MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -During the Analysis phase of the SDLC, analysts identify processes and data flows in a logicaldata flow diagram (DFD). In the design phase, physical DFDs are created.

Detailed explanation-2: -Data flow diagrams can be used in both Analysis and Design phase of the SDLC.

Detailed explanation-3: -A data flow diagram (DFD) is a graphical or visual representation using a standardized set of symbols and notations to describe a business’s operations through data movement. They are often elements of a formal methodology such as Structured Systems Analysis and Design Method (SSADM).

Detailed explanation-4: -The objective of a DFD is to show the scope and boundaries of a system as a whole. It may be used as a communication tool between a system analyst and any person who plays a part in the order that acts as a starting point for redesigning a system. The DFD is also called as a data flow graph or bubble chart.

Detailed explanation-5: -Data Flow Diagrams (DFD) or Bubble Chart Its graphical nature makes it a good communication tool between user and analyst or analyst and system designer. It gives an overview of what data a system processes, what transformations are performed, what data are stored, what results are produced and where they flow.