This is a question which comes up in all job interviews. Do not answer with a cliché response like “I work too hard” or “I’m a perfectionist”.
The best way to answer this is to select a weakness which isn’t a critical skill necessary for the job and then counter act it with a positive step you’ve taken to solve the problem.
An ideal answer for project management role is as follows:
In the past I used to struggle slightly with public speaking. A few years ago I went on an acting course where I built my self confidence. At my last workplace I did several presentations and no longer felt nervous and received lots positive feedback from colleagues and management.