System Design Process Scalable Software Architecture Materials Cache Replication 3 Cache Update Methods Replication and Partition Sharding Scale Out Read-heavy and Write-heavy Workload Concurrent Request Handling Cache vs Session Store

Request Coordinating Data Models Replication How is data written How is data read Consistency Level DDL and DML UUID and TIMEUUID Data Types Data Replication in NoSQL Databases Explained Consistency of Cassandra What is Seed Node and Contact Point Hinted Handoff Advantage of Using Spark on Cassandra

RabbitMQ vs Kafka Apache Kafka Kafka Architecture Kafka Introduction Kafka Producer sync and async Kafka Partition vs Replication Example of Producer and Consumer

IOC container Dao Java example Cassandra Dao in Spring Boot Autowired v.s getBean Spring Annotation

Multi-thread and Executor Synchronization and Lock Atomic Variables and Data Structure How to Prevent Deadlock 2 Phase Lock and Commit Java 8 Lambda Tutorial Future vs CompletableFuture How to access the inner wrapped file in Class jar

Protocols WebSocket

Communication Methods Binder to Service AIDL Messenger Intent IPC Life Cycle Android HTTP Server Implicit intent v.s BroadcastReceiver IDL Looper, Handler and Thread

Object-Oriented (1) Object-Oriented (2) Object-Oriented (3) Prototype Object-Oriented (4) Inheritance Closure Asynchronous Avoiding Callback Hell in Node.js Node.js Callback Simple Example Module: Export and Import

What is ELK Stack

Interview Tips

Polymorphism

MySQL on OSX

Amazon EC2