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Operating System: Virtual Machine and Kernel Mode Quiz

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Questions and Answers

What is the main advantage of the OS in terms of programming?

It provides a new combination of hardware, machine language, and OS known as a virtual machine (correct)
It simplifies the process of CPU Scheduling algorithms
It allows for easier access to user mode instructions
It directly controls the primary memory allocation

What is the primary responsibility of the OS when it acts as a Resource Manager during parallel accessing?

To schedule and terminate processes
To allocate and deallocate memory space
To provide hardware to users (correct)
To manage CPU Scheduling algorithms

How does the user mode of the microprocessor differ from the kernel mode?

User mode allows all hardware instructions, while kernel mode restricts some (correct)
Kernel mode decreases the load in the system, unlike user mode
Kernel mode has a lower priority compared to user mode
User mode is used by the OS, while kernel mode is used by application programs

In memory management, what is the role of the operating system?

The OS decides which process needs memory space and how much (A) Signup and view all the answers

Which term refers to the mechanism used for storage management by the operating system?

NFS (D) Signup and view all the answers

What is the primary purpose of using passwords in an operating system?

To prevent unauthorized access to programs and data (B) Signup and view all the answers

Which of the following is true about the ENIAC computer?

It contained over 18,000 vacuum tubes and was cooled by air blowers (B) Signup and view all the answers

What is the primary advantage of multiprogramming in operating systems?

It prevents CPU time from being wasted by executing another process when one is waiting for I/O (A) Signup and view all the answers

What is the primary difference between tightly-coupled and loosely-coupled multiprocessor systems?

Tightly-coupled systems share memory, while loosely-coupled systems have separate memory for each processor (C) Signup and view all the answers

Which of the following statements about the history of operating systems is true?

The first computer programs were loaded into memory using punched cards and paper tapes (D) Signup and view all the answers

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