C is a general-purpose high level language that was originally developed by Dennis Ritchie for the Unix operating system. It was first implemented on the Digital Eqquipment Corporation PDP-11 computer in 1972.The Unix operating system and virtually all Unix applications are written in the C language.
Java is a multi-platform, object-oriented, and network-centric language that can be used as a platform in itself. t is a fast, secure, reliable programming language or coding everything from mobile apps and enterprise software to big data applications and server-side technologies.
Structured query language (SQL) is a programming language for storing and processing information in a relational database. A relational database stores information in tabular form, with rows and columns representing different data attributes and the various relationships between the data values.