What does the MX record do in a forward DNS zone?
a. It identifies the hostname and port of a computer that hosts a specific network service, such as FTP or SIP.
b. It identifies the authoritative name server for a domain.
c. It identifies the e-mail server to be used for e-mail traffic for the domain.
d. It holds the alternative names for a host.
ANSWER: c
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Write a program that reads a string from the keyboard and tests whether it contains a valid date. Display the date and a message that indicates whether it is valid. If it is not valid, also display a message explaining why it is not valid. The input date will have the format mm/dd/yyyy. A valid month value mm must be from 1 to 12 (January is 1). The day value dd must be from 1 to a value that is appropriate for the given month. September, April, June, and November each have 30 days. February has 28 days except for leap years when it has 29. The remaining months all have 31 days each. A leap year is any year that is divisible by 4 but not divisible by 100 unless it is also divisible by 400.
This project provides an opportunity to introduce format checking. The solution uses case logic in combination with compound Boolean expressions.
All of the following are examples of data types EXCEPT:
A) Date/Time. B) Currency. C) Noun. D) Number.
Why don’t most companies do full backup every night?
A. Full backups take a long time and thus companies usually only conduct full backups yearly. B. Full backups take a long time and thus companies usually only conduct full backups weekly. C. Full backups can't be restored. D. Full backups take a short time and thus companies usually only conduct full backups weekly.
Which of the following best describes the critical path of a project?
a. It is the date anentire project should be completed and operational—when the organization can expect to begin to reap the benefits of the project. b. It identifies the project activities that must be completed, the expected start and end dates, and what resources are assigned to each task. c. It is a critical date for completing a major part of aproject. d. It consists of all activities that, if delayed, would delay anentire project.