Preparing for the Civil Service Examination can be challenging, especially when it comes to memory retention. To enhance memory and retention for the UPSC IAS exam, candidates can utilize techniques such as active learning, visual aids, chunking information, mnemonic devices, frequent revision, practicing past papers, explaining concepts aloud, using technology wisely, active note-taking, and taking mock tests. Additionally, certain foods rich in antioxidants and brain-boosting nutrients can support cognitive function.