Exam 10: Management of Network Functions

For each node in a DO/S,the Memory Manager uses a kernel with a ____ algorithm to track the amount of memory that is available.

A process-based DO/S must synchronize actions across the network.When a process reaches a point at which it needs service from an external source,such as an I/O request,it sends a message searching for the service.While it waits for a response,the processor server puts the process in a ____ state.

The Process Manager has responsibility for the following tasks: creating objects,dispatching objects,scheduling objects,synchronizing operations on objects,communicating among objects,and deleting objects.

Location transparency,the essence of cloud computing,is provided by mechanisms and directories that map logical data items to physical locations so that users don't need to be concerned with the physical locations of their files.

Each kernel is operated by the application software which,in turn,is directed by the kernel running on the host computer.

An object-based DO/S provides process management through the use of client/server processes synchronized and linked together through messages and ports,also known as channels or pipes.

In a distributed system,there is a high level of cooperation and sharing of actions and data maintained by the sites when determining which process should be loaded and where it should be run;this is accomplished by ____.

One advantage of process-based DO/S is that the processes can be assembled to communicate and synchronize with each other to provide a distributed network of resources,with each process knowing the location of its distributed peers.

A DO/S must keep a global accounting of each network device and its availability,maintain each device's status record and control block,and distribute this information to all sites.

In a network operating system (NOS),the network management functions come into play only when the system needs to use the network.At all other times,the operating system operates as if it's a(n)____.

DO/S was developed before NOS.

A distributed operating system does not need to deal with the possibility of deadlock caused by circular waits.

A job scheduler based on process priorities and durations is an example of ____.

If a process requests access to a region in memory,the process manager determines whether the requesting process has been previously granted rights.

In response to the Write command,the File Manager sends a command to the remote server to unlock the specified file.

In a network,the Processor Manager provides the policies and mechanisms to create,delete,abort,name,rename,find,schedule,block,run,and synchronize processes.

When an application tries to access a page that is not in memory,a ____ occurs and the Memory Manager automatically brings that page into memory.

Execute-only access allows users to read the page;however,they are not allowed to modify it.

To control demands on memory in a DO/S,the Memory Manager handles requests from the Process Manager to allocate and deallocate space based on ____.

The biggest limitation of a network operating system (NOS)is ____ in terms of memory,process,device,and file management.