Answer:
hardware and software is the answer
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Here are the main functions of an operating system:
1) Manage the resources of the device
The operating system controls how much of each resource is distributed, and it controls things like the processing unit and memory.
2) Establish a interface for the user of the device
The operating system must classify what the classes of the script/code have to do and what they implement.
3) Service application software
The operating system must service each application that is downloaded onto the device. It must balance it's use of storage between apps.
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Answer:
c. Two-factor authentication
Explanation:
Two-factor authentication is also known as 2FA. It is an extra form of security put in place aside the use of username and password to ensure the authenticity of someone trying to access an online platform with a registered account.
First the user enters his or her username and password, then they will also have to provide some extra information before finally gaining access. Such information could be ones place of birth, name of pet, something one has or know, etc.
2FA helps to still keep an account safe even if a device or password is been stolen. Two-factor authentication could be SMSbased, hardware token, software token, etc.