Operating System Basics Questions and Answers

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Q481
Thrashing
  • A reduces page I/O
  • B Decrease the degree of multi-programming
  • C Implies execessive page I/O
  • D Improve the system performance
Answer: Option C
Q482
Dirty bit for a page in a page table
  • A helps avoid unnecessary writes on a paging device
  • B helps maintain LRU information
  • C allows only read on a page
  • D none of the above
Answer: Option A
Q483
A set of resources allocations such that the system can allocatte resources to each process is some order, and still avoid a dead lock is called
  • A unsafe state
  • B safe state
  • C Starvation
  • D Greedy allocation
Answer: Option B
Q484
A disk sheduling algorithm in an operating system causes the disk arm to seek back and forth access the disc surface servicing all request in its path, this is a
  • A first come first served
  • B shortest seek time first
  • C scan
  • D None of these
Answer: Option C
Q485
An attached processor
  • A is used one only a few computers
  • B causes all processor to function equally
  • C is more difficult to implement than a co-processor
  • D is used only for limited, specific functions
Answer: Option D
Q486
Process is
  • A a program in high level language kept on disk
  • B contents of main memory
  • C a program in execution
  • D a job in secondary memory
Answer: Option C
Q487
Situations where two or more processes are reading or writing some shared data and the final result depends on who runs precisely whch are called
  • A race condition
  • B critical sections
  • C mutual exclusions
  • D message passing
Answer: Option A
Q488
Producer consumer problem can be solved using
  • A Semaphores
  • B Event counters
  • C Monitors
  • D All of the above
Answer: Option D
Q489
The strategy of allowing process that are logically run able to be temporarily suspended is called
  • A preemptive scheduling
  • B Non premptive scheduing
  • C Shortest job first
  • D First come first served
Answer: Option A
Q490
Moving process from main memory to disk is called
  • A Scheduing
  • B Cache
  • C Swapping
  • D Spooling
Answer: Option C

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