OS_06

If a system is deadlocked, no processes can *

• release resources

• be awakened

• all of the other choices

• run

Dijkstra's Banker's Algorithm require the system to maintain the resource information for each process, including:

• The maximum resources that can be requested by the process

• The number of resources currently acquired by the process

• A count of the system's total resources

• The maximum resources that can be requested and The number of resources currently acquired by the process

Which deadlock condition does Request all resources initially attack? *

• Hold and wait

• Mutual exclusion

• Circular-wait condition

• No preemption

What is the correct approach with requesting the dedicated devices to solve deadlock using Ostrich algorithm?

• The device driver decides blocking and returning an error code

• The device driver kills those requesting processes

• The device driver stops the current jobs and releases the devices

• All of the other choices

If in a resource-allocation graph, each resource type has exactly one instance, which of the following indicate a deadlock situation? *

• The graph has no cycle.

• The graph is connected.

• The graph is not connected.

• The graph has at least one cycle.

____ is when, in modern printing systems, a disk accepts output from several users and acts as a temporary storage area for all output until the printer is ready to accept it *

• Spooling

• Spoofing

• Lagging

• Buffering

What is the correct approach with the hold and wait condition to prevent Deadlock?

• Spool everything

• Request all resources initially

• Take resources away

• Order resources numerically

The permanent blocking of a set of processes that compete for system resources is called *

• None of the other choices

• Prioritization

• Deadlock

• Starvation

Typical approaches to handle deadlocks do not include:

• Avoidance

• Detection

• Prevention

• Deterrence

A system is said to be in an unsafe state if

• A process is indefinitely postponed

• The operating system cannot guarantee that all current processes can complete their work

• The system is deadlocked

• None of the other choices