique is adopted when results are needed swiftly. Moreover, as the name suggests, this system is time-based.

Following are some of the major advantages of time-sharing processing −

• Several users can be served simultaneously

• All the users have almost equal amount of processing time

• There is a possibility of interaction with the running programs

Distributed Processing

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This is a specialized data processing technique  which various computers (which are located remotely) remain interconnected with a single host computer making a network of computers.

All these computer systems remain interconnected with a high-speed communication network. This facilitates communication between computers. However, the central computer system maintains the master database and monitors accordingly.