Frequently Asked Questions
Everything you need to know about LeetCode interview prep and using LeetTracker
How do I prepare for a coding interview?
The most effective way to prepare for coding interviews is to practice solving algorithmic problems regularly. Start with a curated list like NeetCode 150, Grind 75, or Sean Prashad's patterns, which cover the most important patterns and problem types. Focus on understanding the underlying concepts rather than memorizing solutions. Use LeetTracker to track your progress and identify weak areas that need more practice.
What is NeetCode 150?
NeetCode 150 is a curated list of 150 LeetCode problems created by NeetCode (a popular coding interview prep channel). The list covers all essential data structures and algorithms patterns needed for technical interviews, including arrays, trees, graphs, dynamic programming, and more. It's considered one of the most comprehensive lists for interview preparation.
What is Grind 75?
Grind 75 is a curated list of 75 LeetCode problems created by the team behind Blind 75. It's designed for engineers with limited time who want to focus on the highest-impact problems. The list is ordered by difficulty and can be customized based on your available study time. Many consider it the optimal list for time-constrained interview prep.
What is Blind 75?
Blind 75 is the original viral list of 75 LeetCode problems that became famous on the Blind app (an anonymous professional network). It was created by a Facebook engineer and covers the core patterns you need to know for FAANG interviews. While Grind 75 is its more refined successor, Blind 75 remains popular and effective.
What is Sean Prashad's list?
Sean Prashad's list is a comprehensive collection of LeetCode problems organized by patterns. It's widely used by candidates to master specific algorithmic techniques like sliding window, two pointers, and various tree traversals. It provides a structured roadmap for someone wanting to go deep into algorithm patterns.
Should I do NeetCode 150 or Grind 75?
It depends on your timeline and experience level. If you have 2-3 months to prepare and want comprehensive coverage, NeetCode 150 is excellent. If you have less time (4-8 weeks) or are reviewing before an interview, Grind 75 is more focused. Many people do Grind 75 first, then expand to NeetCode 150 or Sean Prashad's list if they have more time. LeetTracker lets you track all these lists simultaneously.
How many LeetCode problems should I solve?
Quality matters more than quantity. Solving 100-150 problems with deep understanding is better than rushing through 500. Focus on understanding patterns: if you can recognize that a problem uses two pointers or dynamic programming, you can apply that pattern to new problems. Track your progress by topic to ensure you're covering all important areas.
How long does it take to prepare for coding interviews?
Preparation time varies based on your background. Engineers with strong CS fundamentals might need 4-8 weeks. Those new to algorithms might need 3-6 months. A good benchmark is being able to solve medium-difficulty problems in 20-30 minutes. Consistency is key - solving 2-3 problems daily is more effective than cramming on weekends.
What topics should I focus on for coding interviews?
The most commonly tested topics are: Arrays & Hashing, Two Pointers, Sliding Window, Binary Search, Trees, Graphs, Dynamic Programming, and Backtracking. LeetTracker organizes problems by topic and shows your completion percentage for each, helping you identify gaps in your preparation.
Does LeetTracker save my progress?
Yes! Your progress is automatically saved in your browser's local storage. This means your data stays on your device, is completely private, and persists across sessions. No account or sign-up is required. Your progress will remain even if you close the browser, though clearing browser data will reset it.
Is LeetTracker free?
Yes, LeetTracker is completely free to use. There are no premium features, no ads, and no data collection. It's a tool built to help the developer community prepare for coding interviews more effectively.
How does the random problem picker work?
The random problem picker selects from your uncompleted problems. You can customize it to prefer harder problems (Medium/Hard) or focus on your weak topics based on completion percentages. This helps ensure you're always challenged and working on areas that need improvement.
What is the best way to use LeetTracker?
Start by selecting a problem list (NeetCode 150 or Grind 75) using the filters. Work through problems by topic to build pattern recognition. Use the random picker when you want variety. Check the Topics section to see your radar chart and identify weak areas. Track your daily streak to stay consistent with your practice.
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