Perfect Computer Notes

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...

Q1. Define Network with example. Give importance of computer network.   COMPUTER NETWORK A computer network is a set of two or more computers connected together to share information and other resources. The computers in a network can share: Data, information  and Files Resources (printers, Cd-Rom Drives, DVD- Rom Drives, CD- Writers, hard disk, modems) Programs / software EXAMPLES OF COMPUTER NETWORK Computer network can be used in an organization's office. Different employees and managers in the office and organization can share common information. Internet, is also an example of a computer network. Internet is a network of millions of computers connected through phone lines. People can share information, files and talk with one another through internet. Internet cafe also uses computer network for internet sharing on all computers. A Computer laboratory in a school or college may use local area network for sharing data and other reources like printers...

Q.1 What is internet?             Internet is the network of networks around the world. It is made up of thousands of smaller networksInternet provides following main facilities:  ·  E- mail                    ·   Chat           ·Searching  jobs    ·       Advertising for business            ·E-commerce     ·Searching information Q.2 Define :WWW, ISP, WEB PAGE, WEB SITE, WEB SERVER, WEB BROWSER 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. WWW has many advantages: · finding a job    ·      searching information · ...

Q1. Define software. Explain different types of software. Software is a set of instructions that tell a computer what to do. Examples of software are: MS Word, MS EXCEL, MS POWER POINT, WinZip, Norton Anti Virus, MSN Messenger, MS Windows, DOS, Unix Q2. Explain different types of software. The main types of software are system software and application software. 1 . System Software System software is a set of programs to implement certain functions in a computer system. It controls the operations and components of a computer system. Examples of system software are as follows: •   Operating Systems: Operating system is a software to control overall operations and components of a computer system. e.g., Windows, Unix, Linux and Dos etc. •   Utility Programs: Utility program is used to solve a particular problem of software or hardware, for example, Antivirus program, disk scanner and File Viewer etc. •   Device Drivers: device drier is...

Q1. Define Hardware. What are different types of hardware? The physical parts of a computer are called hardware. Hardware can be touched or seen by us. Different types of hardware components are as follows: Input devices (keyboard, mouse, scanner, digital camera etc.) The Central Processing unit (CPU/Processor) Output devices (monitor, printer, plotter, speaker, data projector etc.) Memory chips (RAM, ROM etc.) Storage devices (hard disk, Floppy disk, CD, DVD etc.) Q2. Define Input devices. INPUT DEVICES:Input devices are used to enter data and instructions into computer memory from external world. Examples include: Keyboard, Mouse, Track ball, Track Pad, Joy stick, Touch Screen, Light pen, Touch Screen, Scanner, Digital Camera, Microphone, Q3. Define Output device. Output devices:Out put devices are used to display results of processing to the user. They perform the following functions: Examples include: Monitor, printer, plotter, speaker Pr...