"During the of the systems development life cycle (SDLC), an information system is operating, enhancements and modifications to the system have been developed and tested, and hardware and software components have been added or replaced."

Maintenance Phase

Explanation:

Maintenance Phase -

It refers to the phase in the system development life cycle , where alterations are done in the documentation , software and hardware in order to support the operational effectiveness , is referred to as the maintenance phase .

The phase requires , correct problems , increase security etc.

Hence , from the given information of the question ,

The correct answer is maintenance phase .

answer; availability;