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ADO.NET INTERVIEW QUESTION & ANSWERS

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56. What ADO.NET class is used to ensure consistency between primary and foreign keys in a Dataset?
  The ForeignKeyconstraint class ensures consistency between records in a Dataset.
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57. Which method do you invoke on the DataAdapter control to load your generated dataset with data?
  DataAdapter' fill () method is used to fill load the data in dataset.
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58. What does ADO mean?
  ADO stands for ActiceX Data Objects.It was introduced few years ago as a solution to accessing data that can be found in various forms, not only over a LAN but over the internet. It replaced the data access technologies RDO(Remote Data Objects) and DAO (Data Access Objects).
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59. What is DataAdapter?
  A data adapter represents a set of methods used to perform a two-way data updating mechanism between a disconnected DataTable and the database. It aggregates four commands: select, update, insert and delete command. One adapter can only generate and fill one table in a DataSet.
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60. What are the various methods provided by the dataset object to generate XML?
 
  • ReadXML : Read's a XML document in to Dataset.
  • GetXML : This is a function which returns the string containing XML document.
  • WriteXML : This writes a XML data to disk.
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