I wonder how well the following exam would correlate to job performance: A completely fictitious language is developed. Simple enough that you can become fluen

I wonder how well the following exam would correlate to job performance: A completely fictitious language is developed. Simple enough that you can become fluent within an hour. From this you read a bunch of problems in said language and must solve them. A set of assertions about the problems are written down and you must verify them. Finally a full program, created from a dialect of the given language is given and you try to understand