Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following conditions need to be held simultaneously for deadlock occurrences

Which of the following conditions need to be held simultaneously for deadlock occurrences Correct Answer Mutual Exclusion, Hold and Wait, No Preemption, and Circular Wait

The correct answer is option 1.

Concept:

When a process requests for the resource that is been held another process that needs another resource to continue, but is been held by the first process, then it is called a deadlock.

There are 4 conditions necessary for the occurrence of a deadlock.

Mutual Exclusion:

Only one process can hold a resource at a time. In other words, if a process P1 is utilizing a resource R at a specific moment in time, another process P2 cannot hold or utilize the same resource R at that same moment. Process P2 can make a request for that resource R, but it cannot use it at the same time as process P1.

Hold and Wait:

A process can hold several resources at the same time while also requesting resources from another process. A process P1, for example, can have two resources R1 and R2 while also requesting a resource R3 that is currently owned by process P2.

No preemption:

A resource cannot be forcibly removed from a process by another process. If a process P1 is using a resource R, for example, another process P2 cannot take that resource by force. If that's the case, what's the point of using different scheduling algorithms?  Process P2 can make a request for the resource R and then wait for process P1 to liberate it.

Circular Wait:

The first process is waiting for the resource held by the second process, and the second process is waiting for the resource held by the third process, and so on. Finally, the last process is waiting for the first process's resource. As a result, each process is waiting for the other to release the resource, with no one releasing their own. Everyone is waiting for the resource to arrive. This is referred to as a circular wait.

Hence the correct answer is Mutual Exclusion, Hold and Wait, No Preemption, and Circular Wait.

Related Questions

Consider the following policies for preventing deadlock in a system with mutually exclusive resources. I. Processes should acquire all their resources at the beginning of execution. If any resource is not available, all resources acquired so far are released II. The resources are numbered uniquely, and processes are allowed to request for resources only in increasing resource numbers III. The resources are numbered uniquely, and processes are allowed to request for resources only in decreasing resource numbers IV. The resources are numbered uniquely. A process is allowed to request only for a resource with resource number larger than its currently held resources Which of the above policies can be used for preventing deadlock?
Let L1 = {w ∈ {0, 1}*|w has at least as many occurrences of (110)’s as (011)’s}. Let L2 = {w ∈ {0, 1}*|w has at least as many occurrences of (000)’s as (111)’s}. Which one of the following is TRUE?
Which of the following is not true with respect to deadlock prevention and deadlock avoidance schemes?
For a deadlock to arise, which of the following conditions must hold simultaneously?
The conditions regarding selection from a list of suitable candidates to be called for interview after a written examination for appointment of management-level persons to a multi-national company providing accounting services and sales are mentioned below. Candidates: a) Must have a Bachelor's degree in Basic Science with 65% or more marks or BE with 55% or more marks. b) Must have passed the examination with 70% or more marks. c) Age must be between 25 to 30 years as of 1/4/18. d) Must have 3 years of experience in an Accounting Institution and must have a Diploma in Accounting with 60% or more marks. e) Must be currently getting CTC of Rs. 6 lakh or more per annum. If the candidate: 1) If he fulfills all the other conditions other than A above, he will be designated as Junior Accountant. 2) If he fulfills all the other conditions other than (d) and (e) above, he can be designated as Trainee-Accountant. If he fulfills all the above conditions including 5 years of experience, he can be designated as a Senior Accountant. He can be designated as Manager (Accounts) if he fulfills all the above criteria including educational qualifications of CA/ ICWA/ MBA (Finance). Study all the above information and answer the following question. Varun has passed the CA exam and has a bachelor's degree in basic science and a diploma in accountancy, having scored 75% or more in the written examination during his entire career and also in the written examination. His age is 27 years and with 4 years of experience in Accountancy, he has a CTC salary of 18 lakhs per annum. To which of the following positions can he be referred? Select from the given options.
Statement: Syrian President Bashar al-Assad has revealed during an interview that a direct clash between the US and Russia in Syria was narrowly avoided "by the wisdom of the Russian leadership".  Which of the following objection(s) might be a probable reason(s) for such a revelation by Syrian President Bashar al-Assad? I. Adding that Syria needs Russian support, Assad said, "At the same time we need to avoid the American foolishness in order to be able to stabilise our country". II. Adding that Syria needs American support, Assad said, "At the same time we need to avoid the American foolishness in order to be able to stabilise our country". III. Adding that Syria needs Russian support, Assad said, "At the same time we need to avoid the Russian foolishness in order to be able to stabilise our country". IV. Adding that Syria needs American support, Assad said, "At the same time we need to avoid the Russian foolishness in order to be able to stabilise our country".
"The needs of children with special needs will vary from child to child depending on the disability he/she has." With respect to this given statement, which of the following statement is correct? I. A child with mental retardation will not need concrete material but will need repeated instruction to understand a concept. II. A child with motor disabilities will need physician support depending on the need.
n the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. The rising sun has great inner ______. Not just to ______ the new morning right after the dark night, but also the new rhythms and vibrations within existence. Theentire universe – including the trees, birds and flowers – wake up to the rising sun. When we listen to the birds chirping and see the flower petals open, rememberthat the sunrise is not just a great happening on the outside. If we are alert and aware, then the sunrise is also happening deep within us. Something within ourselvesis also ______ with the first rays of the sun. We just need to be sensitive and available; we just need to be ______. Like the outside world, we need to open the inner doorto let the new dawn enter within. Just open the window of our inner world and allow the beautiful experience of sunrise to ______ within ourselves – this experience isbeyond anything earthly. we just need to be ______.
Which of the following statements are correct? Answer by using the code given below:
1. Persons in Govt/Judicial service need not resign to participate in District judge selection process held in "Vijay Kumar Misra and another v. High Court of Judicature at Patna" by the Supreme Court of India
2. The Supreme Court of India held in S. Kazi v. Muslim Education Society that " All Tribunals are not necessary parties to the proceedings where legality of its orders challenged"
3. The Supreme Court of India observed in Cardanumom Marketing Corporation and others v. State of Kerala and others that Social Security to the legal profession becomes an essential part of legal system
4. The Supreme Court of India held in 'Union of India v. Rajasthan High Court and others that High Court judges are exempted from Airport frisking.
What is correct: (i) In a Gram Panchayat there can be more than one village. (ii) Meeting of Gram Sabha held in each village. (iii) Meeting of Gram Sabha held in the headquarter of Gram Panchayat. (iv) Meeting of Gram Panchayat held in each village. (v) Meeting of Gram Panchayat held in the headquarter of Gram Panchayat.