Internal fragmentation O Can be caused by padding for alignment purposes O None of these answers O Is hard to calculate since it depends on the pattern of future memory requests Occurs when there is enough aggregate heap memory, but no single free block is large enough O Promotes better memory utilization

Internal fragmentation O Can be caused by padding for alignment purposes O None of these answers O Is hard to calculate since it depends on the pattern of future memory requests Occurs when there is enough aggregate heap memory, but no single free block is large enough O Promotes better memory utilization

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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10. Cache replacement policies are necessary: A) to determine which cache mapping policy to use.B) to determine which block in cache should be the victim block.C) to decide where to put blocks when cache is empty.D) All of these are correct. 11. Cache memory is effective because: A) it is very inexpensive.B) it is very large.C) it is very small.D) of the principle of locality. I need it ASAP please no Explanation just A,B,C or D is enough please i only got 10 minute
An operating system follows a variable memory partitioning model. The system keeps track Question 31 of empty blocks in a linked list in the order of their address, where each node stores the size of next empty block in the memory. Say that current state of the memory is hold by the linked list shown below, which tells that there are currently four empty blocks in the memory, and the size of first block is 12 byte etc. 12 8 3 Assume that following memory block requests have been made in given order: 8 bytes, 2 bytes and 6 bytes. Draw the linked list to be changed after each block assignment by the following strategies; (a) First Fit (a) Best Fit
The Problem: You have a small class that is often allocated and freed from the heap. Your software is being slowed significantly by dynamic memory allocation calls. How can you make things go faster?
Computer Science 17. Tree-structured directory design does not allow us to create links for a file or folder. Group of answer choices True/False 18. With the same amount of total data access, processes with larger working sets tend to run faster. True/False 19. A cache miss means that the requested data is not stored in the cache and must be fetched from the hard drive before the program can proceed.
cache.xls (or it can be a google sheet that you share with me in a cache.txt with the url in it )= a spreadsheet showing the cycle counts of a cached and non-cached machine. Also, you need to show the cache as the memory accesses progress in your program marking the hits and misses (misses in RED). You should have cells to show how many hits and how many misses your program has, and details on what is the cache replacement policy you implemented. Here is code: void c_cache_for_badge() { int na = 8, nb = -3, nc = 10; // pointers int *npa; npa = (int*)malloc(sizeof(int)*84); // init integer pointers for(int i = 0; i < 84; i++) { npa[i] = i; } // integer pointers for(int i = 9; i < 70; i= i + 3) { nb += npa[i % 5] + npa[i % 3] + npa[i % 6]; } } void main() { c_cache_for_badge(); }
An operating system follows a variable memory partitioning model. The system keeps track of empty blocks in a linked list in the order of their address, where each node stores the size of next empty block in the memory. Say that current state of the memory is hold by the linked list shown below, which tells that there are currently four empty blocks in the memory, and the size of first block is 12 byte etc. Assume that following memory block requests have been made in given order: 8 bytes, 2 bytes and 6 bytes. Draw the linked list to be changed after each block assignment by the following strategies [12.5p each]; (a) First Fit (c) Best Fit
31 tn a twe-level cache system, the access times of L and la cche are I and ckek cycles, espectively. The mies penalty bum the La cache to mein memory is IR clock cycles. The miss rate of L cache is twike that of La The avermge memory eess tine (AMAT) of this Cnele system is 2 cycles. The mi rates of L and La respeetively are
Most systems allow programs to allocate more memory to its address space during execution. Data allocated in the heap segments of programs is an example of such allocated memory. What is required to support dynamic memory allocation in the following schemes: a. contiguous-memory allocation b. pure segmentation c. pure paging
Most systems allow programs to allocate more memory to its address space during execution. Data allocated in the heap segments of programs is an example of such allocated memory. What is required to support dynamic memory allocation in the following schemes: a. contiguous-memory allocation b. pure segmentation c. pure paging
Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory. This scheme permits the physical address space of a process to be non – contiguous. Given below is one of the page replacement algorithm program, you are to first identify which algorithm (FIFO, Optimal Page Replacement, Least frequently used) is implemented in given c-code. Please consider following reference string for this page replacement algorithm(1,2,3 5,1,3,4,5,6,1,5,3,2) with 4 page/frame size. There are some errors in this program, you have to correct it first, and then explain compiled output with each miss or hit condition. Note: Show complete procedure with detail steps/screenshots with your arid number. #include <stdio.h> void main() { intpos,c,m,maxi,i,k,nf,count,j=0,pf=0,np=0; printf("enter no. of pages"); scanf("%d",&np); int s[np]; printf("Enter pages sequence :\n");…
2. Briefly outline the idea of the BestFit memory allocation strategy in the context of a variable partitioning scheme and explain its disadvantages.
The following blocks are referenced by the CPU and to be fetched from the RAM to the cache sequentially: (i j k L L j m j n L m j m L k S j P i O k) Assume that the cache set is empty and all the above blocks can be inserted into the set. Use the LRU algorithm to fill in the following table that describes the status of the cache locations for each called block.