Industry Interviews in .NET

Integrate qrcode in .NET Industry Interviews

A secondary table that relates to a primary table uses a foreign key to point to the primary table s primary key. Referential integrity (RI) refers to the fact that the references have integrity, meaning that every foreign key points to a valid primary key. Referential integrity is vital to the consistency of the database. The database must begin and end every transaction in a consistent state. This consistency must extend to the foreign-key references.

Proof If maxi IsiI does not converge to 0, then d either does not have a limiting distribution at all, or, if it has, the limiting distribution can be written as a convolution of two parts one of which is F (apart from a scale factor); hence it cannot be normal [see, e.g., Feller (1966), p. 4981. If y = maxi IsiI 0, then we can easily check Lindeberg's condition:

The registry is probably one of the easiest things to restore after you have recovered from a server failure. A full backup of a server always includes registry information. Because incremental backups look at all changed les, the registry is backed up then, too. If your registry does not appear to have changed since the last backup, something is de nitely wrong the registry is constantly changing, regardless of anything actually happening on the server.