Page-17
Computer Science
241)The accumulator contains 39H, register C contains 12H, what is the content of accumulator and CY (carry) after executing the following code?
ADD C
DAA
05H, 1
51H, 0
50H, 1
50H,0
Answer :
242)The HL register pair contains 0240H, what is the content of the register pair HL after executing DAD H ?
4084H
0484H
8440H
4480H
Answer :
243)The accumulator contains 85H, register B contains 68H, what is the content of accumulator and CY (carry) after executing the following code?
ADD B
DAA
35H, 1
35H, 0
53H, 0
53H, 1
Answer :
244)The Register pair HL containd 2012H, register B and C contain 14H and 31H respectively, what is the content of H register after executing DAD B ?
34H
43H
44H
40H
Answer :
245)The accumulator contains 54H and register D containd 82H, what is the content of the accumulator and the CY after executing ANA D ? (8085 microprocessor)
00H, 1
ooH, 0
82H, 0
54H, 1
Answer :
246)The accumulator contains 54H and register D containd 82H, what is the content of the Z, P flags? (8085 microprocessor)
1, 0
0, 1
1, 1
0, 0
Answer :
247)The accumulator contains 03H and register D containd 81H, what is the content of the accumulator and the CY after executing ORA D ? (8085 microprocessor)
83H, 0
83H, 1
38H, 0
38H, 1
Answer :
248)The accumulator contains 03H and register D containd 81H, what is the content of the S, Z flag ORA D ? (8085 microprocessor)
1, 0
0, 1
0, 0
1, 1
Answer :
249)The accumulator contains 77H and register D containd 56H, what is the content of the accumulator and the CY after executing XRA D ? (8085 microprocessor)
21H, 1
21H, 0
12H, 0
12H, 1
Answer :
250)The Accumulator contains 4AH, what is the content of the accumulator and the CY after executing ADI 59H ? (8085 microprocessor)
3AH, 0
3AH, 1
A3H, 0
A3H, 1
Answer :
251)The accumulator contains 26H, previous operation has set the carry bit, what is the content of the accumulator and CY after executing ACI 57H ? (8085 microprocessor)
7EH, 0
7EH, 1
E7H, 0
E7H, 1
Answer :
252)The accumulator contains 89A, what is the content of the accumulator after executing CMA
00H
89H
67H
76H
Answer :
253)The accumulator contains A7H and the CY flag is reset, what is the content of the accumulator and CY after executing RAR
35H, 1
35H, 0
53H, 0
53H, 1
Answer :
254)The accumulator contains A7H and the CY flag is reset, what is the content of the accumulator and CY after executing RLC
F4H, 0
4FH, 1
F4H, 1
4FH, 0
Answer :
255)The accumulator contains A7H and the CY flag is reset, what is the content of the accumulator and CY after executing RRC
D3H, 0
D3H, 1
3DH, 0
3DH,1
Answer :
