A small hidden design flaw, vulnerabilities or a bug in the code could result in a back door for a hacker. As humans writing code for application there is a possibility of mistakes been made and secure coding guidelines not followed. Hence getting the code review before systems go live and before major changes put live is essential.

Code reviews means exactly what its name suggest reviewing the code base of a software. Code reviews helps to improve the quality of the Source Code and ensure that there is no way an attacker can get into the system through the weaknesses in the code written.

The whole source code is reviewed by clearing out garbage, suggesting solutions or corrective actions for the mistakes and issues found.