Answer:
a. True
b. False
Explanation:
b. False
At the initial stage, the certificate needs to be encrypted not by the public key of certifier.com but by the by the private key of certifier.com.
After which, the certificate which contains lots information, (i.e there's more information in the certificate than just the public key to be certified). The certificate also the CA’s information, the certificate expiration date, etc.
Only this information’s digital fingerprint is encrypted by the certifier.com’s private key.
Answer:
B. Computer operating system
Explanation:
the operating system (or OS) manages all of the hardware and software in the computer, and allows hardware and software to communicate.
We can also figure this out by process of elimination: Application software is just a fancy way to say apps, Graphical User Interface (or GUI) are menus that allow a user to use the computer through a visual representation (what you interact with using your mouse), and microcomputer just means a small computer like a laptop or a phone.
<u>The Virus:</u>
A virus can be defined as a malicious program, that breaks into the computer without the consent of the user and sometimes even without the knowledge of the user. Viruses are also of different types and categories.
There are certain kinds of malware and spyware that enter a computer and start encrypting the user's data. Generally, a user gets to know about the existence of a virus when the computer programs begin to misbehave. Some files get corrupted and the user can't access them anymore.
Some files and programs may also get deleted as if they weren't even present on the system. But in case someone has installed good anti-virus software, they will get a notification as soon as some file containing some kind of virus enters the computer.
Answer:
Explanation:
The necessary hardware components that a computer requires to run properly are the following.
Motherboard, this is the main circuit board that interconnects all of the components and allows them to interact with each other.
CPU, this is the brain of the computer where all calculations and processes are handled.
Video Card, this component handles all the visual data, rendering that the computer needs in order to get a proper image.
RAM, these components are the physical memory where temporary data is stored and used.
Hard Disk, this is the main storage drive where all your data will be saved including the operating system.
PSU, this is the power supply of the unit that distributes the correct amount of power to every other component in the system.
Sound Card, this component handles all the input and ouput audio signals for a computer.
