The CPU retrieves the upcoming instruction for execution from which system component?
System program counter
During the fetch phase of the instruction cycle, the CPU needs the memory address of the next instruction to be executed.
This address is held in a special register called the Program Counter (PC), which automatically points to the location of the upcoming instruction.
After each fetch, the Program Counter is incremented so that it points to the following instruction in sequence.
The output register, secondary memory, and input buffer do not hold the address of the next instruction, so they cannot supply it.
Hence, the CPU fetches the next instruction from the Program Counter.
Similar Questions
- In which generation were computers bulky, vacuum based and costly?
- In a computer, a menu contains a list of:
- Which of the following is NOT a type of personal computer?
- Which of the following is a component of Central Processing Unit?
Consider the following statements regarding Input and Output devices and select the correct option.
(i) A microphone is an input device that can capture sound, but it cannot output any sound.
(ii) The CPU's processing speed is much faster than the data transfer rate of external devices like printers.
A window that covers the entire screen without showing the desktop behind it is said to be in:
Which statement is True or False about the first and second generations of computers?
(i) The First Generation used Vacuum Tubes, which were bulky and heat-generating.
(ii) The Transistor, which defined the Second Generation, made computers larger, slower, and more expensive.
In the context of computer hardware, what does the abbreviation "PCB" stand for?
Which of the following was the first electro-mechanical computer?
Which component of the Central Processing Unit (CPU) is responsible for performing calculations and logical comparisons?
Important Questions from Introduction to Computers
A four core processor is known as:
Which unit in a computer is responsible for managing the parts of the computer?
Storage device that uses lasers and lights as its technology of reading and writing information is known as __________.
In which of the following countries was the first Electronic Numerical Integrator and Computer, the first programmable general-purpose electronic digital computer, developed?
Where are programs and data to be used by the computer available?
