Answer:
It is not a condition precedent.
Explanation:
A condition precedent is an event that must take place by one part before the other part could and must perform its task.
If the condition precedent does not occur is like no contract was signed and there is no right to request for payment or service.
In the example given Michael had already been working for a year by the time the Bar exam will be taken. That is not how a condition precedent works. For that to be a condition precedent it would be that if Michael passes the Bar exam then he would start working at the law firm.
I hope this answer helps you.