WGU D278 Units 8 & 9 Exam Study Guide Questions And Answers A+ Pass

WGU D278 Units 8 & 9 Exam Study Guide Questions And Answers A+ Pass Analysis Phase - Answer- defines a program's goals Design Phase - Answer- Defines specifics of how to build a program Implementation phase - Answer- involves writing the program Testing Phase - Answer- checks that the program correctly meets the goals Example of analysis phase: - Answer- The program should support mean, median, max and min calculations Example of design phase: - Answer- Each calculation will be a function. The use types a letter to invoke each calculation. Example of implementation phase: - Answer- A programmer writes each function using statements Example of testing phase: - Answer- A programmer checks that each function works. Waterfall approach - Answer- Building a program by going through each phase sequentially and not returning to a finished phase. Agile/Spiral approach - Answer- Building a program by doing small amounts of each SDLC Phase repeatedly, adding more each time SDLC - Answer- Software Development Life Cycle Objects - Answer- A grouping of data (variables) and operations that can be performed on that data (functions) Abstraction - Answer- means to have a user interact with an item at a high-level, with lower-level internal details hidden from the user (aka information hiding or encapsulation) abstract data type (ADT) - Answer- A type whose creation and update are constrained to specific well-defined operations Universal Modeling Language - Answer- modeling language for software design that uses different types of diagrams to visualize the structure and behavior of programs structural diagram - Answer- visualizes static elements of software, such as the types of variables and functions used in the program behavioral diagram - Answer- visualizes the dynamic behavior of software, such as the flow of an algorithm activity diagram (flowchart) - Answer- implementation phase. describes high-level sequence of computations use case diagram - Answer- behavioral. analysis phase. shows various things a user might do such as enter data, compute an absolute value, compute a mean, etc. behavioral diagram used to visually model how a user interacts with a software program.