Question

Is their anyone who can explain the meaning of this?
The use of text lingo in the selection process is akin to wearing flip flops and shorts to an interview, the applicant might be more comfortable, but in almost all cases it would be inappropriate.

Answer 1

It is like "wearing flip-flops and shorts to an interview, the applicant might be more comfortable, but in almost all cases it would be inappropriate."

In simpler terms, even though the writer might use "text lingo" with great comfort, he/she should not use it because it is too informal and inappropriate (like wearing flip-flops and shorts to an interview).