Technology Questions

- B2B (Business-to-Business)   :

In B2B, companies transact with each other. This includes the companies selling their product to wholesalers, distributors, etc

- B2C (Business-to-Consumer) :

This is usually when average businesses transact with the customer. This is done through the shopping cart softwares and the amount involved in the transactions is usually low.

- C2B (Consumer-to-Business) :

In this, a consumer places the product on the net. The companies willing to buy this product bid for it. The comsumer can then decide, depending upon the bid, which company to sell it to. 

- C2C (Consumer-to-Consumer):

These kind of transactions are usually done at an individual level. Payments can be done with the help of online systems like PayPal.

Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.

Batch DL/I

MPP Mode - (Message Processing Program)

BMP Mode - (Batch Message Processing)

BRD - Business Requirement document is consist of functional Business Requirements, Gap Analysis (between current and future scenarios), In scope and Out of scope of the project, Business rules, Assumptions, Risk etc.

SRS - Source Requirement Specification is consist of Use cases, Use Case Scenarios, Activity flow diagram, Non functional Business Requirements.

Use cases - are the pictorial representation of user centric view of the system.

In order to use any object as Key in HashMap, it must implements equals and hashcode method in Java.