One friend taking the place of another in a job competition

Question: If two friends enter a job competition and both meet the acceptance criteria, and one of them takes the test in place of the other, is that permissible if he is capable of performing the job? And is the salary permissible for him?

Answer: Such an action is not permissible because it involves lying and concealment of defects, and it opens the door for unqualified people to take on jobs through lying and deception regarding what is not permissible for them.