Convert elements of list to string

how easily can I convert elements of this list to string.If I have output like this:

{{M, 1, 0, 0, 1, 1, 1, 0}, {A, 0, 0, 0}}

And I want something like this:

{{M, 1001110}, {A, 000}}

Or

{{M, "1001110"}, {A, "000"}}