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ADO.NET INTERVIEW QUESTION & ANSWERS

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76. What is a DataTable?
  A DataTable is a class in .NET Framework and in simple words a DataTable object represents a table from a database.
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77. How to generate XML from a dataset and vice versa?
  We can use WriteXml () and ReadXml () methods of DataSet Object.
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78. What are the two main types of classes associated with errors that are thrown by ADO.NET classes?
  Objects of type SqlError and OleDbError arc thrown by the ADO.NET classes.
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79. What method is used by the Command classes to execute SQL statements that return single values?
  The Execute Scalar method executes SQL commands that return single values.
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80. What two classes are used to read data only?
  Use the SqlDataReader and OldDbDataReader classes to read data in a forward direction only.
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