What is running a program — CCA-F Exam Prep

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MYSTERYA Wall Street trading floor in chaos. Screens showing stock prices plummeting. Traders on phones, panicked faces. A single server rack in the background with a green 'RUNNING' light. Time stamp reads 9:31 AM. Dark, urgent atmosphere.

August 1, 2012. 9:31 AM. Knight Capital's servers start buying stocks nobody asked for.

Old test code, never deleted, had been sitting dormant on a server for years. A technician deployed new software but forgot to update one of eight servers. The deployment flag woke the old code up. In 45 minutes, it bought $7 billion in unwanted stocks and destroyed the company.