A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer files or Windows registry entries. Viruses can cause widespread damage, including loss of data, decreased system performance, and even system crashes.
Viruses are often spread through email attachments, downloads from unknown or unreliable websites, or through infected USB drives. They can also be inadvertently installed when software is not properly updated.
There are a number of measures you can take to protect your computer from viruses, including using a reputable antivirus program, installing software updates as they become available, and being careful about where you download files from.
Contents
What is called a computer virus?
A computer virus is a type of malicious software program that, once installed on a computer, can replicate itself and spread to other computers. The main purpose of a computer virus is to harm the computer or its user.
Computer viruses can be spread in a number of ways, including through email attachments, infected software programs, or websites that have been compromised by hackers. Once a computer is infected, the virus can do a variety of things, including deleting files, crashing the computer, or stealing personal information.
There are many different types of computer viruses, and they can be very difficult to detect and remove. It is important to keep your computer’s security software up-to-date and to be vigilant about avoiding suspicious email attachments and websites.
What is computer virus and examples?
What is a computer virus?
A computer virus is a type of malicious software program that, once installed on a computer, can replicate itself and spread to other computers. Viruses can cause all sorts of problems on a computer, including data loss, system crashes and reduced performance.
What are some common examples of computer viruses?
Some of the most common computer viruses include the following:
-The Melissa virus: A virus that was first detected in 1999. It spread through email messages, and caused systems to crash when the messages were opened.
-The Love Bug virus: A virus that was discovered in 2000. It spread through email messages, and caused systems to crash when the messages were opened.
-The Sasser virus: A virus that was first detected in 2004. It spread through the Internet, and caused systems to crash when the virus infected them.
-The Conficker virus: A virus that was first detected in 2008. It infected millions of computers worldwide, and caused systems to crash when the virus infected them.
What is computer virus Mcq?
What is computer virus Mcq?
A computer virus is a type of malicious software that, once installed on a computer, can replicate itself and spread to other computers. It can also damage or disable the computers it infects.
A computer virus is typically spread through email attachments, downloads from the internet, or infected USB drives. It can also be spread through malicious websites.
Once a computer is infected with a virus, the virus can do a variety of things, including:
-Corrupt or delete files
-Slow down the computer
-Redirect web browsers to malicious websites
-Display unwanted advertisements
-Steal personal information
There are many different types of computer viruses, and they can be very difficult to remove. The best way to protect your computer from viruses is to install antivirus software and keep it up to date.
Why computer virus is called so?
There are many reasons why computer viruses are called so. The first and most obvious reason is that they infect and spread like viruses do in the natural world. Just as a cold or the flu can make you sick and spread to other people, computer viruses can do the same to your computer.
But computer viruses can also be incredibly destructive. They can damage or even wipe out your files, or cause your computer to crash. They can even steal your personal information. This is why many people refer to computer viruses as digital pests or malware.
Another reason why computer viruses are called so is that they can be incredibly hard to get rid of. Just as a cold or the flu can linger for weeks or even months, computer viruses can be very difficult to get rid of and can sometimes come back even after you think you’ve gotten rid of them.
So why are computer viruses called so? There are many reasons, but the most common one is that they spread and act like viruses do in the natural world, and they can be incredibly destructive and hard to get rid of.
What is first computer virus?
The first computer virus was created in 1971 by Bob Thomas, a programmer at BBN Technologies. The virus, called Creeper, was designed to move between computers on the ARPANET, the predecessor of the internet. Creeper was not designed to cause harm, but simply to display the message “I’m the creeper, catch me if you can.”
In 1972, a second virus called Reaper was created in response to Creeper. Reaper was designed to delete Creeper and any other files it came across.
The first virus to cause actual harm was the Elk Cloner virus, which was created in 1982. Elk Cloner infected Apple II computers and displayed a message that read “Elk Cloner: The program with a personality.” The virus also copied itself to floppy disks, which could then infect other computers.
Today, computer viruses are a common form of malware, and can cause a wide range of damage to computers and networks. Some common symptoms of a virus infection include unexpected or unexplained changes to your computer’s behaviour, slowed performance, and the appearance of unexpected or unwanted files or programs.
What are the 3 types of viruses?
There are three types of viruses:
1. DNA viruses: These viruses have DNA as their genetic material. Examples include herpes, adenoviruses, and papillomaviruses.
2. RNA viruses: These viruses have RNA as their genetic material. Examples include polio, rabies, and influenza viruses.
3. retroviruses: These viruses have RNA as their genetic material, but they also have an enzyme called reverse transcriptase. This enzyme allows the virus to convert its RNA into DNA, which can then be incorporated into the host’s DNA. Examples of retroviruses include HIV and hepatitis C viruses.
What are the types of viruses?
There are many types of viruses, and they can be classified in many ways. The following are some of the most common ways to classify viruses:
By structure:
Viruses can be classified by their structure, which can be either naked or enveloped. Naked viruses are viruses that do not have a protective coat around them. Enveloped viruses are viruses that have a protective coat around them.
By replication method:
Viruses can be classified by their replication method, which can be either vegetative or lytic. Vegetative viruses are viruses that can replicate inside of a cell without causing that cell to die. Lytic viruses are viruses that kill the cell they replicate in, which in turn causes the cell to release new viruses.
By host:
Viruses can also be classified by their host, which can be either a plant or an animal.
By genome:
Viruses can also be classified by their genome, which can be either DNA or RNA.
