- cs401 (2 march, 2023 )
mostly(15 say 20) MCQz Waqar ki file say thy
MCqs
1.privilage level higher to lower. answer is 0 to 3
2.how to write destination location. answer is ES:DI
3. meaningful instructions of CMPS. answer is REPE and REPNE
4. the interrupt call loads new value in … answer is CS,IP, and FLAGS
5. IRQ 1 is used for . answer is keyboard
6. port designated _____ from 378 to 37A. answer is first parallel port LPT1
7. pin for ground. answer is 18-25
8. BIOS provides __ to the storage medium . answer raw access
9. Dos gives ___services . answer is logical view and more cooked services
10. ____ is operating system extension. answer is Device drivers
11. In 9 pin DB-9 pin 9 is . answer Ring indicator
12. VESA stand for___ Video electronic Standard association
13. the 16 color bits for every pixel are organized in ___ 5:6:5
14. 32 bit linear frame buffer base address is available at offset ___mode information buffer. answer is. 28
15. the ____ and ____ have same meaning as in data and code descriptor. answer is P and DPL
16. C parameters are pushed in ____ order with the right most being pushed first . answer is reverse
17. 68K processor is ___ bit processor.. answer is 16 bit
18. which can hold addresses in indirect memory accesses . answer is A0 to A7
19. Value of AH in int 14 is___ 01h
20. Int 10 use for ____ video servics
short question (3 marks)
1. write prefixes of CMPS
2. EOI stand for and it’s purpose. End of interrupt
3. define transient program area and why it is used?
4. write any three pin of 9pin DB-9 ?
5. How to define IDTR.
6. yad nilong question
1. D/f between IRQ and INT pin
2. how is protected mode is different from real mode?
3. define register and what show AH,BH,AL,CX,DX in video writegraphic pixel
4. yad ni