Using the fully qualified domain name (FQDN) of a networked computer, nslookup will query a DNS server and return the IP address that corresponds to that domain name.
The noun precedence pertains to ranking or status in order of importance or urgency. Examples: The medics treated them in order of precedence according to their. injuries.
Here's a ruby operator precedence table. See this question for another example using and/&&. Also, be aware of some nasty things that could happen: a = false || true => true a = false or true => false since = precedence is lower than || but higher than or.