Re: Never trust a CV
An interview and a test are required...
I used to give a technical quiz when interviewing potential candidates back in the 90s. The first question was:
Write a C++ class that stores a signed 32-bit integer. Include member functions to change and retrieve the stored value.
About half the people we interviewed couldn't even do that.
The questions became progressively harder from there. I dread to think what the Stack Overflow Brigade would make of them today.