A couple of times I've had written tests, where I was given a pencil and paper, then left alone while I wrote out my answers. That worked really well both for

A couple of times I've had written tests, where I was given a pencil and paper, then left alone while I wrote out my answers. That worked really well both for me and for the interviewer. But I can only recall just two interviews that were conducted that way. In one of the tests, I was given the source to a C++ program and was asked to debug it. Note that I did not have a computer, only a hardcopy of the program source. That same test also gave me a hex dump of a network packet; I was required to reverse-engineer as much of the network protocol as I could. Another interviewer gave me a hardcopy that explained the assembly code of a hypothetical microprocessor - not one that actually existed, so I could not draw on previous knowledge of any specific processors. I was also supplied with the source of a program that was written in that same mythical CPU's assembler, with my requirement being to write down what it's output was. This last was actually quite difficult - I required several hours to come up with the program's output. I don't know whether I got the output correct, but I did get the job.