What is the default port used by JProbe?
A
Correct answer
Explanation
JProbe uses port 52991 by default for communication between the profiler console and the profiled application. This port allows JProbe to attach to the JVM and collect profiling data in real-time. The other ports listed (52990, 52992, 52993) are incorrect default values, though JProbe may allow configuring a different port if the default is already in use or blocked by a firewall.