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ASP.NET INTERVIEW QUESTION & ANSWERS

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126. What is the use of diffgram?
  DiffGram is an XML format that is used to identify current and original versions of data elements. The DataSet uses the DiffGram format to load and persist its contents, and to serialize its contents for transport across a network connection. When a DataSet is written as a DiffGram, it populates the DiffGram with all the necessary information to accurately recreate the contents, though not the schema, of the DataSet, including column values from both the Original and Current row versions, row error information and row order.
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127. Do user controls support custom properties?
  Yes. User controls support custom properties. To use them, declare public methods within the user control to allow access to a property.
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128. What are trace switches?
  Trace switches helps us to control and govern the tracing behavior of a project.
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129. Which config file has all the supported channels/protocols?
  Machine.Config
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130. What are the different types of Caching?
  There are three types of Caching :
  • Output Caching : stores the responses from an asp.net page.
  • Fragment Caching : Only caches/stores the portion of page (User Control)
  • Data Caching : is Programmatic way to Cache objects for performance.
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