A few things I want to touch upon, I believe these were the reasons for ME not qualifying prelims.
1. Lack of consistency: CSE is a marathon, demands rigorous preparation. This exam is not for people who study as per their moods. You have to turn up every single day.
2. Material collection: Many of us keep on collecting new materials. There are a lot of materials/lectures available in market. Have trust in your sources. Don't run after everything available, it will only confuse you.
3. Prelims is a game of elimination, practice is key here. Just merely reading books or watching lectures won't help, solve ample questions to get a hold on the concepts/topics.
4. Solve at-least one test series completely with PYQs. Many go with vision. Even Vajiram & Forum are also very good.
My Best wishes for CSE 2025. Make it count. ๐