CS401 Quiz 2 by Abrar Ch

1. There are

forms of MOVS instruction.

2. The program segment prefix for com files is of

size.

256 bytes

Q3. Which of the following instructions, selects the memory address space?

Mov …..confirm

Q4. Which of the following instructions, selects the peripheral address space?

IN…..confirm

Q5. Which of the following instructions to read and write from the peripheral address space?

IN and OUT……confirm

6. INT instruction takes a

byte(s) argument varying from 0-255.

Single(1)…..confirm

7. Which of the following interrupt requests (IRQ) is derived by the keyboard when generates an interrupts when a key is pressed or released.

Q8. Which of the following interrupt requests (IRQ) is the cascading interrupt connected to the output of the second 8451 in the machine?

Q9. Which of the following interrupt requests (IRQ) is connected to serial port COM 2?

Q10. Which of the following interrupt requests (IRQ) is connected to serial port COM 1?

11. Which of the following interrupt requests (IRQ) is used by the sound card or network card.

Q12. Which of the following interrupt requests (IRQ) is used by the floppy disk drive ?

Q13. Which of the following interrupt requests (IRQ) is used by the parallel port?

14. register is used for storing the base and limit of GDT.

GDTR…..confirm

15. The first entry of the GDT must always be zero. It is called the

Null descriptor….confirm

16. In intel 8088 there are a total of

possible interrupt vectors in an interrupt Vector Table.

256….confirm

Q17. Which register is generally used to specify the service number of an interrupt?

Ax…..confirm from net

Q18. In the context of video services, if we want to write string then which of the value will be placed in AH?

13h….confirm

Q19. In 9pin DB 9 connector, which pin is assigned to Signal Ground?

5….confirm

Q20. In 9pin DB 9 connector, which pin is assigned to Data terminal?

4….confirm

Q21. In 9pin DB 9 connector, which pin is assigned to transmitted data?

3…..confirm

Q22. In 9pin DB 9 connector, which pin is assigned to Received data?

2…..confirm

Q23. In 9pin DB 9 connector, which pin is assigned to Carrier Detect?

1…..confirm

Q24. In 9pin DB 9 connector, which pin is assigned to Data Set?

6……confirm

Q25. In 9pin DB 9 connector, which pin is assigned to request to send (RTS)?

7…..confirm

Q26. In 9pin DB 9 connector, which pin is assigned to Clear to send (CTS)?

8…..confirm

Q27. In 9pin DB 9 connector, which pin is assigned to Ring indicator(RI)?

9……confirm · 28. The first parallel port LPT1 has ports designated from · to