The given statement exists true. Ntering a system call concerns varying from kernel mode to user mode.
A processor in a computer operating Windows contains two various modes: user mode and kernel mode. The processor switches between the two modes relying on what kind of code exists operating on the processor. Applications run in the user way, and core operating system features run in kernel mode.
The transition from the user mode to kernel mode happens, when the application demands the service of the operating system or an interrupts or a system call happens. The mode bit exists set to 1 in the user mode. When a program requires any hardware resources, it must create a call to the kernel.
Therefore, the correct answer is option a. true.
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