1.Candidate and Super Key in SQL Server. 2.Difference in join and sub query. 3. How to achieve abstraction , Write the example. 4. can we write Static Function and constructor in Abstract class.

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Answers to SQL Server and OOP related questions for Senior Developer position.
Candidate key is a unique identifier for a row in a table, while super key is a set of columns that can uniquely identify ...read more
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