Interview Hack#44 Answer

 Which of the following is correct about err used in the declaration given below?

1. It is a typedef for enum error.
2. It is a variable of type enum error.
3. The statement is erroneous.
4. It is a structure. 
5. None Of these

Correct answer 1)It is a typedef for enum error.

Explanation:

A typedef gives a new name to an existing data type.
To err is a new name for enum error.