Trending @Infosys; Jl4A SAC to Jl5B Consultant

Do we have to clear any exam to get promoted from SAC to Consultant post ? Some people who joined with me from my MBA college in May 2022 as associate consultant got promoted to consultant this quarter. How much time do we have to stay at Jl4A to be promoted automatically to jl5 ? Kindly answer if anyone knows. Thankyou !!