Impediments are the obstacles or issues faced by the scrum team which slows down their speed of work. If something is trying to block the scrum team from their getting work “Done” then it is an impediment. Impediments can come in any form. Some of the impediments are given as
Resource missing or sick team member
Technical, operational, organizational problems
Lack of management supportive system
External issues such as weather, war, etc
Lack of skill or knowledge
While answering impediments related agile scrum interview questions remember that you may be asked the way to remove any of the mentioned impediment.