Exam 70-483 topic 1 question 39 discussion

You are adding a public method named UpdateGrade to a public class named ReportCard.
The code region that updates the grade field must meet the following requirements:
✑ It must be accessed by only one thread at a time.
✑ It must not be vulnerable to a deadlock situation.
You need to implement the UpdateGrade() method.
What should you do?