refer to all computer instructions in general or to any specific set of computer instructions. It is inclusive of both machine instructions and source code (more human-understandable instructions that must be rendered into machine code by compilers or interpreters before being executed). On most computer platforms‚ software can be grouped into a few broad categories: software is the basic software needed for a computer to operate. software refers to one or more computer programs and data held in the
Free Computer program Computer software Programming language
PRELIM COMPUTER What is a Computer? A computer is an electronic machine that can be programmed to accept data (input)‚ process it into useful information (output)‚ and store it in a storage device for future use Characteristics of a Computer •It’s a machine. •It is electronic. •It is automatic. •It can manipulate data. •It has memory •It has logical function Capabilities of a Computer • Speed • Accuracy • Repetitiveness • Storage • Programmable Limitations of a Computer • Cannot operate without
Premium Computer Personal computer
Data Processing All through the different stages in civilization‚ man has always tried to look for ways to simplify work and to solve problems more efficiently. Many problems involved numbers and quantities‚ so man started looking for easier ways to count‚ to add‚ subtract‚ multiply and divide. As society has grown in both size and complexity‚ so have data that are generated by it through time. Definition of Terms Data – is defined as any collection of facts. Thus sales reports‚ inventory
Free Computer Decimal Binary numeral system
connection of a device (for example‚ a computer or a router) to the Internet. Topics discussed in this section: Address Space Notations Classful Addressing Classless Addressing Network Address Translation (NAT) Note An IPv4 address is 32 bits long. The IPv4 addresses are unique and universal. The address space of IPv4 is 32 2 or 4‚294‚967‚296. Figure 4.1 Dotted-decimal notation and binary notation for an IPv4 address Example 4.1 Change the following IPv4 addresses from binary notation to
Premium IP address
Data Input Methods Optical data readers The best data input method for printed questionnaires would be Optical Data Readers. Optical Data Readers are a special type of scanning device to be used on documents. Optical Data Readers fall under two categories‚ optical mark recognition (OMR) and optical character recognition (OCR) (Stair‚ R.‚ Reynolds‚ G.‚ 2004). Printed questionnaires which‚ for instance‚ can be used for surveying groups of people regarding a particular subject can utilize OMR through
Premium Hard disk drive Computer data storage Floppy disk
starts here" and "Internet of Everything" advertising campaigns. These efforts were designed to position Cisco for the next ten years into a global leader in connecting the previously unconnected and facilitate the IP address connectivity of people‚ data‚ processes and things through cloud computing applications and services. Cisco’s current portfolio of products and services is focused upon three market segments—Enterprise and
Premium OSI model Ethernet Data Link Layer
Land Speed Record The land speed record (or absolute land speed record) is the highest speed achieved by a wheeled vehicle on land. There is no single body for validation and regulation; in practice the Category C ("Special Vehicles") flying start regulations are used‚ officiated by regional or national organizations under the auspices of the Fédération Internationale de l ’Automobile. The record is standardized as the speed over a course of fixed length‚ averaged over two runs (commonly called
Premium
TYPICAL QUESTIONS & ANSWERS OBJECTIVE TYPE QUESTIONS Each question carries 2 marks. Choose the correct or best alternative in the following: Q.1 In the relational modes‚ cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of constraints. Ans: A Q.2 Relational calculus is a (A) Procedural language. (C) Data definition language. Ans: B Q.3 The view of total database content is (A) Conceptual view. (C) External view. Ans: A Q.4 Cartesian product
Premium SQL Data modeling Relational model
Before computers there were not telephone answering machines‚ handheld calculators‚ fax machines‚ personal computers. People did what they had to do without these things. People wrote letter by hand or with a typewriter‚ they also kept track of data and numbers in ledgers. They were not texting each other‚ there was either in person or over the phone. . Computers are integral to our daily lives and there are millions used daily. Computers are used at home‚ work‚ and school. They are also embedded
Premium Personal computer Computer
Technology in Classrooms: One Laptop per Child-A Failed Idea? Is the use of technology benefiting the students in classrooms today or is it taking away from their education? Should students be allowed to have easy access to a computer during a lecture to find relevant information or is it a distraction that puts their attention onto something completely off subject? It has certainly been argued both ways. As technology becomes more prominent in everyday life‚ the global world changes at the
Premium Third World Computer First World