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Top 10 Advance Java Interview questions?

Top 10 Advance Java Interview questions?   What are the differences between abstract classes and interfaces in Java? What is the difference between ArrayList and LinkedList in Java? What is the purpose of the finalize() method in Java? What is polymorphism in Java and how is it achieved? What are the different types of inner classes in Java? What is the difference between static and non-static methods in Java? What are the different types of exceptions in Java and how do they differ? What is the difference between checked and unchecked exceptions in Java? How does Java handle multithreading and synchronization? What are the different types of JDBC drivers in Java and how do they differ?
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What is SQL?

 

What is SQL?

SQL is a language that is used to operate your database. SQL is the basic language used for all databases. There are minor syntax changes amongst different databases, but the basic SQL syntax remains largely the same. SQL is a short abbreviation of Structured Query Language. According to ANSI (American National Standards Institute), SQL is the standard language to operate a relational database management system.

SQL is used in the accessing, updating, and manipulation of data in a database. Its design allows for the management of data in an RDBMS, such as MYSQL. SQL language is also used for controlling data access and for the creation and modification of database schemas.

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