1.Define system software and identify the two types of system software.
answer:
System software is computer software designed to operate the computer hardware and to provide a platform for running application software.
Software is generally divided into:
| |
| Systems software are programs which help in the running of a computer system. Some examples are..
| |
| Applications software are programs which perform specific tasks for the user. Some examples are...
|
answer:
Windows Server- a brand name for a group of server operating systems released by Microsoft Corporation. All are part of Microsoft Servers. This brand includes the following software:
- Windows Server 2003
- Windows Server 2008
- Windows HPC Server 2008, an edition designed exclusively for high-performance computing
- Windows Server 2008 R2, the current release of Windows Server 2008
- Windows Small Business Server, an operating system based on Windows Server with some integrated Microsoft Servers, for small businesses
- Windows Essential Business Server, a product similar to Small Business Server, but for medium-sized businesses
- Windows Home Server, a home server operating system for file sharing and streaming, automated backups, and remote access
- Windows Home Server 2011, a home server operating system designed for Small Office/Home Office (SOHO)
- Windows MultiPoint Server, a product allowing multiple simultaneous local users.
UNIX- In addition to being a stand-alone operating system, UNIX also is a server operating system.That is, UNIX is capable of handling a high volume of transactions in a multiuser environment and working with multiple processors using multiprocessing. For this reason, some computer professionals call UNIX a multipurpose operating system because it is both a stand-alone and server operating system. Many Web servers use UNIX as their operating system.
Linux- Some network servers use Linux as their operating system. Thus, Linux also is a multipurpose administrator can configure the network, administer security, run a Web server, and process e-mail. Clients on the network can run Linux, UNIX, or Windows. Distributions of Linux include the Mozilla Web browser. operating system. With Linux, a network
Solaris- Solaris, a version of UNIX developed by Sun Microsystems, is a server operating system designed specifically for e-commerce applications. Solaris manages high-traffic accounts and incorporates security necessary for Web transactions. Client computers often use a desktop program, such as GNOME desktop, that communicates with the Solaris operating system.
NetWare- Novell’s NetWare is a server operating system designed for client/server networks. NetWare has a server portion that resides on the network server and a client portion that resides on each client computer connected to the network. NetWare supports open source software and runs on all types of computers from mainframes to personal computers.
3.Summarize the features of several embedded operating systems: Windows Embedded CE, Windows Mobile, Palm OS, iPhone OS, BlackBerry, Google Android, Embedded Linux, and Symbian OS.
answer:
Microsoft Windows CE (now officially known as Windows Embedded Compact and previously also known as Windows Embedded CE , and sometimes abbreviated WinCE) is an operating system developed by Microsoft for embedded systems. Windows CE is a distinct operating system and kernel, rather than a trimmed-down version of desktop Windows. It is not to be confused with Windows Embedded Standard which is an NT-based componentized version of desktop Microsoft Windows.
Windows Mobile is a mobile operating system developed by Microsoft that was used in smartphones and mobile devices, but by 2011 was rarely supplied on new phones. The last version is "Windows Mobile 6.5.5"; it is superseded by Windows Phone 7, which does not run Windows Mobile software. Unlike operating systems for desktop computers, it is usually not possible to upgrade the operating system on a Microsoft based mobile phone via official and legal means, even by a later release of the same basic operating system let alone a different one; hardware replacement is the only way for less popular and older devices.
Palm OS (also known as Garnet OS) is a mobile operating system initially developed by Palm, Inc., for personal digital assistants (PDAs) in 1996. Palm OS is designed for ease of use with a touchscreen-based graphical user interface. It is provided with a suite of basic applications for personal information management. Later versions of the OS have been extended to support smartphones. Several other licensees have manufactured devices powered by Palm OS.
iOS (known as iPhone OS before June 2010) is Apple's mobile operating system. Originally developed for the iPhone, it has since been extended to support other Apple devices such as the iPod touch, iPad and Apple TV. Apple doesn't license iOS for installation on third-party hardware. As of May 31, 2011, Apple's App Store contains more than 500,000 iOS applications, which have collectively been downloaded more than 15 billion times. In the last quarter of 2010, it had a 26% share of the smartphone operating system market in terms of units sold, behind Google's Android and Nokia's Symbian.As of May 2010, it accounted for 59% of mobile web consumption—not including the iPad—in North America.
BlackBerry is a line of mobile e-mail and smartphone devices developed and designed by Research In Motion (RIM) since 1999.BlackBerry phones function as a personal digital assistant and portable media player. They are primarily known for their ability to send and receive (push) Internet e-mail wherever mobile network service coverage is present, or through Wi-Fi connectivity. They support a large array of instant messaging features, including BlackBerry Messenger.
Android is a software stack for mobile devices that includes an operating system, middleware and key applications.Google Inc. purchased the initial developer of the software, Android Inc., in 2005.Android's mobile operating system is based on the Linux kernel. Google and other members of the Open Handset Alliance collaborated on Android's development and release. The Android Open Source Project (AOSP) is tasked with the maintenance and further development of Android. Android was listed as the best-selling Smartphone platform world-wide in Q4 2010 by Canalys.
Embedded Linux is the use of Linux in embedded computer systems such as mobile phones, personal digital assistants, media players, set-top boxes, and other consumer electronics devices, networking equipment, machine control, industrial automation, navigation equipment and medical instruments. According to survey conducted by Venture Development Corporation, Linux was used by 18% of embedded engineers.
Symbian is a mobile operating system (OS) and computing platform designed for smartphones and currently maintained by Nokia. The Symbian platform is the successor to Symbian OS and Nokia Series 60; unlike Symbian OS, which needed an additional user interface system, Symbian includes a user interface component based on S60 5th Edition. The latest version, Symbian^3, was officially released in Q4 2010, first used in the Nokia N8. Symbian OS was originally developed by Symbian Ltd.It is a descendant of Psion's EPOC and runs exclusively on ARM processors, although an unreleased x86 port existed.
4.Explain the purpose of several utility programs: file manager, search utility, image viewer, uninstaller, disk cleanup, disk defragmenter, backup and restore utilities, screen saver, personal firewall, antivirus programs, spyware and adware removers, Internet filters, file compression, media player, disc burning, and personal computer maintenance.
answer:
Spyware is a type of malware that can be installed on computers, and which collects small pieces of information about users without their knowledge. The presence of spyware is typically hidden from the user, and can be difficult to detect. Typically, spyware is secretly installed on the user's personal computer. Sometimes, however, spywares such as keyloggers are installed by the owner of a shared, corporate, or public computer on purpose in order to secretly monitor other users.
A file manager or file browser is a computer program that provides a user interface to work with file systems. The most common operations performed on files or groups of files are: create, open, edit, view, print, play, rename, move, copy, delete, search/find, and modify attributes, properties and permissions. Files are typically displayed in a hierarchy. Some file managers contain features inspired by web browsers, including forward and back navigational buttons.
Search Utility - Ultra File Search is a Search Utility which is able to find quickly Files, Folders and Text on your Local, Network, DVD, CD-ROM, USB Hard or Flash Drives. Ultra File Search allows you to specify several File Mask and multiple Drives and/or Folders at the same time; it is able to sort out files and folders according to their properties (e.g. Modified Date) and find files which contain one or more specific words or sentences.
An image viewer or image browser is a computer program that can display stored graphical image; it can often handle various graphics file formats. Such software usually renders the image according to properties of the display such as color depth, display resolution, and color profile.
An uninstaller, also called a deinstaller, is a utility software designed to remove other software or parts of it from a computer. It is the opposite of an installer.
Disk Cleanup (cleanmgr.exe) is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files.
Defragmentation is the process of locating the noncontiguous fragments of data into which a computer file may be divided as it is stored on a hard disk, and rearranging the fragments and restoring them into fewer fragments or into the whole file. Defragmentation reduces data access time and allows storage to be used more efficiently.
backup or the process of backing up refers to making copies of data so that these additional copies may be used to restore the original after a data loss event.Backups have two distinct purposes. The primary purpose is to recover data as a reaction to data loss, be it by data deletion or corrupted data. Data loss is a very common experience of computer users. 67% of internet users have suffered serious data loss. The secondary purpose of backups is to recover data from a historical period of time within the constraints of a user-defined data retention policy, typically configured within a backup application for how long copies of data are required.
A screensaver is a type of computer program initially designed to prevent phosphor burn-in on CRT and plasma computer monitors by blanking the screen or filling it with moving images or patterns when the computer is not in use. Contemporary screensavers are used primarily for entertainment or security.
A personal firewall is an application which controls network traffic to and from a computer, permitting or denying communications based on a security policy.A personal firewall differs from a conventional firewall in terms of scale. Personal firewalls are typically designed for use by end-users. As a result, a personal firewall will usually protect only the computer on which it is installed.
Antivirus or anti-virus software is used to prevent, detect, and remove malware, including but not limited to computer viruses, computer worm, trojan horses, spyware and adware. This page talks about the software used for the prevention and removal of such threats, rather than computer security implemented by software methods.
Spyware is a type of malware that can be installed on computers, and which collects small pieces of information about users without their knowledge. The presence of spyware is typically hidden from the user, and can be difficult to detect. Typically, spyware is secretly installed on the user's personal computer. Sometimes, however, spywares such as keyloggers are installed by the owner of a shared, corporate, or public computer on purpose in order to secretly monitor other users.
Internet filtering refers to blocking undesirable content on the Internet. It helps you filter and deny access to any unwanted material. The person who sets up the filter provides a system to block certain data. It may include advertising, a virus, sexual content, file transfer, or other offensive material. When a user makes a request for a Web page that has been blocked, the Internet filter keeps the request from being completed. It either blocks it completely or redirects it to another location.
data compression, source coding or bit-rate reduction is the process of encoding information using fewer bits than the original representation would use. Compression is useful because it helps reduce the consumption of expensive resources, such as hard disk space or transmission bandwidth. On the downside, compressed data must be decompressed to be used, and this extra processing may be detrimental to some applications.
Media player can refer to:
- Media player (application software)
- Data storage devices that play media and content:
- HD media player
- Mobile Digital Media Player (M-DMP)
- Portable media player
Optical disc authoring, including DVD and Blu-ray Disc authoring (often referred to colloquially as burning), is the process of assembling source material—video, audio or other data—into the proper logical volume format to then be recorded ("burned") onto an optical disc (typically a compact disc or DVD).
Good PC maintenance involves a number of different jobs, from keeping your keyboard and mouse clean, to cleaning up your hard drive by removing temporary files.The frequency of the maintenance will depend on how often the computer is used. Basic maintenance, such as wiping over the keyboard and the screen should be done as often as possible, at least once a week for computers that are used daily.
No comments:
Post a Comment