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System Software and Operating System - Memory Management

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6. In real-time operating systems, which of the following is the most suitable scheduling scheme?

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7. Dirty bit is used to show the

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8. If there are 32 segments, each of size 1 K byte, then the logical address should have

  • Option : C
  • Explanation : To specify a particular segment, 5 bits are required (since 25 = 32). . Having selected a page, to select a particular byte one needs 10 bits (since 210 = 1 k byte). So, totally 5 + 10 =15 bits are needed.
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9. The first-fit, best-fit and the worst-fit algorithm can be used for

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10. Consider a computer with 8 Mbytes of main memory and a 128 K cache. The cache block size is 4 K. It uses a direct mapping scheme for cache management. How many different main memory blocks can map onto a given physical cache block ?

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