Software System Evolution Chapter 3

What is software system evolution?

• Software system evolution is the process of changes and updates made to a software system over time to adapt to new requirements, fix issues, and improve performance.

• Software system evolution involves changing hardware components of a system rather than software.

• Software system evolution refers to the process of downgrading software systems to older versions.

• Software system evolution is the process of creating new software systems from scratch.

Why is software system evolution important?

• Software system evolution leads to decreased productivity and efficiency

• Software system evolution is important for adapting to changing requirements, fixing bugs, enhancing performance, and incorporating new features.

• Software system evolution causes instability and security risks

• Software system evolution is irrelevant and unnecessary

What are the key challenges in software system evolution?

• Ignoring security vulnerabilities

• Limiting compatibility

• Maintaining compatibility, managing complexity, ensuring scalability and performance, handling security vulnerabilities, and incorporating new technologies.

• Avoiding new technologies

Explain the concept of legacy systems in software evolution.

• Legacy systems are software applications that are always bug-free and secure.

• Legacy systems are software applications that are easy to upgrade and maintain.

• Legacy systems are cutting-edge software applications with advanced features.

• Legacy systems are outdated software applications still in use, posing challenges in maintenance, integration, and security.

Discuss the role of software maintenance in system evolution.

• Software maintenance is optional and does not impact system evolution

• Software maintenance is essential for the long-term success and adaptability of a system, as it allows for continuous improvement and responsiveness to changing needs.

• Software maintenance only involves fixing bugs, not enhancing the system

• Software maintenance is a one-time task and does not require continuous effort

How does software reengineering contribute to system evolution?

• Software reengineering contributes to system evolution by updating, enhancing, or redesigning existing software systems to meet current and future requirements.

• Software reengineering contributes to system evolution by reducing the functionality of existing software systems.

• Software reengineering contributes to system evolution by ignoring current requirements and focusing on past needs.

• Software reengineering contributes to system evolution by creating new software systems from scratch.

What are the different strategies for software system evolution?

• Preemptive maintenance

• Reactive maintenance

• Corrective maintenance, Adaptive maintenance, Perfective maintenance, Preventive maintenance

• Enhancement maintenance

Explain the concept of software system retirement.

• Software system retirement means keeping the old system running indefinitely without any changes.

• Software system retirement involves upgrading the system continuously without any end date.

• Software system retirement includes transferring all data and functionality to multiple new systems simultaneously.

• Software system retirement involves identifying the system to be retired, planning for its replacement or removal, migrating data and functionality to new systems, and ultimately shutting down the old system.

In the 1980 article “Programs, Life Cycles, and Laws of Software Evolution” by Meir Lehman, he classified of computer programs into 3 types. What are those?

• SPE (Specified, Problem, Evolution)

• SPE (Static, Practical, Embedded)

• SPE (Specified, Problem, Evolving)

• SPE (State, Practice, Embedded)

In Software Evolution and Maintenance, what is COTS?

• Commercial Off-The-Shelf

• Certificate of Titles

• Change of Titles

• Commitment of Traders