## What will be the contents of Carry flag and Accumulator after executing the instruction SUBB A,#0F0H

1.Accumulator register contains 0FH and the Carry flag CY is in the cleared state. What will be the contents of Carry flag and Accumulator after executing the instruction SUBB A,#0F0H

(a) Accumulator = E1H; Carry flag = 1 (b) Accumulator = E1H; Carry flag = 0

(c) Accumulator = 1FH; Carry flag = 0 (d) Accumulator = 1FH; Carry flag = 1

2. Accumulator register contains F0H and the Carry flag CY is in the cleared state. What will be the contents of the Carry fl ag and the accumulator after executing the instruction SUBB A,#0FH

(a) Accumulator = E1H; Carry fl ag = 1 (b) Accumulator = E1H; Carry fl ag = 0

(c) Accumulator = 1FH; Carry fl ag = 0 (d) Accumulator = 1FH; Carry fl ag = 1

3. Accumulator register contains 0FFH and the B register contains 02H. What will be the contents of the Accumulator and B register after executing the instruction MUL AB

(a) Accumulator = 0FEH; B = 01H (b) Accumulator = 00H; B = 0FEH

(c) Accumulator = 0FEH; B = 00H (d) Accumulator = 01H; B = 0FEH

4. Accumulator register contains 0FFH, B register contains 02H and the Carry flag is in the cleared state. What will be the contents of the Carry flag and Overflow flag after executing the instruction MUL AB

(a) Carry flag = 1; Overflow flag = 0

(b) Carry flag = 0; Overflow flag = Remains same as the previous value

(c) Carry flag = 1; Overflow flag = 1

(d) Carry flag = 0; Overflow flag = 1

5. Accumulator register contains 0FFH, B register contains 02H and the Overflow flag is in the cleared state. What will be the contents of the Carry flag and Overflow flag after executing the instruction MUL AB

(a) Carry flag = remains same as the previous value; Overflow fl ag = 0

(b) Carry flag = remains same as the previous value; Overflow fl ag = 1

(c) Carry flag = 1; Overflow flag = 1

(d) Carry flag = 0; Overflow flag = 1

6. Accumulator contains 0FFH and the B Register contains 02H. What will be the contents of the accumulator and B register after executing the instruction DIV AB(a) Accumulator = 01H; B = 7FH (b) Accumulator = 7FH; B = 01H

(c) Accumulator = 7FH; B = 00H (d) Accumulator = 00H; B = 7FH

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