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1. Cho bit on chng trnh sau lm nhim v g? MOV AX,0 MOV BX,0 MOV
CX,255 TOP: ADD BL,1 ADD AX,BX LOOP TOP
Thc hin php ton cng AX= 0+1+2++254 Thc hin php ton cng AX=
1+1+2++255 Thc hin php ton cng AX= 1+2+3+ +256 d) Thc hin php ton
cng AX= 1+2+3++255
2. Vit chng trnh nhp 10 s t nhin gm 1 ch s v ct vo ngn xp 10 s .
a)
mov cx,10
l:
mov ah,1
int 21h
and al,0fh
push ax
loop l
b)
mov cx,10
l:
mov ah,1
int 21h
and al,0fh
push al
loop l
c)
mov cx,10
l:
mov ah,1
int 21h
and al,0fh
pop ax
loop l
d)
mov cx,10
l:
mov ah,1
int 21h
and ax,0fh
push ax
loop l 3. on chng trnh sau y lm cng vic g?
mov
ah,1
int 21h
mov
ah,2
mov
dl,al
int 21h
Cho php nhp 1 k t t bn phm. Cho php nhp 1 k t t bn phm v hin th.
Cho php nhp 1 k t t bn phm v hin th k t u dng tip theo. d) Cho php
nhp 1 k t t bn phm v hin th k t cnh k t va nhp.
4. M ASCII ca cc k t thng (a n z) v ca cc k t hoa (A n Z) hn km
nhau: a) 20 n v b) 10 n v c) 32 n v d) 16 n v 5. Trong b VXL 8086,
cc thanh ghi on CS, DS, ES, SS: Cha a ch u ca cc on nh trong b nh.
Cha a lch ca cc nh trong on nh. Phn nh trng thi ca CPU. c s dng
nhiu trong cc php ton s hc. 6. Cho bit kt qu ca thanh ghi AH khi Vi
x l thc hin xong on chng trnh sau: MOV AH,0 MOV AL,0 T: INC AL ADD
AH,AL CMP AL,9 JNE T a) 45 b) 55 c) 2EH d) 44
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7. Cho bit on chng trnh sau lm nhim v g? MOV AL,1 MOV BL,1 MOV
CX,5 TOP: INC BL MUL BL LOOP TOP
AX=6!
AL=5! C a,b,c u sai
8. Cu lnh thit lp cc bt LSB v MSB ca AL trong khi gi nguyn cc bt
khc? a) XOR AL,81h b) OR AL,81h c) AND AL,81h d) TEST AL,81h 9. Thc
hin php cng sau: 16(D) + 20(H) a) 30(H) b) 41(D) c) 00110010(B) d)
30(D) 10. VXL 8086 c th qun l c: a)16MB b nh b) 1MB b nh c) 1024 MB
b nh d) 1024 Bytes b nh 11. Trong ngn ng lp trnh ASSEMBlY, tn (do
ngi s dng t) no sau y hp l a)@Baitap b) 1baitap c) baitap-1 d)
baitap.1 12. Thanh ghi no i y c th tch thnh 2 thanh ghi khc nhau.
a) DS b) IP c) DX d)SP 13. Vit chng trnh kim tra ni dung ca AL. nu
bng 0 th khng lm g, nu khc 0 th xo AL a) b) c) d) AND AL,0FFH JNZ T
XOR AL,AL T:
CMP AL,0 JE T AND AL,01H T:
CMP AL,0 JNE T AND AL,00H T
AND AL,0FFH JZ T XOR AL,AL T:
14. Vit chng trnh tm MAX ca 2 s khng bng nhau, ct vo ngn xp s
ln, gi s 2 s ang nm trong AL v AH. a) b) c) d) CMP AL,AH JA CAT AND
AX,0FF00H PUSH AX JMP T CAT: AND AX,0FFH PUSH AX T:
CMP AH,AL JA CAT AND AX,0FF00H PUSH AX JMP T CAT: AND AX,0FFH
PUSH AX T:
CMP AL,AH JB CAT AND AX,0FF00H PUSH AX JMP T CAT: AND AX,0FFH
PUSH AX T:
CMP AL,AH JA CAT PUSH AX JMP T CAT: PUSH AX T:
15. Cho bit on chng trnh sau lm nhim v g? MOV AL,5 MOV BL,6 MUL
BL PUSH AX MOV AL,BL MOV BL,8 MUL BL POP BX ADD AX,BX
Thc hin php ton: AX = 5.6 + 7.8 Thc hin php ton: BX = 5.6 + 7.8
Thc hin php ton: AX = 8.6 + 6.5 C a,b,c u sai.
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16. Lnh MOV [BX],AX thc hin: a)Chuyn ni dung AX vo 2 nh lin tip
c a ch DS:(BX) v DS:(BX+1) b)Chuyn ni dung ca AX vo BX c)Chuyn ni
dung ca AX vo nh c a ch DS:BX d)Chuyn ni dung ca AL vo nh c a ch
DS:BX 17. Kin trc in hnh ca 1 my tnh gm: a)CPU, Main, RAM. b)CPU, b
nh bn dn, thit b ngoi vi. c)CPU, main, thit v ngoi vi. d)CPU, b nh
bn dn, thit b ngoi vi, khi phi hp vo/ra. 18. Thanh ghi no c th cha
a ch ca cng trong cc lnh vo/ra? a)CS b)DX c)AX d) a,b,c u sai 19.
Thanh ghi no lun tr vo lnh tip theo s c thc hin? a)CS b)IP c)AX d)
BP 20. Cc thanh ghi on c th qun l: a)16bytes b)64kbytes c)32kbytes
d) a,b,c u sai 21. Chon phng n ng nht:
MOV AH,1
INT 21H
CMP AL,39H
JNE t
mov Dl,44H
mov ah,2
int 21h
T:
mov Dl,43H
mov ah,2
int 21h
a)Cho php nhp 1 k t t bn phm v hin th b)Cho php nhp 1 k t t bn
phm nu l s 9 th hin th D, nu khng phi th hin th C. c)Cho php nhp 1
k t t bn phm nu l s 9 th hin th C, nu khng phi th hin th D. d) Cho
php nhp 1 k t t bn phm nu l s 9 th hin th D v C, nu khng phi th hin
th C
22. C no c thit lp sau lnh 2 sau: MOV AL,01H RCR AL,1 a) ZF b)CF
c)OF d)IF 23. Cho kch thc ca on Stack l 512 bytes, Code l 4KB, Data
l 20KB bit a ch cui l 0A48FH. Hy xc nh a ch u ca on Stack nm di
Code v Data a) 0A290H b) 05290H c) 04290H d) 0A28FH 24. Nu
DS=20F0H, BX=1802H, lnh MOV [BX],CH cho AD4AD1 T1 l bao nhiu? A.
1010 B. 0000 C. 0001 D. Khng xc nh 25. Cho gi tr ca nh [1234H] l
78H, gi tr ca nh [1235H] l 15H. Sau chui lnh sau, gi tr ca BX bng
bao nhiu? MOV DI,2 MOV BX,7856H MOV BL,[1234H] MOV AX,1230H MOV
BH,[AX+DI+3] A. 1578H B. 5678H
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C. 1556H D. 7856H
