Perfect Computer Notes

NEED OF ELECTRONIC DATA PROCESSING Today, no business can exist without information . There is no more business without information. To improve the business there is a need to improve data processing and information system. Now it’s the age of competition that involves information technology for faster and accurate data processing . These days computer is playing a main role in every field of life. It is also playing a central role in business . In business, a large amount of data has to be processed daily. It is impossible to process such a large amount of data without a computer. Explain importance / need of electronic data processing in business We know that a computer can process data accurately and quickly. The need of data processing in business is clear. Following are the reasons: 1) RECORD KEEPING An organization cannot exist without records. Record keeping is a difficult and complex problem. Electronic data processing has simplified it. Receiving, storing, pro

Today we will discuss different types or levels of data processing in detail. Let us define Data processing first. DATA PROCESSING Data processing is the sequence of operations performed on data to convert it into useful information . These operations may be arithmetic, statistical or logical operations. We can arrange or classify data. We can send and receive data from one point to another. Explain different types of data processing TYPES OF DATA PROCESSING (OR) LEVELS OF DATA PROCESSING) There are three types of data processing . 1) Manual data processing 2) Mechanical data processing 3) Electronic data processing We may also use the term Levels of data processing. First level of data processing was manual data processing when there were no calculating devices (before the invention of calculators). Therefore all processing jobs were performed manually by hand with the help of pen , paper and mind. In second level of data processing, machines like calculat

DATA Data is the collection of raw facts and figures. It is without any proper meaning. Data may be collection of words, numbers, graphics or sounds. What is data? Explain different types of data Examples of Data 1) Student Data on Admission Forms When students get admission in a college. They fill admission form. This form     contains raw facts (data of student) like name, father’s name, address of student etc. 2)    Data of Citizens During census, data of all citizens is collected. 3)    Survey Data Different companies collect data by survey to know the opinion of people about their product. 4)    Students Examination data In examination data about obtained marks of different subjects for all students is collected.    Different Types Of Data There are following main types of Data. 1)    NUMERIC DATA Numeric data consists of 0 to 9 digits, + and – sign and decimal point etc. For example, 10, 78, 90.50, -56 etc 2)    ALPHABETIC DATA It consists

After collecting data, it is processed to convert into information. The data is processed again and again until accurate result is achieved. This is called data processing cycle . Data processing cycle involves following three basic activities: Major Activities Involved in Data Processing Cycle Explain Data processing cycle 1. Input 2. Processing 3. Output 1. INPUT It is the process in which collected data is given to computer after converting into binary form. Input step can be further divided into following steps: i) Planning Here objectives of data processing are defined. For example, in examination system, objective is to process student examination data to get result cards. ii) Data Collecting Here data is collected. Data is the raw material for data processing. This must be accurate for getting accurate results. iii) Input Here data is entered into computer. iv) Verification Here collected data is verified to determine whether it is valid for

Topic: Differences Between Data and Information - 14 Differences Here we are going to discuss the differences between two typical terms of information technology: Data and Information . Data is a collection of raw facts and figures about an entity . Data may consist of numbers, characters, audio, video or pictures etc. When these data is processed according to requirements, then it is transformed into INFORMATION . Differences between data and information with examples For example, consider Admission system of a Computer College. The candidates will submit admissions forms filled by them. Now all the facts and figures and picture of candidate on form is called data. These data may consist of name, father's name, date of birth, marks obtained, total marks, address, contact number and a latest photo graph of the candidate. Now the concerned person in the college office will process these data to prepare a merit list. He may calculate percentage of obtained marks of eac

DATA Data is the collection of raw facts and figures. Actually data is unprocessed, that is why data is called collection of raw facts and figures. Define Data and Information with Examples We collect data from different resources. After collection, data is entered into computer for processing. Data may be collection of words, numbers, pictures,  or sounds etc. Examples of Data 1) Student Data on Admission Forms When students get admission in a college. They fill admission form. This form  contains raw facts (data of student) like name, father’s name, address of student, obtained marks, photo graph etc. 2)    Data of Citizens During census, data of all citizens is collected. The staff will go house to house and collect data about citizens like number of persons living in a home, either they are literate or illiterate, number of children, data of each child, cast, religion, Computerized national Identity Card number, address, how many rooms and other facilities in the

Topic:  Different Types of Software with Examples Types of Software Different Types of Software with Examples There are two  main types of software  -  system software and application software . Let us discuss these types of software in detail with examples of each. System Software System software is a set of programs used to implement certain functions in a computer system. System software  controls the overall operations and components of a computer system. We can say that system software is the base on which application programs are executed. System software provides an interface between user and computer. Users use this interface to interact with the computer and perform different jobs on computer. Operating systems like Windows, Linux and Unix are the main example of system software . Similarly device drivers software are also examples of system software. Examples of system software Examples of system software are as follows: •   Operating Systems Op