Bissoy.com
Doctors Medicines MCQs Q&A

Which one of following statements is FALSE?

Which one of following statements is FALSE? Correct Answer All unsafe states lead to deadlocks

Option 1) All unsafe states lead to deadlocks, it is a false statement.

Explanation:-

Deadlock:-  A deadlock is a situation in which two computer programs sharing the same resources are effectively preventing each other from accessing the resources, resulting in both programs ceasing to function.

An unsafe state may lead to a deadlock. As long as the state is safe, the OS can avoid unsafe states. Formally, a system is in a safe state only if there exists a safe sequence. So a safe state is not a deadlock state and conversely a deadlock state is an unsafe state.

Key Points

  • In an unsafe state, the operating system cannot prevent processes from requesting resources in such a way that any deadlock occurs.
  • A state of the system is called safe if the system can allocate all the resources requested by all the processes without entering into deadlock.
  • A deadlock state can be perfectly safe, but it lasts forever, so your program has stopped, and will not resume execution.
  • An unsafe state may crash the program, finish it with incorrect results, or indeed, finish it with a correct result. 

Related Questions

Consider the following statements.
1. All valid arguments contain only true premises and a true conclusion.
2. Some valid arguments contain only false propositions - false premises and a true conclusion.
3. All valid arguments contain only false propositions all premises are false, conclusion is false as well.
Which of the above statements is correct?
Two processes X and Y need to access a critical section. Consider the following synchronization construct used by both the processes Process ? /* other code for process ? */ while(true) { varP = true; while(varQ == true) { /* Critical Section */ varP = false; } } /* other code for process ?? */   Process ? /* other code for process ? */ while(true) { varQ = true; while(varP == true) { /* Critical Section */ varQ = false; } } /* other code for process ? */   Here, varP and varQ are shared variables and both are initialized to false. Which one of the following statements is true?
Two statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All statements are answers. Some statements are questions. Conclusions: I. No question is a statement. II. Some answers are statements. III. Some questions are statements.
User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ? (a) (i) The Many - to - one model maps many user threads to one kernel thread (ii) The one - to - one model maps one user thread to one kernel thread (iii) The many - to - many model maps many user threads to smaller or equal kernel threads (b) (i) Many - to - one model maps many kernel threads to one user thread (ii) One - to - one model maps one kernel thread to one user thread (iii) Many - to- many model maps many kernel threads to smaller or equal user threads
Consider the following statements: i. One metre is one-hundredth of one kilometre. ii. One lakh is equal to one hundred thousand. iii. One millilitre is one-hundredth of one litre. iv. One crore is equal to one hundred lakh. Which of the above statements are correct?
Consider the following statements:
1. Having been bound by law to state the truth, a person makes a false statement in a proceeding before a public servant.
2. Having been legally bound by an oath to state the truth a person makes a false statement before a court of justice.
Which of the above will amount to giving false evidence?
Which of the following statements is/ are true ? A. The terms 'true' and 'false' apply to arguments. B. The terms 'true' and 'false' apply to statements. C. The terms 'valid' and 'invalid' apply to arguments. D. The terms 'cogent' and 'non-cogent' apply to statements. Choose the correct answer from the options given below:
Below a question is given with two statements (I) and (II). These statements may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statement. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Statements: I. India has approached the Russian company for purchasing one more squadron of Sukhoi 30 MKI. II. India carried out an airstrike on Pakistani territories using Mirage 2000 on 26 February 2019.
The question given below has two statements I and II. These statements may be either independent causes or maybe effects of independent causes or a common cause. One of these statements may be the effect of the other statement. Read both the statements and decide which of these answer choices correctly depicts the relationship between the two statements. Statements: I. Majority of the residents of the housing society participated in the dinner hosted by one of the members of the society. II. Most of the people living in the housing society invite other members for the functions at their house.
Four statements are given below about a dice on which 6 letters from A to F are written on different faces. Based on the first two statements, the third and fourth statements are either true, false or uncertain. If the first two statements are true, then choose the correct option from the given alternatives for the remaining statements. I. D is the opposite of A. II. B is adjacent to C. III. C is adjacent to D. IV. E is the opposite of F.