How is the difficulty level of the exam considered when determining passing marks for Master Cadre in Punjab?

Hello, My name is Nimrat I’m preparing for the Master Cadre exam in Punjab and I’m curious about how the difficulty level of the exam is taken into consideration when determining passing marks. Could you provide detailed insights into the process? Are there specific criteria or methods used to adjust passing marks based on the difficulty of the exam? Additionally, how does the examination authority ensure fairness and consistency in this regard?