ISRO exam 2015 – Question 35 with Solution

In this video we are going to discuss another question which was asked in the exam of ISRO

At a particular time of computation the value of a counting semaphore is 7. Then 20 P operations and 15 V operations were completed on this semaphore. The resulting value of the semaphore is :
(A) 42
(B) 2
(C) 7
(D) 12