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8051 Architecture MCQ Questions & Answers

8051 Architecture MCQs : This section focuses on the "8051 Architecture". These Multiple Choice Questions (MCQs) should be practiced to improve the 8051 Architecture skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

The architecture of 8051 consists of

A. 4 latches
B. 2 timer registers
C. 4 on-chip I/O ports
D. all of the mentioned

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Question 2

The device that generates the basic timing clock signal for the operation of the circuit using crystal oscillator is

A. timing unit
B. timing and control unit
C. oscillator
D. clock generator

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Question 3

The receive buffer of serial data buffer is a

A. serial-in parallel-out register
B. parallel-in serial-out register
C. serial-in serial-out register
D. parallel-in parallel-out register

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Question 4

The register that can be used as a scratch pad is

A. Accumulator
B. B register
C. Data register
D. Accumulator and B register

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Question 5

The register that may be used as an operand register is

A. Accumulator
B. B register
C. Data register
D. Accumulator and B register

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Question 6

The register that provides control and status information about counters is

A. IP
B. TMOD
C. TSCON
D. PCON

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Question 7

The register that provides control and status information about serial port is

A. IP
B. IE
C. TSCON
D. PCON and SCON

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Question 8

The registers that are not accessible by the user are

A. Accumulator and B register
B. IP and IE
C. Instruction registers
D. TMP1 and TMP2

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Question 9

The registers that contain the status information is

A. control registers
B. instruction registers
C. program status word
D. all of the mentioned

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Question 10

The transmit buffer of serial data buffer is a

A. serial-in parallel-out register
B. parallel-in serial-out register
C. serial-in serial-out register
D. parallel-in parallel-out register

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Question 11

Which of the processor’s stack does not contain the top-down data structure?

A. 8086
B. 80286
C. 8051
D. 80386

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