Question: Which of the following is the first component of the DFD?
A Data Flow
B External Entity
C Process
D Data Store
Answer: External Entity
| Component of DFD | Symbol | Description |
| External Entity | Rectangle | Represents an external system or entity that interacts with the main system. |
| Process | Circle/Oval/Rectangle | Represents a function or operation that transforms input data into output data. |
| Data Flow | Arrow | Represents the path that data takes within the system, showing the flow of data between components. |
| Data Store | Parallel Lines | Represents the location of files or repositories where data is stored or retrieved. |