Jurisearch Services Programmer Interview Questions and Answers

An interface is a blueprint of a class that defines a set of methods without implementation.

• An interface can be implemented by multiple classes.

• All methods in an interface are public and abstract by default.

• Interfaces can also contain constants and default methods.

• Example: interface Shape { void draw(); }

• Example: interface Animal { void eat(); void sleep(); }

Truncate removes all data from a table while delete removes specific rows.

• Truncate is faster than delete as it doesn't log individual row deletions

• Truncate cannot be rolled back while delete can be

• Truncate resets the identity of the table while delete doesn't

• Truncate doesn't fire triggers while delete does

• Truncate is a DDL command while delete is a DML command