Explain the difference between internal and external fragmentation Given six mem
ID: 3606448 • Letter: E
Question
Explain the difference between internal and external fragmentation Given six memory partitions of 300kB, 600kB, 350kB, 200kB, 750kB, and 125kB (in order), how would the first-fit, best-fit, and worst-fit algorithm place processes of size 115kB, 500kB, 358kB 200kB, and 375kB (in order)? Rank the algorithms in terms of how efficiently they use memory Assume a 1-KB page size, what are the page numbers and offsets for the following address references (provided as decimal numbers): a) 3085; b) 42095; c) 215201; d) 650000; e) 2000001 Consider a paging system with the page table stored in memory a) If a memory reference takes 50 nanoseconds (i.e. memory access time), how long does a 1. 2. 3. 4. paged memory reference take? b) If we add TLBs, and 75 percent of all page-table references are found in the TLBs, what is the effective memory reference time? . Consider the following segment table: Segment 0 Base 219 23000 Length 600 14 100 580 90 1327 1952 4 96 What are the physical addresses for the following logical addresses? a) 0, 430 b) 1,10 c) 2, 500 d) 3, 400 e) 4, 112Explanation / Answer
1)
INTERNAL FRAGMENTATION
It occurs while permanent sized memory block are owed toward the process.
It occurs at what time inconsistent size memory gap is owed to the procedure vigorously.
The memory has to be partition keen on changeable sized block and allocate the most excellent well block to the procedure.
Where in the external fragmentation in exhibits contraction, utterance and segmentation.
INTERNAL FRAGMENTATION
EXTERNAL FRAGMENTATIONIt occurs while permanent sized memory block are owed toward the process.
It occurs at what time inconsistent size memory gap is owed to the procedure vigorously.
Once the memory assign in the direction of the procedure is a little better than the memory request by the procedure this create frees break inside the owed block cause internal fragmentation. Once the procedure is detached starting the memory, it create the complimentary gap in the memory cause external fragmentation.The memory has to be partition keen on changeable sized block and allocate the most excellent well block to the procedure.
Where in the external fragmentation in exhibits contraction, utterance and segmentation.
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