shell is a computer program which exposes an operating system's services to a human user or other program. Services relating to file system management is such a key service provided by the shell to users. With your knowledge in file systems write a C++ or java programs the ca be used to: i. ii. iii. Create a file Move a file to another directory Rename a file in a director

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Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.