What level of technical literacy should a project manager have?

But such a glossary would be very useful. I remember that at one time I really missed him. And I see how less experienced colleagues still lack it today.

And as a result

I would like to ask dear Habrausers: what do you think about all this? What kind of technical background should a project manager have if he is faced with development projects?

Options:

None. A manager can do without technical knowledge provided that the software is developed.

A basic level of. Let's say that we consider the basic level to be the level at which the PM knows the basic concepts, understands how one tool differs from another, and knows how to correctly formulate questions to the developer.

Advanced level. Either the PM has a specialized education, or during his work he independently immersed himself in development. And now he can talk on equal terms with the developer and defend solutions to the client without preliminary discussions with the team. In the sense that he himself can choose the arguments.

Special thanks for the comments: it is always interesting to read the opinions of developers and managers on this issue.