CareerCup

My guess.. Allow me to be creative! Could we use it to enforce security? We design a system such that if certain sequence of operations are performed, there occurs a deadlock and the entities involved in the deadlock are terminated.

Suppose a computer has three CD drives and three processes. Each of the three processes holds one of the drives. If each process now requests another drive, the three processes will be in a deadlock. Each process will be waiting for the "CD drive released" event, which can be only caused by one of the other waiting processes.

we can use a deadlock where it's negative effects are far less than it's positive effects. Like
If i start my car in the morning, My smart car monitoring system can stumble into deadlock and just wont let me start. Deadlock reasons should be seriously good.
Please provide better example

Dead lock are very common. When Its costly to remove deadlock then to let it occur.
We can use deadlock.

I guess even this one could also be a scenario.
Suppose if i start my car using my authentic key, it should start and move on.
Else if someone else start using the illegal key, then it should enter deadlock state, so that car should not start or , if started should fail to move forward.

You should "use" deadlocks when writing automated testing code for a component that has deadlock prevention, to make sure that the prevention mechanism works

I think this would be a good answer to such a question in the interview:

If you hate your manager, you can write a complex code that will cause deadlocks.
This will be your revenge.