CS401 Final Term Current Paper 2020 by VUBuddy

WMIg3Q · CS401 CURRENT FINALTERM PAPER FALL 2020 · IMPORTANT:

All Students must prepare this current paper because these questions from previous semesters and most important. Highly recommended and chance to questions repeated from VU

Answer: Prepare for good GPA and Marks.

Cs401

Mcqs past papers sa tha 3masks questions:

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Diff between serial and parallel port communication. How to speed up multitasking. Ik program code aya tha for cant remember the condition.

Subjectives Question and its Answers of my Final Tearm CS401 on 12-Sep-2020

Q) Format of DOS input buffer:

Answer: Offset Size Description maximum characters buffer can hold number of chars from last input which may be recalled OR number of characters actually read, excluding CR n actual characters read, including the final carriage return

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Q) Describe MOVS instructions

Answer: (Page 92) MOVS MOVS transfers a byte or word from the source location DS:SI to the destination ES:DI and updates SI and DI to point to the next locations. MOVS is used to move a block of memory. The DF is important in the case of overlapping blocks. Q) How interrupts are handled in protected mode & IDTR.

Answer: (Page 182)

the IVT at physical address 0 there is the IDT (interrupt descriptor table) located at physical address stored in IDTR, a special purpose register. The IDTR is also a 48bit register similar in structure to the GDTR and loaded with another special instruction LGDT. Q) VESA service "INT 10 – VESA – Get SuperVGA Information" uses which registers to return the result?

Answer: (Page 180) To return the result,