Operating System Security Measures

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What is the purpose of the OS protection boundary?

To limit the number of processes that can run concurrently

To enhance the speed of file operations

To restrict user applications from accessing privileged resources (correct)

To prevent the CPU from executing system calls

In what mode does the CPU execute when the Privileged Mode bit is set to 0?

User mode (correct)

Exception mode

Interrupt mode

Kernel mode

What action is taken when an application makes a system call?

The kernel checks if the caller has permission for the requested operation (correct)

The system call is delayed for future execution

CPU executes the system call directly

The application is terminated immediately

Which component is responsible for handling system calls in the OS?

CPU Signup and view all the answers

What stage does the CPU enter after executing a system call and returning from it?

Privileged Mode Signup and view all the answers

What is the purpose of the instruction trap in an operating system?

To handle errors and exceptions in instruction execution Signup and view all the answers

Which component is responsible for managing memory allocation in an operating system?

Main Memory Signup and view all the answers

What happens when an interrupt occurs during CPU execution?

The CPU pauses its current task to process the interrupt Signup and view all the answers

Which component assists in transferring control to an appropriate exception handler when an exception occurs?

Interrupt Dispatch Table Signup and view all the answers

What role does the OS protection boundary play in ensuring system stability?

It improves security by protecting memory regions. Signup and view all the answers

Operating System Security Measures

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Questions and Answers

What is the purpose of the OS protection boundary?

In what mode does the CPU execute when the Privileged Mode bit is set to 0?

What action is taken when an application makes a system call?

Which component is responsible for handling system calls in the OS?

What stage does the CPU enter after executing a system call and returning from it?

What is the purpose of the instruction trap in an operating system?

Which component is responsible for managing memory allocation in an operating system?

What happens when an interrupt occurs during CPU execution?

Which component assists in transferring control to an appropriate exception handler when an exception occurs?

What role does the OS protection boundary play in ensuring system stability?

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