Answer any FOUR questions out of SIX .
All questions carry equal marks.
Several of the questions set are looking for a general understanding of Open Systems aspects. Your answers will be more likely to gain good grades if you can refer to specific examples where relevant, to illustrate points you have made. Scalability has already been achieved and portability is becoming less of a problem. Inter-operability may be less critical as Unix is rationalised. Perhaps one of the most important development in Open Systems is the trend to reusability as provided by advances in standards in object-broking.