题目内容

The contents of accumulator and CY are FEH and 1 respectively. After execution of instruction “RR A”, the contents of A will be ( )

A. FCH
B. 7FH
C. F1H
D. FDH

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After execution of following two instructions “MOV A, #0FH” and “ANL A, #2CH”, the contents of the accumulator will be ( )

A. 11010111B
B. 11011010B
C. 00001100B
D. 00101000B

Which of the following statements will add the accumulator with register R0?( )

ADD @R0, A
B. ADD A, @R0
C. ADD R0, A
D. ADD A, R0

To complement the A, we must exclusive OR() it with( )

A. 7FH
B. 80H
C. FEH
D. FFH

After execution of following 3 instructions “MOV A, #02H”, “MOV B, #04H”, and “MUL AB”, the contents of A and B will be ( )

A=02H, B=04H
B. A=08H, B=04H
C. A=08H, B=00H
D. A=00H, B=08H