A. Batch system
B. Quick response system
C. Real time system
D. Time sharing system
An operating system that reads and reacts in real-time is referred to as a real-time operating system (RTOS). Real-time operating systems are designed to provide predictable and deterministic responses to events within specific time constraints. These systems are crucial in applications where timing and responsiveness are critical, such as in embedded systems, control systems, robotics, and other time-sensitive applications.