2015/ 2016 COMPUTER STUDIES Objectives/ Essay/ Real Questions And Answers

COMPUTER OBJ 1 BBAABBCDDD 11 DCDBCDADBB 21 ABCDCDADCB 31 BCDDBADCCA 41 BCCDBCADAC (1a) operating system is an organized collection of procedures and techniques for operating a computer. (1b) -providing ease of use of the hard ware component for the users -providing assistance to the computer center adminstrators. (1ci) -Desktop Publishing software -Word Processing software (1cii) -assembler -compiler (1d) -microsoft acesss -microsoft visual basic (2a) A computer file is a resource for storing information, which is available to a computer program and is usually based on some kind of durable storage. (2b) (i) -Performance:Fast performance with a rapid response time is critical. Transaction processing systems are usually measured by the number of transactions they can process in a given period of time. -Ease of use:Often users of transaction processing systems are casual users. The system should be simple for them to understand, protect them from data -entry errors as much as possible, and allow them to easily correct their errors. ======= (2bii) (2ci) -Cyberterrorism -Booming Cybersecurity Industry (2cii) -User account access controls and cryptography -firewalls (3a) The systems development life cycle (SDLC) , also referred to as the application development life-cycle, is a term used in systems engineering, information systems and software engineering to describe a process for planning, creating, testing, and deploying an information system. The systems development life- cycle concept applies to a range of hardware and software configurations, as a system can be composed of hardware only, software only, or a combination of both. (3b) - planning, -analysis - design -implementation, (3c) -Portability -Readability -Efficiency -Flexibility (5a) An algorithm is any set of detailed instructions which results in a predictable end-state from a known beginning. Algorithms are only as good as the instructions given,. (5b) -Precision -Uniqueness -Finiteness (5c) write the algorithm yourself