8051 Addressing Modes MCQs : This section focuses on the "8051 Addressing Modes". These Multiple Choice Questions (MCQs) should be practiced to improve the 8051 Addressing Modes skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
In which of these addressing modes, a constant is specified in the instruction, after the opcode byte?
A. register instructions
B. register specific instructions
C. direct addressing
D. immediate mode
Question 2
The address register for storing the 16-bit addresses can only be
A. stack pointer
B. data pointer
C. instruction register
D. accumulator
Question 3
The address register for storing the 8-bit addresses can be
A. R0 of the selected bank of register
B. R1 of the selected bank of register
C. Stack pointer
D. All of the mentioned
Question 4
The addressing mode, in which the instructions has no source and destination operands is
A. register instructions
B. register specific instructions
C. direct addressing
D. indirect addressing
Question 5
The data address of look-up table is found by adding the contents of
A. accumulator with that of program counter
B. accumulator with that of program counter or data pointer
C. data register with that of program counter or accumulator
D. data register with that of program counter or data pointer
Question 6
The instruction, ADD A, #100 performs
A. 100(decimal) is added to contents of address register
B. 100(decimal) is subtracted from the accumulator
C. 100(decimal) is added to contents of an accumulator
D. none
Question 7
The only memory which can be accessed using indexed addressing mode is
A. RAM
B. ROM
C. Main memory
D. Program memory
Question 8
The instruction, ADD A, R7 is an example of
A. register instructions
B. register specific instructions
C. indexed addressing
D. none
Question 9
The instruction, RLA performs
A. rotation of address register to left
B. rotation of accumulator to left
C. rotation of address register to right
D. rotation of accumulator to right
Question 10
The storage of addresses that can be directly accessed is
A. external data RAM
B. internal data ROM
C. internal data RAM and SFRS
D. external data ROM and SFRS
Question 11
The symbol, ‘addr 16’ represents the 16-bit address which is used by the instructions to specify the
A. destination address of CALL
B. source address of JUMP
C. destination address of call or jump
D. source address of call or jump
Question 12
Which of the following is not an addressing mode of 8051?
A. register instructions
B. register specific instructions
C. indexed addressing
D. none