Question

1. Explain pair programming. Write the advantages of such programming 2. Extreme programming expresses user requirements as stories, with each story written on a card. Write the advantages and disadvantages of this approach to requirements description. 3. When code is integrated into a larger system, problems may surface. Explain how configuration management can be useful when handling such problems. 4. Explain the differences between software reengineering and refactoring? 5. Explain why problems with support software might mean that an organization must replace its legacy systems.

Answer 1

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1.
Answer)
the pair programming is the approach of performing programming wherein two programmers share and code on one workstation such as a PC. Two programmers, one - a driver writes the code, another the observer observes, or reviews the code as it is written. Also programmers may choose to switch the roles. During the review the observer will come up with ideas for the improvement and also future problems that can be addressed right away.

The advantages of this programming approach are:
Code is likely to have fewer defects, also preventing the mistakes as they are made.
Two programmers may have different levels of experience which makes it a technique to perform the task.
Two programmers will address information that is relevant in different ways and thus it is a good way to go.
There is learning since the lower experienced programmer can learn from other programmer's experiences.
Team building and communication improves between the programmers.

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