You work as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network.
You are creating a user account by using the USERADD command. Which of the following entries cannot be used for specifying a user ID?
Each correct answer represents a complete solution. Choose all that apply.

Which of the following standard technologies is not used to interface hard disk with the computer?

Adam works as a professional Computer Hacking Forensic Investigator. He has been assigned with a project to investigate a computer in the network of SecureEnet Inc. The compromised system runs on Windows operating system. Adam decides to use Helix Live for Windows to gather data and electronic evidences starting with retrieving volatile data and transferring it to server component via TCP/IP. Which of the following application software in Helix Windows Live will he use to retrieve volatile data and transfer it to the server component via TCP/IP?

Which of the following tools is used to restore deleted files from Linux and Mac OS X file system?

Which of the following methods can be used to start the Disk Defragmenter utility in Windows 9x?
Each correct answer represents a complete solution. Choose two.