Senior Coding Practice

High-signal challenges focused on production-grade concerns: concurrency, scalability, and operational reality.

Master the Top 150 Interview Problems

Practice the most common interview questions with our integrated Python environment. Included progressive hints, tutorials, and instant code execution.

Start Coding Sprints

def twoSum(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        complement = target - num
        if complement in seen:
            return [seen[complement], i]
        seen[num] = i

Thread-Safe LRU Cache

Hash MapDoubly Linked ListMutex/Locking

View Framework

Design and implement a Least Recently Used (LRU) cache that is safe for concurrent access by multiple threads.

Scale It

What if the cache needs to store millions of items? Consider sharded locks to reduce contention.

Concurrency

Discuss the trade-offs between a single global lock vs. fine-grained locking or lock-free approaches.

Production

How do you monitor hit/miss ratios? Would you use a circular buffer for tracking recent access in a concurrent environment?

Frequently Asked At

GoogleMetaAmazon

Senior Coding Practice

Master the Top 150 Interview Problems

Thread-Safe LRU Cache

Distributed Task Dependency Resolver

Token Bucket Rate Limiter

High-Performance Binary Parser

Consistent Hashing with Virtual Nodes

Thread-Safe LRU Cache

Scale It

Concurrency

Production