Deck 10: Management of Network Functions

Question 1

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.

Answer 1

True

Question 2

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.

Answer 2

True

Question 3

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

Answer 3

False

Question 4

DO/S was developed before NOS.

Question 5

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

Question 6

The kernel environment for distributed systems may have a scheduler but is also capable of providing its own scheduling.

Question 7

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

Question 8

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

Question 9

The network operating system handles the interfacing details and coordinates the remote processing.

Question 10

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 11

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

Question 12

A DO/S should 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 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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

Question 18

In a typical NOS environment, a user who wants to run a local process at a remote site must log on to the remote network and then instruct the local system to migrate the process or data to the remote site.

Question 19

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 20

Networks were created initially to share data.

Question 21

When either the sender and receiver are linked and ready to send and receive, the communication is ____.

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

Question 22

Typically, the 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 23

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 24

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

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

Question 25

When processes-or objects-need to communicate with each other, the Network Manager links them together through a queue.

Question 26

The ____ control is used to facilitate automatic bounds-checking on stacks and other types of data structures.

A) Guard-page
B) No-access
C) Execute-only
D) Read-only

Question 27

To control the demand, 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 28

Most Web browsers display FTP directories using graphical icons to represent available files and directories.

Question 29

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 30

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 between site operating systems
B) managing all communications within a central controller
C) a dispatcher on each machine communicates with the dispatchers on the other sites
D) having requests that are sent to queues

Question 31

For each node, 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 32

____ is true of a NOS.

A) Requests are passed from node to node via the NOS.
B) Local resources are managed globally.
C) Resources are owned by local nodes.
D) Resources are owned by the global system.

Question 33

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 34

The biggest limitation of a NOS is ____.

A) performance issues
B) that it does not take global control over management functions
C) that it does not provide security
D) that it is prohibitively expensive

Question 35

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 36

To determine an object's state, one must ____.

A) examine the state property
B) look in the object state block
C) perform an appropriate operation on it
D) examine the state table maintained by the DO/S

Question 37

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

Question 38

Deadlock caused by circular waits is not an issue in a distributed operating system.

Question 39

Networks are becoming increasingly homogeneous.

Question 40

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

A) how each views and manages the local and global resources
B) the cost for each installation
C) the scalability when adding new nodes
D) the capabilities provided by the local operating system

Question 41

____ techniques 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 42

In process-based DO/S, special servers called ____ 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 43

The main function of a DO/S File Manager is to ____.

A) gather remote files into a single location
B) pass requests to local File Managers
C) provide transparent mechanisms to work with files
D) provide security to distributed files

Question 44

The focus of a NOS is ____.

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

Question 45

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 46

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 47

The ____ program helps users transfer files from one computer to another.

A) telnet
B) SecureTransfer
C) MTP
D) FTP

Question 48

When a user wants to print a file by executing a print command the user's File Manager places a copy of the file in the DO/S ____ directory.

A) print
B) spooler
C) print queue
D) device

Question 49

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 50

Once an object has been scheduled, the Process Manager must wait for the kernel dispatcher to pull it out and place it into the ____ state.

A) NEXT
B) STOP
C) WAIT
D) RUNNING