DataSets and DataAdapters:-

1)Difference between DataSets and DataAdapters?

Datasets store a copy of data from the database tables. However, Datasets can not directly retrieve data from Databases.
DataAdapters are used to link Databases with DataSets.DataSets and DataAdapters are used to display and manipulate data from databases


2)What is DataSet?
A Dataset is a in memory representation of a collection of Database objects including tables of a relational database scheme.
The dataset contains a collection of Tables, Relations, constraints etc.,