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What is class in DBMS?
class in dbms is nothing but a collection of attributes.... class in java is defined as collection of objects....:D
What is the class hierarchy in dbms?
In a relational database management system (RDBMS), the class hierarchy typically includes the following levels: database server, databases, tables (or relations), columns (or attributes), and rows (or tuples). The database server manages connections, access control, and query processing. Databases contain tables, which store data arranged in rows and columns. Columns define the attributes, while rows represent individual records.
How many super keys are possible in DBMS having m attributes?
In dbms with m attributes 2^m-1 keys are possible. BY-ROHIT
How do you invoke an overwritten super class from the sub class?
super
What are highlights of DBMS?
NA_ what are highlights of advanced DBMS what are highlights of advanced DBMS what are highlights of advanced DBMS
Is java DBMS?
no, Java is not dbms.. Java is a programming language Dbms is database
Is inheritence in java only based on super class and sub class?
Yes. Inheritance is achieved by using the super class and sub class concept
Is SQL DBMS or RDBMS?
dbms
How is a constructor in the super class called?
By using the reference super(); When you invoke super(); the JVM knows that you are trying to invoke the constructor from the parent class and calls the super class constructor automatically. In fact, the invocation to super(); is usually the first line of any class constructor. This is done to ensure that all the parent class objects are initialized before the current child class is created.
What are three types of dbms?
Three types of DBMS (Database Management Systems) include relational DBMS, object-oriented DBMS, and NoSQL DBMS. Relational DBMS organizes data into tables with rows and columns, object-oriented DBMS stores data as objects and classes, and NoSQL DBMS handles unstructured and semi-structured data with flexible schemas.
What is object class in java?
object class is a super class for all other class...
How can you access the super class variables with out any object creation?
Variables of the super class can be accessed using the super keyword. Here is an example. class A { int a; } class B extends A { int a; public B() { super.a = 5; } }
