How to practice coding interviews

Random grinding feels productive and still fails when you never re-solve, never talk out loud, and never time yourself. A workable plan is a curated list, a weekday cadence, and a readiness bar you can actually measure.

The big idea

Blind 75 and NeetCode 150 cover high-frequency patterns without requiring 500 random easy problems. Prefer ordered roadmaps over "sort by acceptance rate."

Walking through a cadence

For someone with a full-time job:

• Weekdays: 1 focused medium (45–60 minutes including review)
• Weekends: 2–3 problems or one timed 2-problem set
• Every Sunday: re-solve 3 old problems cold

Spaced repetition: revisit tough problems after 1 day, 3 days and 1 week. Keep a personal cheat sheet of triggers, not code dumps. Three lines per pattern beat a repo of solutions you cannot regenerate under stress.

Readiness heuristic used by many successful candidates: you can solve an unseen medium in about 20–25 minutes with a correct approach most of the time. That is a probability, not a guarantee — question variance is real.

Practice communication the same days you practice code. Record a two-minute approach. Do a mock where the interviewer asks "what did you do next?" If you only type silently at home, the onsite will feel like a different sport.

NeetCode's own framing after hundreds of problems is pattern recognition plus a practical readiness bar, not a streak counter.

Common mistakes

• Volume without re-solves. You have seen 300 problems and cannot regenerate 30.
• Acceptance-rate shopping. Ordered roadmaps cover triggers; random easy problems do not.
• Silent solo practice. The onsite grades talking.

Check yourself

1. You have four weeks and a job. Do you finish NeetCode 150 hards or re-solve mediums?

Re-solve graphs, intervals, windows and medium DP. Skip niche hards if you are time-boxed.

2. What readiness bar is worth tracking?

Unseen mediums in about 20–25 minutes with a correct approach, most of the time — a probability, not a promise.

Key takeaways

• Curated lists beat random volume; re-solves beat first-time greens.
• A weekday medium plus Sunday cold reviews fits a full-time job.
• Readiness ≈ unseen mediums in ~25 minutes, plus talking out loud.

Further learning

NeetCode roadmapPractice coding interviews with structured courses, AI-assisted assessments, head-to-head Versus mode, and 1,000+ problems.NeetCode Tech Interview HandbookFree curated interview preparation materials for busy peopletechinterviewhandbook.org

NeetCode on pattern recognition and a practical readiness bar:

Next: common mistakes.