What is the leading role of a scrum master?

• Scrum Master is accountable to coach the Development Team and The Product Owner so that they can work on the day to day activities. Scrum Master acts as a communicator between the product owner and the development team.
• Scrum Master makes sure that the team understands the Scrum principles and values and also team practices them.
• Scrum Master supports the team in a way that they become self-organized
• Scrum Master protects the unit from any interference from the outside so that there is no distraction

This is one of the most asked agile scrum master interview questions