Interview Questions

Constructor is not a special method.

Constructor is block of code that is executed automatically whenever object of the class is created.

Insurance can help you to protect your properties and assets like home, car, stocks,... against unexpected accidents.

Example:

“I have no problems with change. I am sure in my ability to regulate my actions of behaviors as needed, and take up myself adaptable to all situations – not just change.”

SQL statement gets executed when we open cursor

First we need to create an instance of a JDBC driver or load JDBC drivers, then we need to register this driver with DriverManager class. Then we can open a connection. By using this connection , we can create a statement object and this object will help us to execute the query.

- Because of the block nature, multiple statements are processed at once thereby improving performance. 

- PL/SQL handles exceptions on catching which, action can be taken. 

- PL/SQL is highly portable as it works with all procedural languages and is highly secured because of privileges.

By using overloading we can add new functionality to the sub class.

The garbage collector assumes that all objects in the managed heap are garbage. It starts walking the roots and builds a graph of all objects reachable from the roots recursively. It stops when it attempts to add an object to the graph that it previously added. The graph contains the set of all objects that are reachable from the application's roots. Any object/s that is not in the graph is not accessible by the application, and is considered garbage. Collection only occurs when the heap is full. In such a case, each and every garbage object calls the Finalize method and reclaims the unused memory