Q. What are the advantages and disadvantages of using same system call interface for manipulating both files and devices?
Using the same system calls in order to manipulate both files and devices would result in the devices being accessed as a file in the file system. The advantages would be that the user program code would be the same used to access both files and devices only the parameters would change.
Q. What is the purpose of the command interpreter why is it usually separate from the kernel quizlet?
What is the purpose of the command interpreter? Why is it usually separate from the kernel? and executes them, usually by turning them into one or more system calls. It is usually not part of the kernel since the command interpreter is subject to changes.
Q. What is device manipulation in system call?
Device Management These system calls are responsible for device manipulation such as reading from device buffers, writing into device buffers etc.
Q. What is the purpose of system calls what system calls have to be executed by a command interpreter or shell in order to start a new process on a Unix system?
2.6 What system calls have to be executed by a command interpreter or shell in order to start a new process? Answer: In Unix systems, a fork system call followed by an exec system call need to be performed to start a new process.
Q. What are the advantages of using loadable kernel modules?
Loadable kernel modules have several advantages over monolithic “blobs” of code in the kernel: * Device drivers don’t have to be hard-coded into the kernel. For example, if a new chip-set comes out that powers many webcams, that kernel module can simply be loaded instead of recompiling the kernel with the new module.
Q. What is the purpose of command interpreter system in operating system?
Answer: A command interpreter is the part of a computer operating system that understands and executes commands that are entered interactively by a human being or from a program.
Q. What is the role of system call interface in system calls?
In computing, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on. It provides an interface between a process and operating system to allow user-level processes to request services of the operating system.
Q. What is the purpose of system calls and how do system calls relate to OS and to the concept of dual mode kernel mode user mode )?
System call provides the services of the operating system to the user programs via Application Program Interface(API). It provides an interface between a process and operating system to allow user-level processes to request services of the operating system. System calls are the only entry points into the kernel system.
Q. What is the main advantage of the layered approach to system design what are the disadvantages of using the layered approach?
With the layered approach, the bottom layer is the hardware, while the highest layer is the user interface. The main advantage is simplicity of construction and debugging. The main difficulty is defining the various layers. The main disadvantage is that the OS tends to be less efficient than other implementations.
