Memory Allocation Now we will discuss about the various memory allocation schemes. Single Partition Allocation In this scheme Operating system is residing in low memory and user processes are executing in higher memory. Advantages * It is simple. * It is easy to understand and use. Disadvantages * It leads to poor utilization of processor and memory. * Users job is limited to the size of available memory. Multiple-partition Allocation One of the simplest methods
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instructions or data for a possible processing and its storage is temporally.it holds a list of instructions of an information that is currently working.it can be accessed randomly‚ it means that it does not have to look in the storage device (hard disk) from the start to find a piece of interest [23]. When we switch off the computer any storage within the RAM‚ will be erased that is why we say the storage is temporally. RAM is the main memory because we can quickly access any files in the
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Introduction of Computers What is Computer. Computer is an electronic machine‚ which accepts instructions‚ commands and information‚ based on the information process the given information at Ultra High Speed and produce the result on the screen and printer. Qualities of Computer. Possess the following:- a. Ultra High Speed b. Accuracy c. Huge Capacity for Storage d. Decision Making Ability Main Parts of Computers. Following are the main parts
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ITD 1213 Hardware Systems Grade _______ Instructor: Mike. Pierce Steven Harmon: Research Computer Components: Due Date: 09/17/2011 Research Computer Components The Five Components of the PC are: 1. System Unit - The main part of a personal computer. The system unit includes the chassis‚ microprocessor‚ main memory‚ bus‚ and ports‚ but does not include the keyboard or monitor‚ or any peripheral devices. A system unit is sometimes called a box or main unit. 2. Monitor - A
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GLOSSARY WORD DEFINITION Address The identification of a particular location in memory where a data item or instruction is stored. Algorithm A sequence of instructions which rigorously defines a solution to a problem. Antiglare screen A polarized screen attached to the front of the monitor‚ which reduces eye strain. Assembler A program which converts ASSEMBLY LANGUAGE into MACHINE CODE to be used by a computer. Automation Computer control of machines
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The latest Symantec Internet Security Threat Report identified over 1.6 million instances of “malicious code” (worms and viruses) in 2008‚ a 165% increase over 2007. A worm is a program that copies itself repeatedly into a computer’s memory or onto a disk drive. Sometimes it will copy itself so often it will cause a computer to crash. Among some famous worms are Code Red‚ Nimda‚ Klez‚ Sasser‚ Bagle‚ Blaster‚ Sobig‚ and Melissa. The 2002 worm Klez‚ dubbed the most common worm ever‚ spread its damage
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Data Recovery Book V1.0 (Visit http://www.easeus.com for more information) DATA RECOVERY BOOK V1.0 FOREWORD ---------------------------------------------------------------------------------------------------------------------The core of information age is the information technology‚ while the core of the information technology consists in the information process and storage. Along with the rapid development of the information and the popularization of the personal computer‚ people find information
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1. Which of the following will not retain data after the computer is turned off? a. DVD *b. RAM c. ROM d. hard drive 2. These computers are refrigerator-sized machines‚ and are commonly found in various departments throughout large companies. *a. minicomputer b. mainframe computer c. supercomputer d. microcomputer 3. Name the program that coordinates computer resources‚ provides an interface between users and the computer‚ and runs applications
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are often comprised with some or all of the below components (hardware). As technology advances‚ older technologies such as the floppy disk drive and Zip drive (both shown below) are no longer required or included with computers. Example of front of computer case Bay Case or Chassis Optical drive: Blu-ray‚ CD-ROM‚ CD-R‚ CD-RW‚ or DVD CPU (processor) Floppy disk drive Hard drive Keyboard Memory (RAM) Microphone Monitor‚ LCD‚ or other display device Motherboard Mouse Printer Sound
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of Hard Drives The hard disk drive was invented by some IBM engineers working under Rey Johnson at IBM in San Jose‚ CA‚ in about 1952 to 1954. In 1965 a number of engineers left IBM (they were known as the "dirty dozen" within IBM) and founded Memorex. Al Shugart‚ one of them‚ later left Memorex and founded first Shugart Associates where the 5 1/4" floppy disk drive was a major product‚ then Seagate Technology‚ which effectively started today’s industry of small hard disk drives. The early drives
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