ADO.NET

Which method do you invoke on the DataAdapter control to load your generated dataset with data?

You have to use the Fill method of the DataAdapter control and pass the dataset object as an argument to load the generated data.

Can you edit data in the Repeater control?
NO.

Which are the different IsolationLevels ?

Following are the various IsolationLevels:
• Serialized Data read by a current transaction cannot be changed by another transaction until the current transaction finishes. No new data can be inserted that would affect the current transaction. This is the safest isolation level and is the default.
• Repeatable Read Data read by a current transaction cannot be changed by another transaction until the current transaction finishes. Any type of new data can be inserted during a transaction.
• Read Committed A transaction cannot read data that is being modified by another transaction that has not committed. This is the default isolation level in Microsoft® SQL Server.
• Read Uncommitted A transaction can read any data, even if it is being modified by another transaction. This is the least safe isolation level but allows the highest concurrency.
• Any Any isolation level is supported. This setting is most commonly used by downstream components to avoid conflicts. This setting is useful because any downstream component must be configured with an isolation level that is equal to or less than the isolation level of its immediate upstream component. Therefore, a downstream component that has its isolation level configured as Any always uses the same isolation level that its immediate upstream component uses. If the root object in a transaction has its isolation level configured to Any, its isolation level becomes Serialized.

How xml files and be read and write using dataset?.
DataSet exposes method like ReadXml and WriteXml to read and write xml

What are the different rowversions available?

There are four types of Rowversions.

Current:
The current values for the row. This row version does not exist for rows with a RowState of Deleted.

Default :
The row the default version for the current DataRowState. For a DataRowState value of Added, Modified or Current, the default version is Current. For a DataRowState of Deleted, the version is Original. For a DataRowState value of Detached, the version is Proposed.

Original:
The row contains its original values.

Proposed:
The proposed values for the row. This row version exists during an edit operation on a row, or for a row that is not part of a DataRowCollection