The base element must be placed within the ________ element

A technician troubleshooting a mail server determines that the server is low on available hard drive space and needs an additional hard drive installed. The server will need to be offline for the hardware installation. Which of the following troubleshooting steps should the technician do NEXT?

A. Notify impacted users of the scheduled maintenance. B. Implement one change at a time. C. Collect additional information. D. Document findings, actions, and outcomes.

Which of the following is a not a member function of queue?

a. enqueue b. pop c. empty d. size