What are the different maintenance testing techniques used in the SDLC?

There are several maintenance testing techniques used in the Software Development Life Cycle (SDLC). Some of the commonly used techniques include:

1. Corrective Maintenance Testing: This technique is used to identify and fix defects or issues in the software after it has been deployed. It involves testing and debugging to ensure that the software functions as intended.

2. Adaptive Maintenance Testing: This technique is used to modify the software to accommodate changes in the environment, such as hardware or software upgrades. It involves testing to ensure that the modified software works correctly in the new environment.

3. Perfective Maintenance Testing: This technique is used to improve the performance, efficiency, or usability of the software. It involves testing to verify that the enhancements or optimizations made to the software do not introduce any new defects.

4. Preventive Maintenance Testing: This technique is used to proactively identify and fix potential issues or defects in the software before they cause any problems. It involves testing to ensure that the software is robust and reliable.

5. Emergency Maintenance Testing: This technique is used to quickly address critical issues or defects that require immediate attention. It involves testing to identify the root cause of the problem and implement a fix as soon as possible.

Overall, these maintenance testing techniques help ensure that the software remains functional, reliable, and up-to-date throughout its lifecycle.