When an Electric Current Is Passed Through a Tube Containing

question 40

Multiple Choice

When an electric current is passed through a tube containing helium,helium atoms absorb some of the electrical energy and reemit it as a ________ color.

• A) white
• B) yellow
• C) violet
• D) blue
• E) red

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Definitions:

Ifconfig

In Linux/Unix environments, a command that shows network interface information for Ethernet ports.

Disk Utility

A powerful application that manages disks and images in macOS. The utility can rename, reformat, erase, repair, and restore disks. It should be approached with caution because the wrong usage could delete all data on the system or on an attached external disk.

Time Machine

A bundled application in macOS that performs full and incremental system backups to an external hard drive. It gets its clever naming from the capability to navigate past backups as if traveling backward through time.

System Information

Detailed data regarding a computer's hardware and software configuration, often used for troubleshooting or system management purposes.