science and technology

1. What is java? Java is a OOP based computer programming language.  2. Explain, what is the difference between private, protected, and public in java? These java keywords are for following privileges to component such as variables and methods. Public: All classes can be access Private: Can be access only the class to which belongs Protected: Can be access to the class to which they belongs and any subclasses. 3. What are access specifiers in java? Access specifiers are keywords that determine the type of access to the member of a class.  There are four types of specifiers in java (a) Public, (b) Private, (c) Protected, and (d) Defaults. 4. What's the difference between normal methods and constructors? Constructors cannot return a value and must have the same name as the class. Constructors are only called once while normal methods could be called many times and it can return a value or can be void (it is your choice).  5. It is possible to call on

What is a database It is a coherent collection of data with some inherent meaning, built and populated with data for a specific purpose. A database stores data that is useful to us. This data is only a part of the entire data available in the world around us. To be able to successfully design and maintain database we have to do the following: Ø   Identify which part of the word’s data is of interest to us. Ø   Identify what specific objects in that part of the word’s data are of interest to us. Ø   Identify a relationship between the objects.   Software houses took up the challenge of designing a system that would help users in managing data in a database. These systems were called Database Management Systems (DBMS). Some of the DBMS developed by software houses were Oracle, Ingress, Sybase, etc. Let us look at Oracle as a Database Management System (DBMS). Introduction to Oracle and Its Tools: The Oracle product is primarily divided into   Oracle s