Level 1 DFD - Break down your context diagram into major processes:
User Management (login, registration, authentication)
Content Management (questions, exams, results)
Examination Process (take exam, submit answers)
Reporting/Analytics (generate reports, view results)
Level 2 DFD - Decompose Each Process Take one Level 1 process and break it further:
Example: "Examination Process" becomes:
Validate student eligibility
Display questions
Capture answers
Calculate scores
Store results
Practical Exam Strategy When stuck, use this template:
Input processes (what comes into the system)
Processing/Business logic (what the system does)
Output processes (what goes out)
Storage interactions (read/write to data stores)
Quick DFD Rules Each process needs inputs and outputs
Data flows between processes, not between external entities
Every data store should be accessed by at least one process
Number processes: 1.0, 2.0, 3.0 (Level 1), then 1.1, 1.2, 1.3 (Level 2)