Computer Applications

  A History of Virus Detection: There are around a million different malware threats released online every single day. How does one keep up with such numbers? Ever since the dawn of the computer, we have had to deal with unethical individuals who like to create nasty viruses to wreak havoc on others. It may not be a new issue, but the craftiness and severity of these infections have only gotten worse over the years as newer technologies are being made available to the public. Anyone with a little know-how and the ability to follow instructions found online can deploy a nasty computer infection. There are three commonly known detection methods for infections known as signature-based, behavioral, and cloud-based. It is a constant uphill battle defending against known viruses and new ones alike, making this a monumental task to tackle. Signature-Based Detection: The most common method for detecting infections is known as signature-based protection. This type of detection tool ha...

  What Is a Computer Virus? Definition: A computer virus is a malicious application or authored code used to perform destructive activity on a device or local network. The code’s malicious activity could damage the local file system, steal data, interrupt services, download additional malware, or any other actions coded into the program by the malware author. Many viruses pretend to be legitimate programs to trick users into executing them on their device, delivering the computer virus payload. Types of Computer Viruses: Every virus has a payload that performs an action. The threat actor can code any malicious activity into the virus payload, including simple, innocuous pranks that don’t do any harm. While a few viruses have harmless payloads, most of them cause damage to the system and its data. There are nine main virus types, some of which could be packaged with other malware to increase the chance of infection and damage. The nine major categories for viruses are: 1. ...

 A pplications or Uses of computer system- Computers have become an essential part of modern human life. Since the invention of computer they have evolved in terms of increased computing power and decreased size. Owing to the widespread use of computers in every sphere, Life in today’s world would be unimaginable without computers. They have made human lives better and happier. There are many computer uses in different fields of work. Engineers, architects, jewellers, and filmmakers all use computers to design things. Teachers, writers, and most office workers use computers for research, word processing and emailing. Small businesses can use computers as a point of sale and for general record keeping. Here are the list of applications or uses of computer system- 1. Scientific Research Computer was first used to perform Scientific Research job, and it was the first application of computer. The accuracy and speed of computer enabled scientific analysis carried out too fast at...

 Classification of Computer The computer systems can be classified on the following basis: 1. On the basis of size. 2. On the basis of functionality. 3. On the basis of data handling.   Classification on the basis of size: Super computers: The super computers are the highest performing system. A supercomputer is a computer with a high level of performance compared to a general-purpose computer. The actual Performance of a supercomputer is measured in FLOPS instead of MIPS. All of the world’s fastest 500 supercomputers run Linux-based operating systems. Additional research is being conducted in China, the US, the EU, Taiwan and Japan to build even faster, higher performing and more technologically superior supercomputers. Supercomputers actually play an important role in the field of computation, and are used for intensive computation tasks in various fields, including quantum mechanics, weather forecasting, climate research, oil and gas exploration, molecular mode...

  What is Operating system? An Operating System performs all the basic tasks like managing files, processes, and memory. Thus operating system acts as the manager of all the resources, i.e.  resource manager . Thus, the operating system becomes an interface between user and machine.  Types of Operating Systems: 1.       Batch Processing 2.       Multiprogramming 3.       Time Sharing OS Batch Processing OS: This type of operating system does not interact with the computer directly. There is an operator which takes similar jobs having the same requirement and group them into batches. It is the responsibility of the operator to sort jobs with similar needs. Advantages of Batch Operating System:   It is very difficult to guess or know the time required for any job to complete. Processors of the batch systems know how long the job would be when it is in queue Multip...

  A Computer is an electronic device that can perform various operations of computation at a greater speed than what an ordinary machine or human mind can do. It is driven by many entities including the physical and tangible components that we can touch or feel, called the Hardware and programs and commands that drive the hardware, called the Software. The Software refers to the set of instructions fed in form of programs to govern the computer system and process the hardware components. For example: ·         The antivirus that we use to protect our computer system is a type of Software. ·         The media players that we use to play multimedia files such as movies, music etc. are Software. ·         The Microsoft Office we use to edit the documents is a Software. Depending on its use and area of implementation, Software’s can be divided into 3 major types: 1. ...