Deck 10: Management of Network Functions

Question 1

All devices are controlled by a global device manager under a DO/S.

Answer 1

False

Question 2

Most networks are homogeneous;that is,they support computers running a wide variety of operating systems.

Answer 2

False

Question 3

Under a DO/S,resources are allocated based on negotiation and compromise among equally important peer sites in the distributed system.

Answer 3

True

Question 4

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.

Question 5

The find-and-copy technique isn't considered true file sharing because all users wanting access to the data file must copy the file onto their own systems,thereby duplicating the code and wasting space.

Question 6

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.

Question 7

The arbitration rule of a system scheduling function is a policy that is used to resolve conflicts between jobs of different priorities.

Question 8

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

Question 9

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.

Question 10

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.

Question 11

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

Question 12

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

Question 13

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

Question 14

To globally manage the network's entire suite of resources,a DO/S is typically constructed with a replicated kernel operating system.

Question 15

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.

Question 16

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

Question 17

Data redundancy can make files much faster and easier to read.

Question 18

DO/S was developed before NOS.

Question 19

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

Question 20

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.

Question 21

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 ____.

A) exchanging messages among site operating systems
B) managing all communication within a central controller
C) communication among dispatchers at the sites
D) sending requests directly to queues

Question 22

In a network operating system (NOS),____.

A) access control policies are globally managed
B) local resources are managed globally
C) resources are owned by local nodes
D) local operations at a node are managed by the NOS

Question 23

In an object-based DO/S,if the local device manager cannot satisfy a user's request,the request is sent to ____.

A) another device manager
B) a central controller
C) a waiting queue
D) the heap

Question 24

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.

A) STOP
B) WAIT
C) BUSY
D) RESPONSE

Question 25

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

A) lack of scalability
B) lack of global control
C) lack of security
D) prohibitive cost

Question 26

In a DO/S,the ____ is responsible for process synchronization mechanisms and communication support.

A) kernel
B) central controller
C) network manager
D) the responsibility is shared among sites

Question 27

The focus of a network operating system is ____.

A) providing security
B) managing users
C) sharing resources
D) running programs

Question 28

In ____ communication schemes,the sender and receiver are linked and ready to send and receive.

A) asynchronous
B) synchronous
C) indirect
D) direct

Question 29

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 ____.

A) the priority of each process
B) the network's usage patterns
C) the priority of the node generating the request
D) a round robin scheduling algorithm

Question 30

In process-based DO/S,resources are controlled by servers called ____ that are responsible for accepting requests for service on the individual devices they control,processing each request fairly,providing service to the requestor,and returning to serve others.

A) kernels
B) guardians
C) spoolers
D) nodes

Question 31

The ____ file function causes the DO/S File Manager to use a master directory with information about all files stored anywhere on the system and set up a channel to the file.

A) Find and Open
B) Read
C) Write
D) Create

Question 32

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)____.

A) logically distributed system
B) stand-alone system
C) process-based DO/S
D) object-based DO/S

Question 33

To control resource clusters as a group,most process-based systems are configured around complex ____,which manage multiple resources or divide the work among subordinate processes.

A) resource managers
B) semaphores
C) scheduling algorithms
D) server processes

Question 34

Typically,a DO/S system's scheduling function has three parts: a ____,a priority function,and an arbitration rule.

A) request evaluator
B) scheduling request
C) decision mode
D) request queue

Question 35

____ techniques in an object-based DO/S give the system the ability to perform concurrent reads and writes,as long as the results of these actions don't jeopardize the contents of the database.

A) Query processing
B) Concurrency control
C) Location transparency
D) Data redundancy

Question 36

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

A) statistical decision theory
B) estimation theory
C) queuing theory
D) grouping theory

Question 37

The major difference between a NOS and DO/S involves ____.

A) the management of local and global resources
B) the cost for each installation
C) the scalability of the network
D) the capabilities provided by the local operating system

Question 38

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.

A) page fault
B) page request
C) page allocation
D) demand page

Question 39

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) sharing
B) stacking
C) turning
D) paging

Question 40

In a typical NOS environment,a user who wants to run a local process at a remote site must first ____.

A) log on to the local network
B) instruct the local system to migrate the process or data to the remote site
C) send a request to the remote site to schedule the process on its system
D) log on to the NOS