Solution: The CPU is referred to as the brain of a computer.
It consists of a control unit and the arithmetic and logic unit. It is responsible for performing all the processes and operations.

Solution: The control unit is referred to as the central nervous system because it selects and interprets the instructions and coordinates execution.

Solution: The binary subtraction 0 – 1 gives the result 1.
A borrow of 1 is although generated and is removed from the next higher column.

Solution: In any instruction of the form ADD A, B; the answer gets stored in the A register. The format is: ADD Destination, Source.

Solution: The Program counter contains the address of the next instruction which is to be fetched by the control unit.
All other options are invalid.

Solution: The IR which stands for the instruction register contains the last instruction fetched.
All the others options are registers which are used for the fetch operation.

Solution: The datapath contains the hardware required to fetch the operations. The control tells the data path what needs to be done.

Solution: Sequencing is the process of causing the CPU to step through a series of micro operations. Execution causes the performance of each micro operation.

Solution: Sequencing followed by the process of execution is performed by the Control signals. Sequencing is traversing each and every operation whereas execution causes the performance of each operation.

Solution: In the hardwired control unit, the delay element method uses D-flip flop which causes a delay. Since, in the delay element method, there must be a finite time gap between the 2 steps.