GATE CSE Memory Management & Virtual Memory – OS Practice Test

GATE CSE Memory Management & Virtual Memory – OS Practice Test | Set 1

Questions 76-80 of 100

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Question 76

MSQ · Multiple Correct 2 mark

Which factors directly influence the Effective Memory Access Time (EMAT) in a paged virtual memory system with TLB?

A TLB Search Access Speed B Main Memory Access Time C Page Fault Service Time and Page Fault Rate D TLB Hit Ratio

Question 77

MSQ · Multiple Correct 2 mark

Which of the following are characteristics of the INVERTED PAGE TABLE?

A It eliminates internal fragmentation completely. B Address translation requires searching by PID and Page Number. C One table entry exists per physical frame in main memory. D The table size is independent of the number of virtual pages or running processes.

Question 78

MSQ · Multiple Correct 2 mark

Which of the following conditions describe THRASHING in an operating system?

A CPU utilization drops near zero while disk I/O utilization approaches 100% B Processes spend more time swapping pages than executing instructions C High page fault rate across running processes D Total size of working sets of active processes exceeds total available physical frames

Question 79

MSQ · Multiple Correct 2 mark

Which of the following memory allocation algorithms search the entire free memory list during block assignment?

A Next-Fit B Best-Fit C First-Fit D Worst-Fit

Question 80

MSQ · Multiple Correct 2 mark

Which of the following statements regarding the TLB (Translation Lookaside Buffer) are CORRECT?

A On a TLB miss, page table access in main memory is required. B TLB completely replaces the requirement for main memory page tables. C TLB flush or ASID (Address Space Identifier) tag check is needed on context switch. D TLB is a fast associative hardware cache inside the MMU.