C191 – Module 3: Memory Management – Flashcards
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_____ is the method of binding instructions and data to memory performed by most general-purpose operating systems.
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Execution time binding
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In systems that support virtual memory, ____.
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physical memory is separated from logical memory
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An address generated by a CPU is referred to as a ____.
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logical address
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Suppose a program is operating with execution-time binding and the physical address generated is 300. The relocation register is set to 100. What is the corresponding logical address?
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200
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Belady's anomaly states that ____.
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for some page replacement algorithms, the page fault rate may increase as the number of allocated frames increases
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_____ is the dynamic storage allocation algorithm that results in the smallest leftover hole in memory.
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Best-fit
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Optimal page replacement ____.
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is used mostly for comparison with other page replacement schemes
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_____ is the dynamic storage allocation algorithm that results in the largest leftover hole in memory.
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Worst-fit
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A(n) ____ page table has one page entry for each real page (or frame) of memory.
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inverted
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The ____ is the number of entries in the TLB multiplied by the page size.
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TLB reach
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Consider a logical address with a page size of 8 KB. How many bits must be used to represent the page offset in the logical address?
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13
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________ allows the parent and child processes to initially share the same pages, but when either process modifies a page, a copy of the shared page is created.
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Copy-on-write
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_____ is the algorithm implemented on most systems.
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LRU
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_____ occurs when a process spends more time paging than executing.
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Thrashing
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Which of the following statements is false with regard to Solaris memory management?
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The speed at which pages are examined (the scan rate) is constant.
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With segmentation, a logical address consists of _____.
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segment number and offset
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Which of the following statements is false with regard to allocating kernel memory?
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Because the kernel requests memory of varying sizes, some of which may be quite small, the system does not have to be concerned about wasting memory.
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Which of the following data structures is appropriate for placing into its own segment?
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heap, kernel code and data, user code and data
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______ allows a portion of a virtual address space to be logically associated with a file.
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Memory mapping
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A(n) ______ matches the process with each entry in the TLB.
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address space identifier
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Systems in which memory access times vary significantly are known as __________.
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non-uniform memory access
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Which of the following statements is true with respect to hashed page tables?
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They are a common approach for handling address spaces larger than 32 bits.
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Which of the following is considered a benefit when using the slab allocator?
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There is no memory fragmentation.
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Which of the following is not a reason explaining why mobile devices generally do not support swapping?
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small size of mobile applications do not require use of swap space
