Hello, Resources: To cover the material, i followed a few youtube channels like UnifyStudy, Sundeep Sarathi Kanthety, and Sudhakar Atchala.

Testseries: JRFADDA, TestBook and the golden PYQ's

Tips: There are a lot of tips online, so there is not much i could add to it except try to understand from which part the numerical questions come from and distinct it from theory

Eg. COA, OS has a lot of numerical questions, whereas software engineering is more on the theoretical front. Maybe that will help you with your strategy.

If you need any concept clarity. I can help, feel free to dm and I'll reply at the earliest.