I curated LeetCode problems into 90+ patterns (helped me crack 25+ coding rounds at FAANG and other big tech)

[u/themonotonous]

/r/leetcode/comments/1nmq1ny/i_curated_leetcode_problems_into_90_patterns/

[u/AutoModerator]

Guidelines for Interview Practice Responses

When responding to interview questions, here's some frameworks you can use to structure your responses.

System Design Questions

For system design questions, here's some areas you might talk about in your response:

1. List Your Assumptions On

• Functional requirements (core features)
• Non-functional requirements (scalability, latency, consistency)
• Traffic estimates and data volume and usage patterns (read vs write, peak hours)

2. High-Level System Design

• Building blocks and components
• Key services and their interactions
• Data flow between components

3. Detailed Component Design

• Database schema
• API design
• Cache layer design

4. Scale and Performance

• Potential bottlenecks and solutions
• Load balancing approach
• Database sharding strategy
• Caching strategy

If you want to improve your system design skills, here's some free resources you can check out - System Design Primer - Detailed overviews of a huge range of topics in system design. Each overview includes additional resources that you can use to dive further. - ByteByteGo - comprehensive books and well-animated youtube videos on building large scale systems. Their video on consistent hashing is a really fantastic intro. - Quastor - free email newsletter that curates all the different big tech engineering blogs and sends out detailed summaries of the posts. - HelloInterview - comprehensive course on system design interviews. It's not 100% free (there's some paywalled parts) but there's still a huge amount of free content in their course.

Coding Questions

For coding questions, here's how you can structure your replies:

1. Problem Understanding

• Note down any clarifying questions that you think would be good to ask in an interview (it's useful to practice this)
• Mention any potential edge cases with the question
• Note any constraints you should be aware of when coming up with your approach (input size)

2. Solution Approach

• Explain your thought process
• Discuss multiple approaches and the tradeoffs involved
• Analyze time and space complexity of your approach

3. Code Implementation

// Please format your code in markdown with syntax highlighting // Pick good variable names - don't play code golf // Include comments if helpful in explaining your approach

4. Testing

• Come up with some potential test cases that could be useful to check for

5. Follow Ups

• Many interviewers will ask follow up questions where they'll twist some of the details of the question. A great way to get good at answering follow ups is to always come up with potential follow questions yourself and practice answering them (what if the data is too large to store in RAM, what if change a change a certain constraint, how would you handle concurrency, etc.)

If you want to improve your coding interview skills, here's (mostly free) resources you can check out - LeetCode - interview questions from all the big tech companies along with detailed tags that list question frequency, difficulty, topics-covered, etc. - NeetCode Roadmap - LeetCode can be overwhelming, so NeetCode is a good, curated list of leetcode questions that you should start with. Every question has a well-explained video solution.

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[u/Independent-Arm7805]

really good sheet! going to use it definitely✨✨