Which one of the following is a real time operating system?

a) Windows CE
b) RTLinux
c) VxWorks
d) All of the mentioned

All of the mentioned

All of the options listed – Windows CE, RTLinux, and VxWorks – are considered real-time operating systems (RTOS). Each is designed to handle time-critical tasks with strict deadlines, making them suitable for applications like industrial control, robotics, and aerospace.

• Windows CE: A versatile RTOS developed by Microsoft for embedded systems.  
• RTLinux: A real-time extension for the Linux kernel.  
• VxWorks: A widely used commercial RTOS known for its reliability and performance.