cs1101_09A_lec05 - CS1101 Lec05 Software Dr. Jiying Wang...

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CS1101 Lec05 - Software Dr. Jiying Wang Semester A, 2009-10 Computer Science Department City University of Hong Kong
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CS1101 - Lec05 2 Objectives Describe two fundamental types of software and their relationship Describe the role and main functions of the operating system in a computer  Describe the term user interface Explain the purpose of the following utilities: backup, system restore, file  compression, uninstaller, disk defragmenter, and screen saver Identify various operating systems Identify the categories of application software and give examples on each  category
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CS1101 - Lec05 3 Lec05-Q1:  explain why Windows can support PnP, i.e., the addition of a new  device without requiring reconfiguration or manual installation of device  drivers? Lec05-Q2:  given the files and folder in slide 15, assuming the working directory  now is "C:\WP\Backup", what is the relative path of "Myfile.txt"?  Lec05-Q3:  make a list of 6 file extensions you find in a computer that you use  most often. Explain each of the extensions are for what type of files E.g., .exe - for executable files For you to explore after class
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CS1101 - Lec05 4 Software Software  - series of instructions that tell a computer what to do and how to do it Also called a  program - A key feature of computer programs is that they can be run or executed Software is "soft" - Hardware is physically there, can be touched A software program usually consists of an executable file  plus several supporting  programs and supporting data files  The extension of a file usually tells what kind of file it is, for example, .ext, .dll,  .dat, .doc, .txt
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CS1101 - Lec05 5 Types of Software System software Programs that control the operations  of the computer, and serves as the  interface between the user, the  application software and the  computer hardware Application software   The purpose of application software  is to help user perform a specific task E.g., word processing, game playing,  e-mail, web browsing …
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CS1101 - Lec05 6 Operating System Operating system Type of software that acts as the master controller  for all activities  that take place  within a computer system Hardware + OS sometimes called  platform , providing the infrastructure for  application software OS acts as an  interface between the  hardware and the  application software
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CS1101 - Lec05 7 Utility Programs to Enhancing an OS utility program  is a kind of system software that performs maintenance-type  tasks.  For example, Backup utility - Copies selected files or entire hard disk onto another disk or tape (often compressed to save 
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This note was uploaded on 03/10/2012 for the course CS 1101 taught by Professor Drxue during the Spring '11 term at City University of Hong Kong.

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cs1101_09A_lec05 - CS1101 Lec05 Software Dr. Jiying Wang...

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