The 8051 Microcontroller Questions and Answers

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Showing 10 of 59 questions
Q1
The internal RAM memory of the 8051 is:
  • A 32 bytes
  • B 64 bytes
  • C 128 bytes
  • D 256 bytes
Answer: Option C
Q2
The internal RAM memory of the 8051 is:
  • A 32 bytes
  • B 64 bytes
  • C 128 bytes
  • D 256 bytes
Answer: Option C
Q3
This program code will be executed continuously: STAT:     MOV A, #01H                JNZ STAT
  • A TRUE
  • B FALSE
Answer: Option A
Q4
The 8051 has ________ 16-bit counter/timers.
  • A 1
  • B 2
  • C 3
  • D 4
Answer: Option B
Q5
The address space of the 8051 is divided into four distinct areas: internal data, external data, internal code, and external code.
  • A TRUE
  • B FALSE
Answer: Option A
Q6
Data transfer from I/O to external data memory can only be done with the MOVX command.
  • A TRUE
  • B FALSE
Answer: Option A
Q7
The 8051 can handle ________ interrupt sources.
  • A 3
  • B 4
  • C 5
  • D 6
Answer: Option C
Q8
The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.
  • A TRUE
  • B FALSE
Answer: Option A
Q9
This statement will set the address of the bit to 1 (8051 Micro-controller): SETB 01H
  • A TRUE
  • B FALSE
Answer: Option B
Q10
MOV A, @ R1 will:
  • A copy R1 to the accumulator
  • B copy the accumulator to R1
  • C copy the contents of memory whose address is in R1 to the accumulator
  • D copy the accumulator to the contents of memory whose address is in R1
Answer: Option C

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