Q111. What does a use case diagram represent? Internal logic of classes User interactions Backend operations Data flow
Q112. What is an activity diagram used for? Show method calls Display task flow Represent structure Map database
Q113. What does the sequence diagram show? Data flow Step-by-step system interaction Hardware components Actor list
Q114. What does a class diagram represent? Database structure Class organization System interface User interactions
Q115. Which is a use case in an online library system? Borrow books Backup system Write user manual Update software
Q118. What does UML stand for? Unified management language Unified modeling language Universal modeling language Unified model layout
Q119. What is the purpose of UML diagrams in software systems? Increase complexity Improve communication Make system harder to manage Show system errors
Q120. What is the purpose of a contingency fund in cost estimation? To cover unexpected costs To pay for marketing expenses To hire additional developers To purchase new hardware
