MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -description of each function presented in the DFD is contained in a process specification (PSPEC). DFD are used to represent data and the processes that manipulate it. of the software is contained in the control specification (CSPEC).

Detailed explanation-2: -A process specification (PSPEC) can be used to specify the processing details implied by a bubble within a DFD. The process specification describes the input to a function, the algorithm that is applied to transform the input, and the output that is produced.

Detailed explanation-3: -The CSPEC contains a state transition diagram that is a sequential specification of behavior. It can also contain a program activation table-a combinatorial specification of behavior. It is now time to consider an example of this important modeling notation for structured analysis.

Detailed explanation-4: -Logical DFD-This type of DFD concentrates on the system process, and flow of data in the system. For example in a Banking software system, how data is moved between different entities. Physical DFD-This type of DFD shows how the data flow is actually implemented in the system.

Detailed explanation-5: -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).