46. Which operating system component schedules when each application runs?
Answer: B
The kernel is the operating system component that schedules when each application runs.
The kernel manages system resources and is responsible for scheduling the execution of applications, ensuring that each process receives appropriate CPU time.
A) File manager
The file manager is responsible for managing files on the system, including their storage, retrieval, and organization. It does not handle scheduling of applications; therefore, it is not the correct answer.
B) Kernel
The kernel is the core component of the operating system that directly interacts with hardware and manages system resources, including the scheduling of application processes. It ensures that multiple applications can run simultaneously by allocating CPU time to each process as needed.
C) Driver
Drivers are specific software components that allow the operating system to communicate with hardware devices. While they are essential for hardware functionality, they do not manage application scheduling, making this option incorrect.
D) User interface
The user interface provides the means for users to interact with the operating system and applications, but it does not play a role in scheduling processes. Therefore, it cannot be the correct answer to the question.
Conclusion
The kernel is definitively the correct answer as it is responsible for scheduling application execution in the operating system. The other options, including the file manager, driver, and user interface, perform different functions unrelated to the scheduling of running applications. Thus, they do not fulfill the requirements of the question.