JDBC Interview Q

• What is JDBC?

JDBC is an API(Application Programming Interface) used to develop a java program that communicates with any DataBase server without changing the code.

• Can we use C program to communicate with Database?

Yes, we can use C program to communicate with database, but it is able to communicate with only one database.

Core Java Interview Q

• What is JVM? 

 JVM(Java Virtual Machine) is a program whose responsible is to take the .class file and convert the byte code instructions into machine code, and then make it executed by the processor.

• What is a class loader?

Part of JVM which loads the .class file into JVM's memory. 

• Where does the memory is allocated to the class?

when we run a java program class is stored in a runtime memory area called Method Area.