Computer and its components
Computer : Computer itself a combination of different type of separate electronic device. i.e. Computer only will be computer if it has INPUT DEVICE, PROCESS UNIT, and OUTPUT DEVICE.
Central Processing Unit (CPU) : It is heart and mind of the computer without this unit computer unable to process.
Keyboard : This is an input device which is used to input the data into the computer.
Mouse : This is also an input device which is used to input the data into the computer.
Monitor : This is an output device which is used to show the result of the instructions. There are variety of monitor available in the market such as, CRT Monitor, LCD Monitor, Touch Screen Monitor, TFT Monitor etc.
Switched Mode
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Compiler : This is also a convertor which converts whole high level language programme to low level language programme at a time.
Number System
Binary Number System : It has only base 2 i.e 0 and 1
Octal Number System : Base of octal is 8 i.e. 0, 1, 2, 3, 4, 5, 6, 7
Decimal Number System : Base of Decimal is 10 i.e. 0 1 2 3 4 5 6 7 8 9
Hexadecimal Number System : Base of this number system is 16 i.e. 0 1 2 3 4 5 6 7 8 9 A B C D E F
Operating System
Windows : This is an Proprietary Operating system and vendor is Microsoft. i.e. Windows 2007, Windows vista, Windows 2008 etc.
Linux : This is an open source Operating System such as ubuntu, fedora, debian, mandriva, centOS etc. Linux (Ubuntu ) Desktop Elements. File Management in Linux (Ubuntu)
Computer Security
Virus and worms : These are the computer programme which malfunction the computer system. Virus requires a carrier while worms does this by itself. Worm does not requires any carrier.
Spoofing : Through this, deceiving the computer users and making the fool.
Intrusion or Hacking : If a computer is used and controlled by unauthorised users then it is called hacking and who does this is called hacker. Main purpose of hacking to steal the private data or alter the actual data.
Denial of Services: The main aim of this attack is to bring down the targeted network and make it to deny the service for
2. Which of the following is an example of the hardware component of an information system?
Linux is an open source operating system based on UNIX. There are many types of Linux operating systems available today, but there were several resemblances between different Linux systems. All Linux systems use the Linux kernel. Deepin, Xubuntu, and Kubuntu are three of the many Linux distributions.
Input: An input is when a computer receives data from external hardware such as a mouse, keyboard
19. Some hardware can be added to the computer without having to restart or power down the computer. After a short period of time the device driver automatically loads and the hardware is available to applications and the user. This type of hardware is considered compatible with what type of technology?
Mouse is an input and pointing device that allows the user to control the graphical user interface. Keyboard is an input device that allows the user to input data and give commands to the operating system by typing. Commonly, a keyboard contains all the alphabetical letters, numbers from 1 to 9 and punctuation
Number is represented using the hexadecimal system. This system is a way to condense binary into smaller and more easy to work with pieces. There for every number has a hexadecimal code. The hexadecimal code for 589 is 24D. By doing this large numbers are
a. You input information perhaps via a keyboard or mouse to the computer and you receive output via a monitor or printer or some such device
The _________ is a term for the device or unit that receives the information transfer.
This output hardware sends information in the form of images, sound, or various other tangible imagery usually, to some form of input hardware on another system. It is not designed to receive data only to send. The most familiar of these devices is the visual display or computer monitor. These monitors are usually synonymous with a computer and every system is equipped with or able to connect to a Visual Display Unit. Projectors, audio systems, printers, and faxes are all examples of output hardware.
0 7 188 0.085 1,067 0.48 207 236 — 417 300 2.2 0.4 59.3 10.1 0.24 64.4 1,241 539 2.5 4,026 97,000 625 17 21 5 20 — 1,065 642 10,643 69
Viruses and worms are malicious programs that self-replicate on computers or through computer systems without the user being cognizant. Worms are a series programs that repeat themselves from system to system minus the use of a host fie. Worms use methods to infiltrate remote computers and launch replicas of themselves like email messages or coping files to an accessible disk. A computer virus is a
The operating system is an extremely crucial type of system software. It is the backbone of a computer. Without an operating system, our computers will not function properly. Operating systems are highly skilled software that includes programs with an ample amount of information. This information provided from these programs makes it easier for applications to communicate with the hardware. Linux and Windows are two operating systems that dominate in our society today. They are not only dominating in our society, but also in the business world. Windows and Linux are the two most popular
1. Software – is to a computer as brain is to a human body. Hardware is functioned by the software. It collects data, organizes them and carries procedures.
Outsider attackers often called hackers because they gain access to system without authorization or permission from the owners or legitimate user. With information technology, comes increase risk of fraud and information theft. Hackers can steel sensitive information from one organization and sell it to a
In order to store something in the main memory, it must first be input through the keyboard or mouse or other input device. A keyboard is designed to enter text, numbers, or punctuation. It is the main input device on most PC’s. The mouse is a pointing device used to select, point, and click on a computer screen. The keyboard and mouse are used to send information to the CPU. This information is translated through other devices called output devices such as the monitor. This