Shehan PW – Medium

Shehan PW

Shehan PW

10 Must-Know JavaScript Concepts for Acing Your Coding Interview

What is the difference between “undefined” and “null” in JavaScript?

4 min readMar 30, 2023

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10 Must-Know JavaScript Concepts for Acing Your Coding Interview

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Shehan PW

Building Reliable MongoDB Transactions with Atomicity and Rollbacks

In MongoDB, you can use a feature called “transactions” to perform multiple operations within a single transaction and ensure that if any…

2 min readMar 30, 2023

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Building Reliable MongoDB Transactions with Atomicity and Rollbacks

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Shehan PW

Ensuring Data Consistency in Multi-Document Operations with Locking and Transactions in MongoDB…

Understanding the Need for Locking and Transactions in MongoDB

3 min readMar 27, 2023

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Ensuring Data Consistency in Multi-Document Operations with Locking and Transactions in MongoDB…

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Shehan PW

SDLC (Software developement life cycle)

The Software Development Life Cycle (SDLC) is a well-established process that is used in the development of software systems. The SDLC is a…

8 min readMar 13, 2023

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SDLC (Software developement life cycle)

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Shehan PW

Authentication and Authorization work flows using java script for interviews

Types of authentication methods, oauth 2.0 standards, client browser storage security

10 min readMar 12, 2023

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Authentication and Authorization work flows using java script for interviews

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Shehan PW

Multi-threading and Asynchronous Programming in Java Script

non blocking I/O, event loop, async/await, callbacks, workers

6 min readMar 11, 2023

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Multi-threading and Asynchronous Programming in Java Script

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Shehan PW

What are design patterns in Software development?

An introduction to design patterns. why do we need them? are those important for the modern software development?

5 min readMar 11, 2023

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What are design patterns in Software development?

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Shehan PW

CAP theorem in system design

software engineering /software development theories

4 min readMar 10, 2023

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CAP theorem in system design

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Shehan PW

ACID Principals in Database Management Systems (DBMS)

(Examples in SQL

4 min readMar 10, 2023

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ACID Principals in Database Management Systems (DBMS)

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Shehan PW

SOLID principles in software development

Solid principles are a set of guidelines for software development that promote code readability, maintainability, and scalability. These…

8 min readMar 10, 2023

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SOLID principles in software development

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Shehan PW

Shehan PW

Full-stack web developer | Block-chain developer . (MERN stack && MARN stack). System Design and Development || NodeJS || JavaScript || Java || REACT || etc

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