Lies and cheating is in any case Haraam, be it any other situation or when searching for employment. The Holy Prophet (Sallallahu alaihi wa sallam) said:
Translation of Hadith: Whoever cheats is not from us. (Sahih Muslim, Hadith No: 146)
Cheating for a job
Gaining employment through cheating or wrong means is impermissible and Haraam (forbidden), but the money earned from it is Halal.
The way if land is gotten through cheating and Salaat is offered on it, then the Salaat is valid but the sin of getting the land through wrong means still remains, in the same way employment gotten through cheating is wrong, but the money earned through it is Halal.
Cheating in exams
The reason behind organizing exams for the students of the schools, colleges, etc. is that they study the required syllabus and develop the requisite capability and erudition in the particular subject with their efforts. In this way, their educational standards are raised. Usually, in the form of the examination form, etc. the students are made to promise that they will follow the prescribed rules and regulations for the exam. Cheating in the exam in spite of all this is deceiving others. The Holy Prophet (Sallallahu alaihi wa sallam) said:
Translation of Hadith: Whoever deceived us is not of us.
There is a Hadith in Musnad Iman Ahmed bin Hambal:
Translation of Hadith: It is narrated on the authority of Anas (May Allah be well pleased with him), he says: The Holy Prophet (Sallallahu alaihi wa sallam) would usually tell us in every sermon of His: There is no Iman in the person who is not trustworthy and there is no religion in that person who does not keep a promise. (Musnad Iman Ahmed bin Hambal, Hadith No. 11935)
The word exam itself means to test and by cheating, this test does not remain a test. This is very harmful for the education of the students. In this age, Muslims should pay much more attention to education. Muslims students should demonstrate their high aims and progress in the field of education.