Described auto increment mode of addressing?

Ans: Effective address of the operand is the contents of a register mention in the instruction.

After finishing the accessing the operand, the contents of this particular register are automatically incremented to point to the next item in the list.

Explained condition code flags? And describe commonly used flags?

Ans: The processor must keep track of the information regarding the results of many

operations for the subsequent conditional branch instructions. It is done by recording required information in individual bits which is called condition code flags.

Four commonly used flags are:

•   Z(Zero)
•   N( Negative )
•   C(Carry)
•   V(overflow)