• create the engineer class

• implent the interface

• override the methods

Highlights:
=> Good, simplified video presentation.
=> Good use-cases and features implementations.
=> Good use of classes and OOPS concepts like access modifiers, polymorphism etc.
=> Good code directory structure.

Things need to be improved:
=> Always have a good readme file.
=> Try to deploy the project for user ease.
=> No such PR on the GitHub repo.
=> Try to use design patters like factory/singleton/observer etc. as per use cases.
=> Always use code formatter that will help you to maintained proper structure of your code and code will be more readable and beautiful.
=> You should thing more about security, like we should save the passwords in encrypted format and validate the decrypt the passwords using some authentication mechanism (AAD, Token based) while accessing the passwords.
=> Always write headers in each file like author name, date and so on.
=> Try to add comments as much as possible.
=> Don't use any hard-coded values in your code, always use come config file for those configurations like URL etc. to avoid recompiling of libs when anything is changes.
=> You should use some loggers as-well.
=> You should work on naming conventions.

• create all the queries

• create the employee interface

• write all the methods

• create the employee class

• wirte the qurey class for hod

• create all the query for the methods

• complete the whole hod part

• defining the connection class in util package

• create the class

• write the logic for the connection

• [ ]

• connect to the data base

• create the engineer's interface

• write all the methods in interface

• complete the interface

• create the engineer's interface

• write all the methods in interface

• complete the interface