When you select a worksheet that is part of a group, [Group] displays in the title bar

Joe, a customer, requests that the desktop system he is buying is able to be used at his vacation home in another country, as well as his regular home. The technician is aware that the country mentioned has different power requirements. Which of the following should the technician ensure the desktop contains?

A. Dual voltage options B. UPS C. Inverter D. Micro-ATX connector

It’s recommended that you do not explicitly create and use Thread objects to implement concurrency, but rather use the ________ interface.

a. ExecutorService b. Runnable c. Concurrent d. Executor