Question

What does mysql_real_connect() return if it fails?

(a) integer

(b) float

(c) structure

(d) NULL

The question was asked in class test.

This intriguing question comes from Handling Errors and Processing Command Options topic in portion MySQL Programs Using C of MySQL

Answer 1

The correct answer is (d) NULL

The explanation is: The function ‘mysql_real_connect()’ must complete successfully before any other API functions that require a valid MYSQL connection handler structure can be executed. It returns NULL on failure.