CompTIA 220-801 Certification Practice Test

Answer - B - SCR is an executable file type. It holds a screensaver application.

Key Takeaway: One should not open any unknown attachments in an e-mail. Hackers can send any file by renaming or changing its actual extension. For example, any executable file can be sent by a different extension. SCR is an extension for a screen saver, which is an executable file. Opening unknown executable files can pose a very high security risk. Take extra caution before you open a SCR extension file.