Focus on keeping your answer brief while letting the interviewer know that you have researched this question. The interviewer wants to see that you understand the difference between who heads the FBI and who monitors and oversees them.

Since there is a difference between who heads the FBI and who monitors and oversees them, you should avoid saying the Director of the FBI is the one who does the monitoring. This is one of those questions answered on the FBI's website under Frequently Asked Questions, which you should thoroughly review before your interview.

Remember to mention that various entities monitor and oversee the FBI and briefly describe the function of each entity. For example, Congress has several oversight committees that monitor budget appropriations, programs, and some select investigations, while the Director of National Intelligence oversees the FBI's intelligence activities.

"The Director of National Intelligence oversees intelligence activities, and the Attorney General oversees and monitors the FBI within the United States Department of Justice."

"The FBI is monitored and scrutinized by various entities, each with different functions. The Attorney General oversees and monitors the FBI within the U.S. Department of Justice. The Director of National Intelligence oversees any intelligence activities conducted by the bureau. The House and Senate, making up Congress, using several oversight committees, oversee budget appropriations, select investigations, and special programs, which are then under judicial review."