What is the purpose of signature files used to secure mobile devices and operating systems?

What is the purpose of signature files used to secure mobile devices and operating systems?

  • They contain a record of historical and pending firmware and software updates.
  • They contain a list of all user passwords.
  • They contain a log of digital certificates and encryption keys associated with the user.
  • They contain sample code from known viruses and malware that is used by security software to identify malicious software.
    Explanation:

    Antivirus and antimalware software compare the contents of a disk with sample virus and malware code included in signature files. If a comparison is found, the user can be notified and the virus can be isolated or removed.