Perfect Computer Notes

Q1. Define computer, explain characteristics of a computer. Computer is an electronic machine that takes data and instructions, processes data according to the given instructions, gives results and stores them. Characteristics of Computer :   1. Speed 2. Storage 3. Processing 4. Accuracy 5. Recalling 6. Communication 7. Versatile 7. No Feelings 9. No Intelligence Q2. Explain uses of computer in different fields of life. OR Explain Impacts of Computer Technology on Society. 1. Uses of Computer at Home 2. Uses of Computer in Education 3.   Uses of Computer in Industry 4. Uses of Computer in Business 5 . Uses of Computer in Medical Field Q3. Write down a note on types of computer. Types of Computer Computers can be divided into the following types on the basis of their working: 1. Analog Computers Analog computer is used to measure continuous values. It measures a physical property like voltage, pressure, speed and temperature Analog computer is mainly used in the field of enginee

MMC stands for multimedia card. SD stands for secure digital card. System Bus  is used to connect main components of a computer such as cpu and main memory. A Port is an interface or a point of attachments. POS stands for Point Of Sale terminal. ATM stands for Automated Teller Machine. PIN stands for Personal identification number. Kbps stands for kilobits per second. Mbps stands for megabits per second. A port that transmits one bit at a time is called Serial Port. A type of port that transmits many bits at a time is called Parallel Port. LPT stands for Line Printer. Examples of system software are Operating System, Utility Programs and Device Drivers. Examples of operating systems are DOS, Windows, Unix and Linux. Examples of Utility programs are File Manager, Image Viewer, Disk Scanner and File Compressor. Software used to detect and remove viruses is called Antivirus . Examples of antivirus programs are Mcaffee, Avast,

(70)10 = (1000110). [ divide 70 by 2 repeatedly until quotient is zero, write down remainders from bottom to top.] NTFS is abbreviation for new technology file system     . USB stands for Universal serial Bus. AGP stands for Accelerated graphical port. Roman number system is an example of non-positional number system. PPP stands for point-to-point protocol. SCSI is pronounced as Small computer system interface. MS Excel is an example of Applications software. Windows is an example of          system           software. WAN as a network stands for    wide area network. DNS stands for Domain name server. CPS stands for   Character per second. BIOS stands for   Basic input-output system. LCD stands for Liquid crystal display     . POST stands for   ­­­­­­­­­­­­­­­­­­­­­­­­­_Power  ON Self Test How many rows are in MS Excel _65536. Modem stands for Modulator and demodulator. CPM stands for Character per minute ENIAC stands for Electro