CS401 Quiz 2 Searching by MSA VU Services

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

4. Which of the following instructions, selects the peripheral address space? IN…..confirm
5. 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

17. 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

19. In 9pin DB 9 connector, which pin is assigned to Signal Ground? 5….confirm

20. In 9pin DB 9 connector, which pin is assigned to Data terminal? 4….confirm

21. In 9pin DB 9 connector, which pin is assigned to transmitted data? 3…..confirm

22. In 9pin DB 9 connector, which pin is assigned to Received data? 2…..confirm

23. In 9pin DB 9 connector, which pin is assigned to Carrier Detect? 1…..confirm

24. In 9pin DB 9 connector, which pin is assigned to Data Set? 6……confirm

25. In 9pin DB 9 connector, which pin is assigned to request to send (RTS)? 7…..confirm

26. In 9pin DB 9 connector, which pin is assigned to Clear to send (CTS)? 8…..confirm

27. 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 _______.