VISUAL BASIC

Detailed explanation-1: -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.

Detailed explanation-2: -Logical DFD vs. Physical DFD A Logical DFD visualizes the data flow that is essential for a business to operate. It focuses on the business and the information needed, not on how the system works or is proposed to work. However, a Physical DFD shows how the system is actually implemented now, or how it will be.

Detailed explanation-3: -What’s the difference between a logical DFD and a physical DFD? A logical DFD focuses on the business and business activities, while a physical DFD looks at how a system is implemented.

Detailed explanation-4: -Condition – It is represented by small diamond at the base of module. It depicts that control module can select any of sub-routine based on some condition.

Detailed explanation-5: -Logical Data Flow Diagram A logical DFD is a model of how a business operates, and the processes it depicts represent business activities. The logical DFD shows points where data is collected regardless of the type of storage used.

Detailed explanation-6: -Which of the following is not a component in DFD? Explanation: Attributes is not a component in DFD.