Which type of software maintenance modifies a functional software application to add new user features, enhance performance, or improve maintainability?
Option A is correct. Perfective Maintenance enhances software usability, execution speed, or functional capability based on user requests.
Which type of software maintenance involves modifying software to detect and correct latent faults before they manifest as active operational failures?
Option B is correct. Preventive Maintenance (Software Re-engineering) updates code and documentation proactively to improve future maintainability and prevent failures.
What Software Configuration Management (SCM) artifact represents a formally approved version of a configuration item that serves as a reference for future development?
Option C is correct. A Baseline in SCM is a milestone specification or release that has been formally reviewed and agreed upon, forming the basis for further evolution.
In software reliability metrics, what does MTBF stand for?
Option A is correct. MTBF (Mean Time Between Failures) is the expected operational time between two consecutive system failures ($MTBF = MTTF + MTTR$).
What metric represents the average time required to repair a failed software module and restore it to operational state?
Option B is correct. MTTR (Mean Time To Repair) measures the average time elapsed from defect detection until system restoration.