Pt1420 Unit 1 Question Paper

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Recommended: Incremental development software models

1. State why it is a good idea to test a module in isolation from other modules and why different modules making up a software product are almost never integrated simultaneously?

Answer: During unit testing, each module is unit tested to determine the correctworking of all the individual modules. It involves testing each module inisolation as this is the most efficient way to debug the errors identified atthis stage. So it is always a good idea to test a module in isolation fromother modules.

2. Why are iterations usually limited when the waterfall model is used?

Answer: It is because the waterfall model is a document-driven model with documents produced at the end of each phase. Because of the cost of producing and approving documents, …show more content…

So software evolution does not stop until the end of the lifetime of the software and so as the software development does not stop. Again, Few software systems are now completely new and a more realistic model of software development is of an iterative process that lasts for the lifetime of the software.

4. Explain why change is inevitable in complex systems and give examples (apart from prototyping and incremental delivery) of software process activities that help predict changes and make the software being developed more resilient to change.

Answer: Software changes is inevitable. Change is inevitable in complex systems because of various causes like the requirements gathering, their design, specifications, user requirements etc. All software systems must evolve to meet the ever - expanding needs of its users. Gathering entire requirementsat a single stretch may sometimes be not possible for complex systems. In such cases, the changes are made to the systems after the development. Also, user requirements change from time to time. So to accomplish their requirements, changes are made. Designing complex systems and accomplishing all the needs and requirements is difficult in complex systems. So these are designed and developed with initial requirements and then changes are made to the existing

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