Software Engineering

3. The below figure illustrates the hierarchy of modules in a software system. De scribe the sequence of modules tests for integrating the modules using a bottom- up approach; a top-down approach; a big-bang approach; a sandwich approach.(30 points) F1 F2 El E2 G2 G3 G4 G1 4. Maintenance activities consume a large portion of the total life-cycle budget. The primary goal of software development should be production of maintainable software systems. What are the primary activities in software maintenance? (20 points)