CS401 Quiz 1

CS401 Quiz 1 2021

Opening date 30 and Due date 31

1. The programmable interval Timer (PTI) has input frequency of ______.

1.19318MHZ ..confirm

Q2. Which of the following IRQs is used for sound card or network card or the modem?

Q3. Which of the following IRQ is used by the floppy disk drive?

4. Which of the following IRQ is used by the parallel port

5. Which of the following IRQ is derived by the keyboard when generates an interrupts when a key is passed or released
6. Which of the following IRQ is the cascading interrupt connected to the output of the second 8451 in the machine.

7. Which of the following IRQ is connected to serial port COM 2

Q8. Which of the following IRQ is connected to serial port COM 1?

9. Which of the following instructions is used to read a character from the keyboard port? in al, 0x60….confirm

Q10. Which of the following instruction is the key left shift?

cmp al, 0x2a…..confirm

Q11. Which of the following instruction is no, try next comparison?

jne nextcmp….confirm

Q12. Which of the following instruction is used to point es to video memory?

mov es, ax…confirm

Q13. Which of the following instruction is used to send EOI to PIC?

out 0x20, al…..confrim

14. Which of the following instruction is used to point as to IVT base

mov es, ax…..confirm

Q15. Which of the following instruction is used to disable interrupts?

Q16. Which of the following instruction is used to store offset at n*4?

mov word [es:9*4], kbisr….confrim

Q17. Which of the following instruction is used to store segment at n*4+2?

mov [es:9*4+2], cs….confirm

18. Which of the following instruction is used to enable interrupts? Sti…..conftim

19. All register and stack of a program are saved in___________. Multitasking…confirm from net

20. _____ is/are the port number(s) for parallel port 378…confirm

21. ______is/are the port number(s) for keyboard · 22. ____is/are the port number(s) for PIC · 20 and 21…confirm

23. Which of the following is the ACK pin in DB-25 connecter? 10….confirm

24. IBM AT has __ Programmable Interrupt Controllers(PIC) 2……confirm

Q25. Which of the following interrupts is of highest priority?

Timer interrupt…..confirm

Q24. Which of the following is the source register in OUT instruction?

25. At the end of servicing an interrupt_________signal is used to inform the Programmable Interrupt Controller (PIC) about it. EOI……confirm
26. The space where all registers of a task are stored is called______ Process Control Block(PCB)
27. INT 08 that is saving and restoring the registers is called_____and the whole event is called a ______________

Schedule, context switch……confirm

28. __________ is used for exporting keyboard service.

29. _________ is used for exporting video services accessible

30. _______is used for parallel port services and similarly others through different interrupts.