Polling, Spooling and Interrupt in Operating System

1.     Polling: Polling is a process in which Operating System continuously integrates if any peripheral needs attention of OS. 2.     Interrupts: An interrupt is a signal to the processor emitted by hardware or software indicating an event that needs immediate attention. An interrupt alerts the processor to a high-priority condition requiring the interruption of the current code the processor is executing (the current thread). 3.     Spooling: Acronym for simultaneous peripheral operations on-line, spooling...

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Data Protection Act 1998

The Data Protection Act 1998 sets out rules for processing personal information, and it applies to some paper records as well as those held on computer and some automatically processed data, for example, document image processing, audio/video, photographs and CCTV. The Act gives individuals certain rights, and imposes obligations on those who record and use personal information to be open about how information is used and to follow eight data protection principles: Data Protection PrinciplesPersonal data must be processed following these principles...

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Tackling the exam papers (Exemple candidate response)

Tackling the exam papers General tips In many cases, you can find clues about the answer within the question itself. The main 'clues' are: •       the number of marks given for the question •       the key instruction words e.g. Name, Describe, Compare, Evaluate ... •       instruction/question text written in bold typeface. The number of marks The...

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2 Data (Computer Science)

Data and information Data are the raw facts and figures that we give to a computer as input. Data lack sufficient context and processing to have meaning. When data are processed to have context and meaning, and to search, sort and make calculations, they become known as 'information'. Data collection and preparation Data may need preparation after collection and before they are used as an input, to ensure that they are in the correct format. Data are encoded to summarise them, so that they are quicker to...

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