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COA - Quiz Day 17

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Question 1

Instruction that adds the contents of register B to the accumulator in 8085:

  • ADD B

  • ADI B

  • MOV A,B

  • SUB B

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Question 2

The instruction DAA in 8085 is used to:

  • Adjust binary addition to two’s complement form

  • Adjust binary addition to BCD form

  •  Convert binary to ASCII

  • Adjust binary subtraction result

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Question 3

Flags that are affected by the INR instruction in 8085:

  • All flags

  • All except Carry

  • Only Zero and Sign

  • No flags

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Question 4

Instruction used to transfer data from memory to accumulator indirectly via a segment register in 8086:

  • MOV AL, [BX]

  • MOV AX, BX

  • MOV BX, AX

  • MOV [BX], AL

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Question 5

A string instruction in 8086:

  • MOV AX, BX

  • MOVSB

  • IN AL, DX

  • LEA BX, [SI]

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Question 6

The instruction XRA A in 8085 will:

  • Complement the accumulator

  • AND accumulator with itself

  • XOR accumulator with itself and clear it

  • OR accumulator with itself

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Question 7

Instruction that complements all bits of the accumulator in 8085:

  • CMA

  • CPL

  • COM

  • ANA A

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Question 8

Instruction used to compare the accumulator with a register in 8085:

  • SUB r

  • CPI data

  • CMP r

  • MOV r,A

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Question 9

Working of instruction JNZ address:

  • Jumps if zero flag is set

  • Jumps if zero flag is reset

  • Jumps if carry flag is set

  • Jumps if accumulator is negative

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Question 10

A subroutine call instruction in 8085:

  • HLT

  • IN

  • CALL 2050H

  • JMP 2050H

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There are 10 questions to complete.

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