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Testing is primarily aimed at detecting defects, verifying the functionality, and providing information to stakeholders for decision-making. While investigating defects is part of the testing process, fixing defects is not typically considered an objective of testing; it falls under the development activities. The main objectives of testing include preventing defects (through early testing activities), gaining confidence in the system, and providing valuable information to stakeholders​​.

It is generally not feasible to perform exhaustive testing due to time and resource constraints. Instead, testing efforts should be focused using risk analysis and priorities to ensure the most critical areas are tested thoroughly. This approach helps in maximizing the effectiveness of the testing process while managing resources efficiently.

Maintenance testing is essential when there is a need to ensure that the software continues to function correctly after it has been modified. Migration to a new platform is a significant change that can impact the software's functionality, requiring thorough maintenance testing to verify that the software performs as expected in the new environment. This ensures that any platform-specific issues are identified and resolved​​.