8051 Registers MCQs

Practice 8051 Registers MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Microprocessors & Microcontrollers8051 Registers

The 8051 DPTR register is how many bits wide?

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Correct Answer: B. 16 bits

Explanation: DPTR is a 16-bit data pointer composed of DPH and DPL.

Reference: Standard microprocessors and microcontrollers: 8051 registers

Question 2

Microprocessors & Microcontrollers8051 Registers

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Correct Answer: A. RS1 and RS0

Explanation: PSW bits RS1 and RS0 select one of the four register banks.

Reference: Standard microprocessors and microcontrollers: 8051 registers