One necessary condition for deadlock is , which states that there is a chain of waiting processes whereby P0 is waiting for a resource held by P1, P1 is waiting for a resource held by P2, and Pn is waiting for a resource held by P0.

Circular wait.

Explanation:

Of all four necessary conditions of deadlocks encountered so far, i can easily ascertain that the circular wait is the perfect match for the case above.

The circular wait algorithm processes are required to access or use a resource a specific order, so when one process is finished employing a resource, the following process within the queue takes the resource, uses it after which it'll give to the following waiting process in queue and also the sequence continues.

Assuming you've got three process named A, B and C and that they must use a resource in an exceedingly manner that circular wait are going to be implemented, process A will take the resource and use it for a substantial amount of your time and when it's done process B will take the resource and use it for a substantial amount of your time so hand the resource to process C. Process C will hand the resource to A after it's finished it, and therefore the process continues that way.

the answer is d i just took the test (provides the number of allowances an employee has claimed.)

of the three mortgage options that demarco and tanya have to choose from, the balloon payment mortgage would be their best option, over adjustable payment and fixed payment plans.ultimately, the balloon payment plan would save demarco and tanya overall, in interest, would cost less monthly, and they would only have to make these payments for 8 years, opposing to 30 years for adjustable or fixed payment plans. 

overall, demarco and tanya would save $80,811 if they chose balloon payments over fixed payments, and would save $116,711 if they choose balloon payments over adjustable payments. benefits with choosing fixed payments over adjustable payments is that, in the end, the payments will still be $836.30 a month, while with adjustable payments, the initial monthly payments will be $763.38 to $1082.70 a month, ultimately leading to a more costly purchase. benefits with choosing fixed payments over balloon payments are not present. benefits in choosing adjustable payments over is that it has a lower interest rate, and starts with lower monthly payments initially. benefits in choosing adjustable payments over balloon payments include a lower interest rate, and lower initial monthly payments. benefits in choosing balloon payments over fixed payments include lower interest rates, lower overall price, lower monthly payments, takes less time to pay off, and does not require a downpayment. benefits in choosing balloon payments over adjustable payments include, lower monthly payments (when averaged), takes less time to pay off, and lower overall price.

hence, option c, balloon payments, is the best option for demarco and tanya to make this purchase, for it will save them a minimum of $80811, and a maximum of $116,711.