41. Kernel is

A. considered as critical part of operating system. 
B. software which monitors operating system. 
C. set of primitive functions upon which rest of operating system functions are built up. 
D. none of the above. 

42. A___________ operating system is an operating syatem which requires a timely response from a computer system

A. Batch os 
B. Workstation 
C. a and b 
D. None of the above 

43. following is a path under execution

A. directory 
B. file 
C. thread 
D. all 

44. Which of the following page replacement algorithms suffers from Belady`s anomaly?

A. Optimal replacement  
B. LRU 
C. FIFO 
D. Both optimal replacement and FIFO 

45. DOS is an example of _________ user system

A. Multiuser system 
B. Single user system 
C. both 1 and 2 
D. none of the above 

46. The context of a process is the union of its

A. region table,uarea,system level context and user level context 
B. register context,pregion table,user level context 
C. System level context,register context,user level context 
D. process table,user level context,register context 

47. Locality of reference implies that the page reference being made by a process

A. will always be to the page used in previous page refernce 
B. is likely to be one of the pages used in the last few page references 
C. will always be one of the pages existing in memory 
D. will always lead to a page fault 

48. Main advantage of EISA bus over micro channel bus is

A. it offered more bandwidth over micro channel 
B. it had software configurable devices 
C. it was backward compatible with ISA 
D. it made the existing peripherals run faster 

49. Single system image is obtained in case of _________

A. desktop 
B. Distributed 
C. network 
D. none 

50. 80826 the addressing schema is __________ addressing

A. 8 bit 
B. 16 bit 
C. 24 bit 
D. 28 bit 

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