Which interrogative sentence is correct?

[bit3034]

What are the problems in my written English?
or
What are the problems in my writings in English?

 

[bhaisahab]

What are the problems in my written English?
or
What are the problems in my writings in English?

The first one is correct.

 

[billmcd]

What are the problems in my written English?
or
What are the problems in my writings in English?

#1 suggests a reference to informal, academic or everyday writing.
#2 suggests that the "writings" are more formal and perhaps published.
So, it depends on the type to which you refer.