IPC Messages

The processes can communicate with each other by means of IPC Messages. In fact, each message generated by a process is sent to an IPC message queue. It stays in this queue until the other process reads it. The message queue is implemented by means of a linked list. A message is consists of the […]

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Relational Algebra

Query languages A query language is a language where users access or modify data in a database. There are two kinds of query languages: procedural and non-procedural. If the user makes the instructions to perform the sequence of operations on the database to compute the result, this query is procedural. If the user describes the […]

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