Quectione$1$:

Choose the correct answer for each of the following.

Which instruction among the following is valid?

a$)$ POPAL

b$)$ DAA AL$.$

c$)$ MUL. AI$.$ BHI

d$)CM{P}^{Al}\mathrm{.}4$

Which of the following defines packed BCD number equals $56?$

a$)n1$ db $\text{'}56\text{'}$

b$)n2db56$

$-$c$)n3db56h$

d$)n4dw0506h$

What will be the content of $AL$ register after subtracting $35h$ from it and applying DAS instruction if it is initially has $42h?$

a$)07h$

$-$b$)0Dh$

c$)F9h$

d$)32h$

The monitor coordinates of the top right position in text mode is:

a$)18h,79h$

b$)18h,00$

c$)18,4Fh$

d$)00,4Fh$

Which instruction among the following would change register $CH$ content?

a$)$ ORCH,$CH$

b$)$ ANDCH,$CH$

c$)$ xORCH,$CH$

d$)CMPCH,CH$

$*$Answer questions $(6,7,8),$ given the following code:

ORG $200H$

DATA I DB $8,?,8$ DUP$(10$H$)$

MOV AH$,$OAH

MOV DX$,$ OFFSET DATAI

INT $211H$

What would be the content of memory location with offset address $204H$ once the buffer created:

a$)08H$

b$)10H$

c$)?$

d$)0AH$

What would be the content of the memory location with offset address $206H$ if the user inserted the following string 'STUDENT'?

a$)*D\text{'}$

b$){?}^{\text{'}}N$

c$)\text{'}E\text{'}$

d$)$ CR

Given DS$=$D$2$COH, what is the physical address of the memory location that holds letter $\text{'}U\text{'}$ after inserting the 'STUDENT' string.

b$)D2E04$

b$)DC_{00}$

c$)$ D$2$E$05$

d$)$ D$2$E$06$