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$.$ BII

d$)CMPA{l}^{.}4$

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

a$)n1db*56$

b$)n2db56$

$-$c$)n3db56h$

d$)n4$ dw $0506h$

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$)$ ODh

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 $200H$

DATAI DB $8,?,8$ DUP$($I$0$H$)$

MOV $AH,$OAH

MOV DX$,$ OFFSET DATAI

INT $21H$

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$)*D*$

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

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

d$)CR$

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

b$)$ D$2$E$04$

b$)D{}_{2}C_{00}$

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

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