What is the purpose of the MUL instruction in the context of display memory?

• A) Performs unsigned multiplication
• B) Clears the screen
• C) Multiplies ASCII codes
• D) Controls cursor attributes

How is the screen location calculated (in the context of display memory formation)?

• A) Multiplying row number by 80 and adding column number
• B) Dividing row and column numbers
• C) Adding row and column numbers
• D) Using the MUL instruction

What does the attribute byte in the word designated for one screen location hold?

• A) Video controller instructions
• B) ASCII code for the character
• C) Cursor height information
• D) Foreground and background colors

Which of following interrupt is used for BIOS Video Services

• A) 0x13
• B) 0x10
• C) 0x16
• D) 0x21

How is the video device perceived by the computer in terms of memory?

• A) Independent of system memory
• B) Only accessible through I/O ports
• C) Two-dimensional space with ASCII codes
• D) Linearly mapped memory

Service numbers are given in ________ register while sub services in ________

• A) AH, AL or BL
• B) Ax, Bx
• C) Al, Ah or ax
• D) AX, Al or Ah

What effect does setting bit 7 in the attribute byte have on the foreground character (in the context of display memory)?

• A) Clears the screen
• B) Initiates blinking
• C) Intensity of foreground color
• D) Changes background color

While displaying something on screen, why is ES loaded with the segment of video memory?

• A) To open a window to the video memory
• B) To access data
• C) To manipulate ASCII codes
• D) To control cursor position

What is the significance of the memory location B8000 in the context of Display Memory?

• A) BIOS vendor's problem location
• B) Segment register for accessing video memory
• C) Physical memory location for video controller's memory
• D) Default cursor position

What is the purpose of sending 0x40 to the VGA card in the context of display memory formation?

• A) Change cursor position
• B) Set resolution
• C) Clear the screen
• D) Turn pixels on and off

How many I/O Ports are there?

• A) 65536
• B) 65524
• C) 65548
• D) 65520

Which of following jump would perform better to sort the signed numbers?

• A) jz
• B) jcx
• C) jge
• D) jle

RET pops the ______ at the top of the stack into the instruction pointer and increments SP by ________.

• A) byte, one
• B) word, one
• C) word, two
• D) byte, two

mov byte [swap], 0 What would happen if we dont use the keyword byte or word before the operand?

• A) Its good to use, otherwise size mismatch error may occur
• B) Nothing will happen, program will run smoothly all the time
• C) Nothing will happen but its good practice to use theses keywords
• D) Its useless to use these keywords

REP with _____will utilizes the full processor power to do the scrolling in minimum time

• A) SCAS
• B) LES
• C) MOVS
• D) REPNE

Far calls are also called ______________ calls.

• A) inter segment
• B) obscure
• C) intra segment
• D) distant

The execution of the instruction "mov word [ES : 160], 0x1230" will print a character on the screen at:

• A) Second column of first row
• B) First column of second row
• C) Second column of second row
• D) First column of third row

When all the general registers are used then a subroutine can receive maximum _____ parameters.

• A) 5
• B) 7
• C) 6
• D) 4

Shift Arithmetic Left (SAL) can also be called as

• A) Rotate Left
• B) Shift Logical Right
• C) Shift Logical Left
• D) Rotate right

Which of the following statement best describes the Shift Logical Right (SHR) operation?

• A) The Right most bit is transferred to AX
• B) Inserts a zero from right and moves every bit one position to the left
• C) The Left most bit is transferred to AX
• D) Inserts a zero from left and moves every bit one position to the right