Question Detail Shortest Job First executes first the job with the least processor needsthat first entered the queuethat has been in the queue for the longestthat last entered the queue Answer: Option A Similar Questions : 1. Dispatcher function is to put tasks in I/O waitschedule tasks in processorchange task prioritiesAll of above Answer: Option A 2. Semaphores function is to synchronize critical resources to prevent deadlocksynchronize processes for better CPU utilizationused for memory managementnone of above Answer: Option A 3. Root directory of a disk should be placed at the fixed address in the main memoryat a fixed location on the diskat the fixed location on system diskanywhere on the disk Answer: Option B 4. Which operating system reacts in the actual time Batch systemQuick response systemReal time systemTime sharing system Answer: Option C 5. Size of virtual memory depends on size of data bussize of address bussize of main memorynone of above Answer: Option B Read more from - Operating System Questions Answers - Chapter 1