The value of ____________ is recovered from the stack when RET instruction is executed.

• A) PC
• B) SP
• C) IP
• D) DS

Our computers screen is like a 2-D array having __________ rows and __________ columns.

• A) 25, 40
• B) 40, 25
• C) 25, 80
• D) 80, 25

VGA stands for

• A) Video Graphics Adapter
• B) Video Graphic Accumulator
• C) Video Graphics Application
• D) Visual Graphics Adapter

In the assembly language program, when using div instruction, dividend is stored in ____

• A) Operand placed with div instruction
• B) DI
• C) AX
• D) BX

MOV AX, 0XB800 MOV ES, AX ; This instruction points ES to_______.

• A) graphics base
• B) numeric base
• C) audio base
• D) video base

MOVS instruction is used to ____________

• A) Move register to a memory location
• B) Move a memory location to register
• C) Move memory to memory
• D) Move register to register

In string instructions, the mode is called auto-increment mode when:

• A) DF is set
• B) CX is set
• C) DF is cleared
• D) ZF is cleared

DB-25 is a _______________ port connector.

• A) partially serial
• B) half duplex
• C) serial
• D) parallel

Let's assume that location A in memory has 0000 bits. What will be the result when XOR operation is performed between A and A (A XOR A)?

• A) 1
• B) 0
• C) 11
• D) 10

Which of following pins of parallel port are used to carry the data from processor to the device connected through parallel port?

• A) pin 2 to pin 9
• B) pin 10
• C) pin 4
• D) pin 18 to pin 25

The default source location for both LODS and MOVS instruction is ______.

• A) BP:ES
• B) CS:IP
• C) DS:SI
• D) AX:SI

Using OUT instruction on data port (378), 1 bits result in a ___________ signal on the corresponding pin.

• A) 10V
• B) 1V
• C) 5V
• D) 3V

To return back from the Interrupt Service Routine to position from where ISR was called, which of the following instruction is used?

• A) retf
• B) iret
• C) retn
• D) ret

Which of following IO port is used to send an EOI signal to PIC?

• A) 0x23
• B) 0x20
• C) 0x21
• D) 0x22

Which assembly language instruction is used to enable the interrupt requests?

• A) sti
• B) cli
• C) dit
• D) eit

Every String Instruction in iAPX88 architecture has ____ variants.

• A) 8
• B) 2
• C) 4
• D) 16

If ________ is set, then after every instruction a type 1 interrupt will automatically be generated.

• A) Overflow flag
• B) Trap flag
• C) Parity flag
• D) Carry flag

mov ax,2 push ax pop bx add bx,ax at the end of execution of above code, what will be value in ax?

• A) 1
• B) 0
• C) 4
• D) 2

In iAPX88 architecture, the DOS Interrupt Vector Table resides at _____ memory location.

• A) 8
• B) 4
• C) 2
• D) 0

Which IO port is used to scan the code of key pressed on the keyboard?

• A) 0x62
• B) 0x60
• C) 0x61
• D) 0x63