DMCT-NOTES/unit 1/05_Data_Processing_Methods.md

Data Processing Methods

How is data actually processed by computers?

1. Batch Processing

• Data is collected over time and processed all at once (in a batch).
• Example: Payroll systems (calculating salaries at the end of the month).
• Pros: Efficient for large volumes.
• Cons: Not immediate.

2. Real-time Processing

• Data is processed immediately as it comes in.
• Example: ATM withdrawals. You need to know your balance right now.
• Pros: Instant results.
• Cons: Complex and expensive.

3. Online Processing

• Similar to real-time, often used for internet applications.
• Example: Barcode scanning at a store checkout. The price is fetched instantly.

4. Distributed Processing

• Breaking a task into pieces and running them on multiple computers at the same time.
• Example: Google Search. Many servers work together to find your result.