Phone screen. Absolutely absurd questions to ask a programmer.
In the rare case you'd need to know something like the port number for SMTP, which I can't say I ever have, you'd just Google it.
I don't understand what they're doing or why they think this is a good way to evaluate people.
Port Numbers of SMTP, SSH, HTTP, etc.
Command to get the line count of a file in Linux.
Name the types of DNS records and their uses.
The following metrics were computed from 1 interview experience for the LinkedIn Full Stack Engineer role in San Francisco, California.
LinkedIn's interview process for their Full Stack Engineer roles in San Francisco, California is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for LinkedIn's Full Stack Engineer interview process in San Francisco, California.