MODULE 2 : Computer concepts Exam Questions with correct Answers

computer - Answer- a multipurpose device that accepts input, processes data, stores data, and produces output, all according to a series of stored instructions input - Answer- Data that is entered into the computer system via an input or storage device. output - Answer- the result produced by a computer process data - Answer- A systematic series of actions that a computer performs to manipulate data; typically represented on a DFD by a rounded rectangle. Central Processing Unit (CPU) - Answer- Also known as the microprocessor; the brains of the computer. computer program - Answer- set of instructions that directs the computer to perform a variety of tasks. software - Answer- (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory stored program - Answer- a series of instructions for a computing task can be loaded into a computer's memory 3 types of software - Answer- system, development application Application Software - Answer- software program that helps you use the computer to do particular tasks Examples of application software - Answer- Word processing, spreadsheet, presentation, database system software - Answer- Consists of the programs that control or maintain the operations of the computer and its devices. Example of system software - Answer- Microsoft Windows ,OS Development Software - Answer- used for creating software applications, Web sites, operating systems, and utilities example of development software - Answer- web sites , operating systems and utilities digital electronics - Answer- Electronic system best represented by a simple switch, where there can only be two conditions in the circuit - either on or off. integrated circuit - Answer- a set of microscopic electronic circuits etched onto a thin slice of semiconducting material computer chip - Answer- a small piece of semiconducting material, usually silicon, on which integrated circuits are etched microchip - Answer- A miniature electronic circuit used to control computers and most other electronic devices semiconductor - Answer- A substance that can conduct electricity under some conditions Motherboard - Answer- A circuit board that contains all of the computer system's main components. system board - Answer- houses all essential chips and provides connecting circuitry between them form factor - Answer- the size, shape and physical layout of computer components such as case, motherboard, and power supplies system unit - Answer- what holds the system board 4 components of a digital device that need maintence - Answer- 1. system unit 2. keyboard 3. screen 4. battery Oleophobic coating - Answer- designed to repel oils from fingertips lithium ion battery - Answer- very popular secondary battery; uses lithium ions to conduct current and is light, rechargeable, and produces a nearly constant potential as it discharges supercomputers - Answer- Computers that are among the fastest of any in the world at the time of their introduction. mainframes - Answer- Large-capacity, high-performance computer that can process large amounts of data very rapidly servers - Answer- Computers that exist only to provide things to others. personal computer - Answer- a computer designed for use by one person at a time.