UGC NET Computer Science Solved Paper II June 2007 - Part 4

31.       The parsing technique that avoids back tracking is:
(A) Top-down parsing            
(B) Recursive-descent parsing
(C) Predictive                          
(D) Syntax tree
Answer: C
32.       A Top-down Parse generates:
(A) Right-most derivation                  
(B) Right-most derivation in reverse
(C) Left-most derivation                     
(D) Left-most derivation in reverse
Answer: C
33.       In an absolute loading scheme, which loader function is accomplished by programmer?
(A) Allocation
(B) Linking
(C) Reallocation
(D) Both (A) and (B)
Answer: D
34.       Symbol table can be used for:
(A) Checking type compatibility
(B) Suppressing duplication of error message
(C) Storage allocation
(D) All of these above
Answer: D
35.       Moving process from main memory to disk is called:
(A) Caching
(B) Termination
(C) Swapping
(D) Interruption
Answer: C
36.       Part of a program where the shared memory is accessed and which should be executed indivisibly, is called:
(A) Semaphores
(B) Directory
(C) Critical Section
(D) Mutual exclusion
Answer: C
37.       Windows is a .................. operating system.
(A) Non pre-emptive
(B) Pre-emptive
(C) Multi-user
(D) Real time
Answer: C
38.       The “nice” command is used in Unix:
(A) to decrease the priority of a process
(B) to increase the priority of a process
(C) to get the highest priority
(D) nothing to do with the priorities
Answer: A, B
For Increase or decrease the priority of a job/Process we use Nice command, and its range -19 to 20.
If we need to increase the priority then we needs to decrease the priority number
If we need to decrease the priority then we needs to increase the priority number
Ex:- Nice -n 10 <cmd>
39.       Which page replacement policy suffers from Belady’s anomaly?
Answer: C
40.    Cache memory is:
(A) High Speed Register
(B) Low-Speed RAM
(C) Non-Volatile RAM
(D) High-Speed RAM
Answer: D

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