Yes, proctored exams can detect two monitors. Modern remote proctoring software is specifically designed to identify multiple active displays, which it treats as a potential security breach. The direct answer to can proctored exams detect two monitors is a definitive yes, as they utilize several methods to monitor your hardware setup.

These systems typically employ:

System Hardware Scans: The software inventories your connected devices during launch, identifying all active monitors and graphics adapters.
Screen Recording and Analysis: The proctoring service records your entire desktop. This makes any secondary screen visibly apparent to a human proctor or an AI reviewing the session.
Browser and Display Settings Checks: Many services lock your browser to a single screen and can detect attempts to move the exam window to another display.

Therefore, you must assume that proctored exams can detect two monitors. The only assured way to comply with testing protocols is to physically disconnect any secondary monitor before starting the exam. Relying on the system to miss an extra display is a significant risk, as a violation flagged from this detection can result in a failed exam or academic penalty.