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Dear candidates you will find MCQ questions of Operating System (OS) here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

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Mr. Dubey • 51.17K Points
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Q. 251) Concurrent access to shared data may result in                          

(A) data consistency
(B) data insecurity
(C) data inconsistency
(D) none of the mentioned
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Mr. Dubey • 51.17K Points
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Q. 252) A situation where several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which access takes place is called                          

(A) data consistency
(B) race condition
(C) aging
(D) starvation
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Mr. Dubey • 51.17K Points
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Q. 253) The segment of code in which the process may change common variables, update tables, write into files is known as                          

(A) program
(B) critical section
(C) non – critical section
(D) synchronizing
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Mr. Dubey • 51.17K Points
Coach

Q. 254) Mutual exclusion implies that

(A) if a process is executing in its critical section, then no other process must be executing in their critical sections
(B) if a process is executing in its critical section, then other processes must be executing in their critical sections
(C) if a process is executing in its critical section, then all the resources of the system must be blocked until it finishes execution
(D) none of the mentioned
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Mr. Dubey • 51.17K Points
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Q. 255) Bounded waiting implies that there exists a bound on the number of times a process is allowed to enter its critical section

(A) after a process has made a request to enter its critical section and before the request is granted
(B) when another process is in its critical section
(C) before a process has made a request to enter its critical section
(D) none of the mentioned
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Mr. Dubey • 51.17K Points
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Q. 256) A minimum of            variable(s) is/are required to be shared between processes to solve the critical section problem.

(A) one
(B) two
(C) three
(D) four
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Mr. Dubey • 51.17K Points
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Q. 257) In the bakery algorithm to solve the critical section problem                          

(A) each process is put into a queue and picked up in an ordered manner
(B) each process receives a number (may or may not be unique) and the one with the lowest number is served next
(C) each process gets a unique number and the one with the highest number is served next
(D) each process gets a unique number and the one with the lowest number is served next
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Mr. Dubey • 51.17K Points
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Q. 258) An un-interruptible unit is known as

(A) single
(B) atomic
(C) static
(D) none of the mentioned
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Mr. Dubey • 51.17K Points
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Q. 259) TestAndSet instruction is executed

(A) after a particular process
(B) periodically
(C) atomically
(D) none of the mentioned
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Mr. Dubey • 51.17K Points
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Q. 260) Which is the process of invoking the wait

(A) transaction
(B) operation
(C) function
(D) all of the mentioned
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