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master file: Master file is a computer file that is used in collection of records pertaining to one of the main subjects of an information system, such as customers, employees, products and vendors. Master files contain descriptive data, such as name and address, as well as summary information, such as amount due and year-to-date sales.
Transaction file : transaction file is a computer file used to hold data during transaction processing. The file is later used to update the master file and audit daily, weekly or monthly transactions. For example in a busy supermarket, daily sales are recorded on a transaction file and later used to update the stock file. The file is also used by the management to check on the daily or periodic transactions.
(i)STP (Shielded twisted pair) is a twisted pair cable enclosed in foil or mesh shield.
UTP (Unshielded twisted pair) is a cable with wires that are twisted together.
(ii)In Shielded twisted pair Installation of cables is difficult comparatively.
In Unshielded twisted pair, Easily installed as cables are smaller, lighter, and flexible.
Octal is (arithmetic/computing/uncountable) the number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7
Binary is (mathematics/computing/uncountable) the bijective base-2 numeral system, which uses only the digits. example 110100
• Web address is the URL of your web page
Email is used to send electronic messages to each other using computer networks.
• Email you can always receives electronic mails while
web address is not used to receive any mails sent to you.
• The email address is oftenly used in lower case
websites or web address are written in mixed letters.
• Example of Web address
• Example of Email address
• POP: Post Office Protocol
• SMTP: Simple Mail Transfer Protocol
Real-time operating system(RTOS):Is any operating system intended to serve real-time applications that process data as it comes in, typically without buffer delays. Processing time requirements are measured in tenths of seconds or shorter increments of time.
Basic input-output system(BIOS ):Is non-volatile firmware used to perform hardware initialization during the booting process, and to provide runtime services for operating systems and programs. The BIOS firmware comes pre-installed on a personal computer’s system board, and it is the first software to run when powered on.
Expansion card: Expansion card is an electronic card/board that is used to add extra functionality to a computer. It is inserted into an expansion slot on the motherboard of a computer. Expansion cards contain edge connectors that are used to create an electronic link between motherboard and card, thus enabling these two to communicate.
Power-on self-test(POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. The results of the POST may be displayed on a panel that is part of the device, output to an external device, or stored for future retrieval by a diagnostic tool.