Perfect Computer Notes

  Q. Explain Customized software and Packaged software. a) Customized Software Customized software is a type of application software that is designed for a particular customer or organization. When packaged software does not fulfill needs of an organization then a programmer / software developer / software engineer is hired. The programmer will develop needed custom software for that organization according to the organizations specific needs and requirements. Student Information software developed for Govt. Post Graduate College of Commerce, Rahim Yar Khan is an example of customized software .  It will be used to store all related data about students, admissions and examinations etc. b) Packaged Software Packaged software is a type of application software that is developed for sale to the general public. It is also known as off-the-shelf software or Pre-Written software. It facilitates the people to perform day-to-day activities. Examples of packaged software are w

Q. Write notes on the following: WWW, ISP, WEB PAGE, WEB SITE, WEB SERVER, WEB BROWSER WWW WWW stands for World Wide Web. It is also called web. It is the collection of all connected web documents stored on different web servers. These documents contain information in the form of text, pictures, audio and video clips. WWW has many advantages: · finding a job · searching information · advertisement for business · weather forecast · entertainment · education Difference between Internet and World wide web: The main difference between internet and World Wide web is that World Wide Web is only a service provided by internet. It provides access to web documents. While internet provides many other services also like FTP, TELNET and chatting etc. ISP (Internet Service Provider) OR IAP (Internet Access Provider ISP stands for internet service provider. It is a company that provides internet connections to users. For example WOL net, PAK net, CYBER net etc. are ISPs. To connect to i

Q.1 Define Data and Information. Differentiate between Data and Information. 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. Examples of Data 1) 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) During census, data of all citizens is collected. INFORMATION Processed data is called information. When raw facts and figures are arranged in some order then they become information. Information has proper meanings. Information is useful in decision-making. Actually we process data to convert it into information. Exapmle of Information: 1) Stored data of students can be used to print address labels of students. 2) Census data is used to get report/information about total population of a country and literacy rate etc. Q.2 Describe types of Data. Ther