What is a companion computer virus?

A companion virus is a computer virus that stores itself in a file that is named similar to another program file that is commonly executed. When that file is executed, the virus will infect the computer or perform malicious steps such as deleting the files on your computer hard drive.

Besides, what is the phage virus?

Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Félix d’Hérelle in France (1917).

What is an armored virus?

A type of virus that has been designed to thwart attempts by analysts from examining its code by using various methods to make tracing, disassembling and reverse engineering more difficult. An Armored Virus may also protect itself from antivirus programs, making it more difficult to trace.

What is a non resident virus?

A non-resident virus is a computer virus that does not store or execute itself from the computer memory. Executable viruses are an example of a non resident virus.

What is the directory virus?

a piece of code that is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data. Virus definition. They infect the computer’s directory by changing the path indicating file location. They are usually located in the disk but affect the entire directory.

What is a file infecting virus?

A file-infecting virus is a type of malware that infects executable files with the intent to cause permanent damage or make them unusable. A file-infecting virus overwrites code or inserts infected code into a executable file.

What is the definition of stealth virus?

A stealth virus is a hidden computer virus that attacks operating system processes and averts typical anti-virus or anti-malware scans. Stealth viruses hide in files, partitions and boot sectors and are adept at deliberately avoiding detection.

What is a network virus?

A network virus has the ability to quickly degrade the performance of a network, totally disabling critical devices, programs and network connections. Viruses that use network protocols to spread and infect other computers on a computer network are called worms.

What is a cluster virus?

A cluster virus is a type of virus that ties its own execution to the execution of various software programs. These viruses typically work by changing directory or registry entries so that when someone starts a program, the virus will start as well.

What is a drive by download?

A drive-by download refers to the unintentional download of a virus or malicious software (malware) onto your computer or mobile device. A drive-by download will usually take advantage of (or “exploit”) a browser, app, or operating system that is out of date and has a security flaw.

What is the meaning of boot sector viruses?

A boot sector virus is a type of virus that infects the boot sector of floppy disks or the Master Boot Record (MBR) of hard disks (some infect the boot sector of the hard disk instead of the MBR). While boot sector viruses infect at a BIOS level, they use DOS commands to spread to other floppy disks.

What is a boot sector virus example?

Boot Sector viruses: The boot sector is the first software loaded onto your computer. An example of a boot sector virus is Parity Boot. This virus’s payload displays the message PARITY CHECK and freezes the operating system, rendering the computer useless.

What is to boot a computer?

Booting is a startup sequence that starts the operating system of a computer when it is turned on. A boot sequence is the initial set of operations that the computer performs when it is switched on. Every computer has a boot sequence.

What happens when you start a computer?

The first thing a computer has to do when it is turned on is start up a special program called an operating system. The BIOS chip tells it to look in a fixed place, usually on the lowest-numbered hard disk (the boot disk) for a special program called a boot loader (under Linux the boot loader is called Grub or LILO).

What are the two types of booting?

Restarting a computer or its operating system software. It is of two types (1) Cold booting: when the computer is started after having been switched off. (2) Warm booting: when the operating system alone is restarted (without being switched off) after a system crash or ‘freeze.’

What is shutting down the computer?

To shut down or power off a computer is to remove power from a computer’s main components in a controlled way. After a computer is shut down, main components such as CPUs, RAM modules and hard disk drives are powered down, although some internal components, such as an internal clock, may retain power.

What is the booting process?

Booting is a startup sequence that starts the operating system of a computer when it is turned on. A boot sequence is the initial set of operations that the computer performs when it is switched on. Every computer has a boot sequence.

How does a BIOS work on a computer?

BIOS is a firmware, in short. It is stored on a chip on the part of the computer motherboard and is basically, a set of instructions that run to help load the operating system. You OS would fail to load, if not for the BIOS! When you turn on the computer, BIOS instructions are initiated.

What is the first step of the boot process?

When an x86 computer is booted, the processor looks at the end of system memory for the Basic Input/Output System or BIOS program and runs it. The BIOS controls not only the first step of the boot process, but also provides the lowest level interface to peripheral devices.

What is the meaning of cold boot?

To perform a cold boot (also called a “hard boot”) means to start up a computer that is turned off. It is often used in contrast to a warm boot, which refers to restarting a computer once it has been turned on. A cold boot is typically performed by pressing the power button on the computer.

What is a boot system?

To boot (as a verb; also “to boot up”) a computer is to load an operating system into the computer’s main memory or random access memory (RAM). Once the operating system is loaded (and, for example, on a PC, you see the initial Windows or Mac desktop screen), it’s ready for users to run applications.

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