4. Operation code field is present in a) programming language instruction b) assembly language instruction c) machine language instruction d) none of the mentioned 5. In a machine instruction format, a +/- sign is represented by a) status bit b) sign bit c) sign extension bit d) none of the above 6. The instructions which after execution transfer control to the next instruction in the sequence are called a) Sequential control flow instructions b) control transfer instructions c) Sequential control flow & control transfer instructions d) none of the above