1) Is it possible to partially implement an interface? Justify your answer with a Java example.

2) Discuss whether the following UserSettingService class violates the Single Responsibility principle or not? If yes, suggest a solution.

public class UserSettingService

{

public void changeEmail(User user)

{

if(checkAccess(user))

{

//Grant option to change

}

}

public boolean checkAccess(User user)

{

//Verify if the user is valid.

}

}

3) Briefly describe Scrum Sprint and Burndown chart with respect to the Scrum methodology. How can we use scrum for the large scale software system?