This is a very good interview question. And the expectation of the interviewer is that you should have a clear understanding of Waterfall and Agile. 

So, the answer is “NO”. Both approaches have their own strengths and weakness, so it all depends on the type of project and its environment. Both have effective planning, execution and controlling.

Below table clearly defines the scenarios, when to use Scrum to achieve better results.

Scrum is not a prescriptive method, but a suggestive approach to software development. So, the way it is implemented makes all the difference.

Then the interviewer may give you one case study and ask you to find which will be the best Methodology.

SITUATION: When there are a lot of issues (Maintenance project or Ticketing project) from the field and the current project team is handling both the things (current project and field issues) which methodology best suits?

The Interviewer is expecting the KNOWLEDGE of Kanban and Scrum both.

So, in my opinion, the answer will be the Scrumban (Scrum+Kanban) approach. Because here requirements are changing so frequently which is hampering the current project and sprint. 

Scrumban is specially DESIGNED for a project that requires frequent maintenance, having unexpected user STORIES and programming errors. Using this approach, the team’s workflow is guided in a way that allows minimum completion time for each user story or programming error.

As in this approach, we will not take up a new task until the high priority task has reached the deployed state.

The below board depicts the above situation.