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Q: Which of the following is not a register of computer?
  • A. Accumulator
  • B. Stack pointer
  • C. Program counter
  • D. Buffer
Correct Answer: Option D - The data register is the type of computer register that is used basically in microcomputers in order to store the information temporarily that has been carried to or from any peripheral device. Besides these, some other computer registers are flag register, stack control register, instruction register, and program counter. Buffer is not a register of computer.
D. The data register is the type of computer register that is used basically in microcomputers in order to store the information temporarily that has been carried to or from any peripheral device. Besides these, some other computer registers are flag register, stack control register, instruction register, and program counter. Buffer is not a register of computer.

Explanations:

The data register is the type of computer register that is used basically in microcomputers in order to store the information temporarily that has been carried to or from any peripheral device. Besides these, some other computer registers are flag register, stack control register, instruction register, and program counter. Buffer is not a register of computer.