When total memory space exists to satisfy a request (process size) but it is notcontiguous, this is called:O A. Internal fragmentationO B. External fragmentationO C. CompactionO D. PagingNext ageJump to...O.S. Structures ►

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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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Suggest the situation where write() and read() are preferred over get() and put() for file I/O operations. Supportyour answer with examples
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code in java or c language
. Q: In this problem you are to compare reading a file using a single-threaded file server and a multithreaded server. It takes 15 msec to get a request for work, dispatch it, and do the rest of the necessary processing, assuming that the data needed are in a cache in main memory. If a disk operation is needed, as is the case one-third of the time, an additional 75 msec is required, during which time the thread sleeps. How many requests/sec can the server handle if it is single threaded? If it is multithreaded?
. Q: In this problem you are to compare reading a file using a single-threaded file server and a multithreaded server. It takes 15 msec to get a request for work, dispatch it, and do the rest of the necessary processing, assuming that the data needed are in a cache in main memory. If a disk operation is needed, as is the case one-third of the time, an additional 75 msec is required, during which time the thread sleeps. How many requests/sec can the server handle if it is single threaded? If it is multithreaded?
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List and briefly describe some of the defenses against buffer overflows that can be used when compiling new programs.

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When total memory space exists to satisfy a request (process size) but it is no contiguous, this is called: O A. Internal fragmentation O B. External fragmentation O C. Compaction O D. Paging