Which of the following must be true for the $$RFE$$ (Return From Exception) instruction on a general purpose processor?
$$1.$$ It must be a trap instruction
$$2.$$ It must be a privileged instruction
$$3.$$ An exception cannot be allowed to occur during execution of an $$RFE$$ instruction.

Consider the following program segment. Here R1, R2 and R3 are the general purpose registers.

Assume that the content of memory location $$3000$$ is $$10$$ and the content of the register $$R3$$ is $$2000$$. The content of each of the memory locations from $$2000$$ to $$2010$$ is $$100.$$ The program is loaded from the memory location $$1000.$$ All the numbers are in decimal.

Assume that the memory is byte addressable and the word size is $$32$$ bits. If an interrupt occurs during the execution of the instruction $$''INC$$ $$R3'',$$ what return address will be pushed on to the stack?

Consider the following program segment. Here R1, R2 and R3 are the general purpose registers.

Assume that the content of memory location $$3000$$ is $$10$$ and the content of the register $$R3$$ is $$2000$$. The content of each of the memory locations from $$2000$$ to $$2010$$ is $$100.$$ The program is loaded from the memory location $$1000.$$ All the numbers are in decimal.

Assume that the memory is word addressable. The number of memory references for accessing the data in executing the program completely is

Consider the following program segment. Here R1, R2 and R3 are the general purpose registers.

Assume that the content of memory location $$3000$$ is $$10$$ and the content of the register $$R3$$ is $$2000$$. The content of each of the memory locations from $$2000$$ to $$2010$$ is $$100.$$ The program is loaded from the memory location $$1000.$$ All the numbers are in decimal.

Assume that the memory is word addressable. After the execution of this program, the content of memory location $$2010$$ is