Questions

Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.

interrupt is a signal send by external device to the processor so as to request the processor to perform a particular work.

A signal informing a program that an events has occurred. when a program receives an interrupt signal, it takes a specified action (which can be to ignore the signal).

Program counter holds the address of either the first byte of the next instruction to be fetched for exectuion or the address of the next byte of a multi byte instruction, which has not beeb completely fetched. in both the cases it gets increnented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.

Strait of Messina seperates Italy and Sicily , while Strait of Bonifacio is located between Corsica  and Sardinia and Strait of Otranto  is found between Italy and Albania.

China is the largest producer of Rice in the world.

Potentially hazardous foods are foods that might contain food poisoning bacteria and are capable of supporting growth of these bacteria or formation of toxins to levels that are unsafe for consumers, if the foods are not stored at correct temperatures. Toxins are poisonous chemicals produced by some types of bacteria.

The food can be left at room temperature until it reaches 60 deg C because food-poisoning bacteria will not multiply at 60 deg C or above. However, do not leave food cooling at room temperature unless you are sure that the temperature of the food is still at least above 60 C.