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Understanding the Development Phase in SDLC:

The development phase involves translating system design specifications into actual software.

This includes coding the system using programming languages and integrating modules as per the design.

Why Other Options Are Incorrect:

Option B: Describes the maintenance phase, which focuses on updates and corrections post-deployment.

Option C: Relates to the testing phase, where interoperability and functionality are verified.

Option D: Refers to the implementation phase, where the system is deployed for user operations.

In the maintenance phase of the SDLC, the goal is to ensure the system continues to meet business needs by fixing defects, applying updates, and implementing enhancements. This phase ensures the system remains secure, reliable, and effective after deployment.

Option B: Gathering requirements occurs in the planning/analysis phase.

Option C: Unit testing is part of the testing phase, not maintenance.

Option D: Designing and deploying the architecture occurs in development and implementation phases.

Thus, the goal of the maintenance phase is to fix defects and update the software.