CS401 CURRENT FINALTERM PAPER FALL 2013 SHARED BY ℏმℵἾ FILE 8

My today cs401 exam
most mcqs from past papers muaz saddiqe
and Subjective Questions are following....

Why interrupt requests conflict occurs? (2)

Differentiate between code descriptor and data descriptor (2)

What are the services provided by Int 0x16? (2)

Provide names of different types of device drivers. (2)

For which purpose INT 3 is used and describes the functionality of this interrupt?  (3)

In the assembly language programming which service is used while exciting Vesa Get VGA Mode Information and describe all the registers which are used in this mode. (3)

Write a program in assembly language that disables the keyboard interrupt by using the “Programmable Internet Controller” mask register. (3)

In context if DOS services write down the purposes of each instructions given below

mov dx, buffer
mov ah, 0 X 0A
Int 0 x21 (3)
    Explain the purpose and functionality of programmable interrupts controller (PIC) (5)
10.Write an assembly language for drawing a line in graphics mode of video services. (5)
11.In case of assembly language which interrupts and registers value has been set in order to initialize the serial port. (5)
12.Consider the function int multiply (int x, int y), declared write the code to call this function from assembly language. (5)