public ExamController(IExamDal examDal, IUserDal userDal, ITestDal testDal)
{
_examDal = examDal;
_userDal = userDal;
_testDal = testDal;
}
public ExamManager(IExamDal examDal)
{
_examDal = examDal;
}
public ExamService(IExamDal examDal)
{
_examDal = examDal;
}