I'm about to start my second year of a Computer Science degree, and I feel like I've fallen behind. I passed introductory courses covering Python, C, C++, and Java/OOP, but because I haven't used those concepts consistently, I've forgotten much of what I learned.
I learn best with a fixed routine and a small number of reliable resources. I'd rather follow one well-structured book or course for each subject, study regularly, and complete exercises and projects instead of jumping between random videos.
If you were starting over as a sophomore, how would you rebuild your fundamentals over the next year? I'm especially interested in a sensible order for studying data structures and algorithms, operating systems, computer networks, computer architecture, databases, Linux, and introductory cybersecurity.
I'd also like advice on dealing with forgetting. Is it normal to lose confidence with material after a few months, and how do experienced engineers retain useful knowledge without memorizing everything?
Would it be worthwhile to gain a broad understanding of the major areas of computer science before specializing, or should I choose one direction sooner? Also, is NeetCode mainly useful for interview preparation, or can it help build fundamentals? Should I study algorithms from a course or textbook first?
I'd appreciate practical advice from anyone who once felt behind but eventually became a competent engineer.
4 Answers
Broad knowledge is useful early because it helps you understand how different parts of computing fit together, but you don’t need expert-level depth in every area. Spend a few weeks getting oriented in each major subject, then choose one direction based on your interests and available courses.
Also, don’t compare yourself with people who appear to be progressing faster. A consistent schedule helps, but it cannot replace genuine practice. Pick a realistic weekly plan, stay with it for several months, and measure progress by what you can build, explain, and debug.
Start with the prerequisites in your degree plan instead of inventing an unrelated roadmap. Most programs are designed so programming fundamentals lead into data structures, which then support databases, operating systems, and networking. Studying those subjects in that order will make the material reinforce itself.
You should already be comfortable with basic types, control flow, functions, arrays and lists, and the differences between references, pointers, and value types where relevant. Review anything weak, but don’t spend an entire year passively repeating old coursework. Build small programs and debug them line by line so the ideas become usable.
You’re not late; forgetting material you haven’t practiced is completely normal. Pick one main language and become comfortable with its syntax, debugging tools, breakpoints, watches, and reading error messages instead of constantly switching languages.
For resources, a structured algorithms course such as Princeton’s Algorithms course can provide the foundation before using NeetCode. NeetCode is primarily interview preparation, so it works better after you understand the underlying data structures and algorithms. For the broader subjects, choose one respected textbook or course per topic and finish it rather than collecting resources. A broad pass through the major areas over a year is useful, but plan to specialize afterward.
That makes sense. I’m realizing I need to separate learning the concepts from practicing interview problems, and I should probably use projects to make the knowledge stick.
A good routine is to study one subject at a time, then apply it immediately. For example, choose a structured programming or backend course, complete its exercises, and build two or three small projects using what you learned. Projects expose gaps much faster than watching more lectures, and they teach you how to debug and finish something end to end.
You don’t need to memorize every detail. Keep concise notes, use spaced review, revisit concepts when a project requires them, and practice explaining them from memory. The goal is to know what a tool or concept is for and where to look up exact syntax—not to reproduce an entire textbook.
Redoing a course can be worthwhile if you genuinely lack the prerequisites, but simply rereading notes for the same grade won’t help much. Use exercises and a project to test whether you can actually apply the material.