Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target. You may return the…
Month: November 2023
Data Placement Strategies in Distributed System
In distributed systems, data placement is crucial for balancing load, optimizing performance, and ensuring fault tolerance. Besides consistent hashing, which is widely used for its uniformity and minimal reshuffling of data upon…
Models to Manage and Coordinate Components
In a distributed system, there are different architectural models used to manage and coordinate the multiple components that form the system. Here, we’ll discuss three common models: Clustering Management, Peer-to-Peer (P2P), and…
Database Master -Slave Replication
Database master-slave replication is a common method for ensuring data redundancy, load balancing, and high availability in database management systems. Here’s a simplified overview of how it works: The exact implementation details…
Make Each Payment Unique
Making online payments unique and idempotent is crucial to ensure that each transaction is processed only once and to prevent duplicate charges. Here are some strategies to achieve this: By combining these…
Race Condition
A race condition is a type of computing problem that occurs in software when two or more processes access shared data at the same time and at least one of them modifies…
System Design – Designing a “Like” Button
Designing a “Like” button system capable of handling a high volume of likes (increment operations) from individual users, while ensuring thread safety and real-time updates, requires a robust and scalable architecture. Let’s…
Compare Kafka with RabbitMQ
Apache Kafka and RabbitMQ are both popular message brokers, but they have different architectures and are designed for different use cases. Here are some key differences: 1. **Architecture**: – **Kafka**: Designed as…
Dynamic Programming
Dynamic programming (DP) is a method for solving a complex problem by breaking it down into simpler subproblems. It’s used in a variety of contexts in computer science and mathematics. Here are…
Understand Transaction in Database
In computing, a transaction typically refers to a group of operations that are executed as a single unit. The concept is widely used in database management systems and other applications where data…