- India
- Turkey
- Iceland
- China
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Option 4 : China
- China has the highest production of paddy in the world with an annual production of around 209 million tonnes.
- It is followed by India, Indonesia and Bangladesh in terms of production of paddy in the world.
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Consider the following solution to the producer-consumer synchronization problem. The shared buffer size is . Three semaphores empty, full and mutex are defined with respective initial values of 0, and 1. Semaphore empty denotes the number of available slots in the buffer, for the consumer to read from. Semaphore denotes the number of available slots in the buffer, for the producer to write to. The placeholder variables, denoted by P, Q, R, and S, in the code below can be assigned either empty or full. The valid semaphore operations are: wait ( ) and signal ( ). Producer: Consumer: do {
wait (P) ;
wait (mutex) ;
//Add item to buffer
signal (mutex) ;
signal (Q) ;
} while (1) ; do {
wait (R) ;
wait (mutex) ;
//Consume item from buffer
signal (mutex) ;
signal (S) ;
} while (1) ;
Which one of the following assignments to P, Q, R and S will yield the correct solution?
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