CS401 Final Term MCQs by VU Topper RM

Q1. Vu-Topper RM (1 marks)

Which of the following is used to terminate a string in assembly language?

Q2. Vu-Topper RM (1 marks)

Which of the following registers are used as a DOS input buffer? DS:AX SS:SP

DS:DX Page144

CS:BX

Q3. Vu-Topper RM (1 marks)

BIOS video services are exported via interrupt

INT10 Page141

INT9 INT8 INT7

Q4. Vu-Topper RM (1 marks)

In interrupt masking, We use ________ to get control from the program without letting the program know about it.

IRQ 0 Page131

IRQ 1 IRQ 2 IRQ 3

Q5. Vu-Topper RM (1 marks)

In case of COM file, maximum length of parameters passed through command line can be ___ 63 bytes 127 bytes

255 bytes

511 bytes

Q6. Vu-Topper RM (1 marks)

In case of COM file, first command line parameter is stored at ___ offset of 'program segment prefix'

0x80

0x82 0x84 0x86

Q7. Vu-Topper RM (1 marks)

In multitasking, which of the following interrupts is used as scheduler during context switching?

INT 21 INT 16 INT 13

INT 8 Page133

Q8. Vu-Topper RM (1 marks)

____________ is the highest priority interrupt in interrupt controller.

IRQ 0 Page106

IRQ 1 IRQ 2 IRQ 3

Q9. Vu-Topper RM (1 marks)

Which of the following INT 21 service is used to read character from standard input?

01 Page144

Q10. Vu-Topper RM (1 marks)

As compared to _________ , ___________ provides more cooked services.

BIOS, DOS Page153

DOS,OS DOS, BIOS OS, DOS

Q11. Vu-Topper RM (1 marks)

Data) ?

3 Page163

Q12. Vu-Topper RM (1 marks)

Hard disk MBR( Master Boot Record ) is of size

446 bytes Page150

350 bytes 512 bytes 256 bytes