How to choose DB?

References: https://www.geeksforgeeks.org/real-time-application-of-data-structures/ https://www.programiz.com/dsa Arrays: Single Dimensional or Linear Arrays: Applications: a) For sorting data elements. b) Implement Stacks and Queues Multi Dimensional Arrays: Applications: a) Used for plotting graphs, and statistics and also to do scientific studies and research in almost different fields b) Best representation methods for plotting surveys c) Matrix Calculations…

Based on other references, link, books etc References: https://sourcemaking.com/design_patterns https://www.geeksforgeeks.org/design-patterns-set-1-introduction/ Creational Patterns: Singleton: Use cases a) One Paint Object to create lot of paintings. b) One Database connection object to interact with DB Factory: Use Cases a) If you are developing an application using SQL DB , but in the future need to…

How to check if events have reached event bridge or not? Event rules have been triggered or not? To see all the events reaching Event Bridge. I found a nice article: https://www.boyney.io/blog/2021-04-15-debug-eventbridge-events-with-cloudwatch This clearly explains how we can create a rule Ex:AllEventsRule and add a log group as a target. I think only step missed in that article are…

How do I create an event and trigger it at after a time period? Use case: Our POS system is integrated with an online delivery partner and we want to set busy mode for say next 30mins from now. Busy mode means, POS system won’t be able to receive any order…

based on the article https://www.geeksforgeeks.org/when-to-use-usecallback-usememo-and-useeffect/ Technical terms to understand first before jumping into understanding these features in React: Referential equality In javascript, functions are objects, therefore even when they share the same code, they are two different objects. Ex: // doubleFactory is a function that returns another function function doubleFactory(){…

Server Side Caching A good example by AWS Document: Link 1) Remote caches A remote cache (or side cache) is a separate instance (or separate instances) dedicated for storing the cached data in-memory. Remote caches are stored on dedicated servers and are typically built on key/value NoSQL stores, such as Redis and Memcached…

First time, I’m going to write a non-technical blog and the motivation behind this article is my year end reviews so far. There are few categories of tech people I have met during my professional career. Category 1: Very hardworking, committed ,fully focused and technology driven. Category 2: 8 hours…

New Announcements Introduction: Currently I’m working as a Solutions Architect in Till,Australia and we are heavily using AWS services especially the serverless stack, DynamoDB, ECS, Cloudwatch etc. …

Techniques to test your web page using Node js selenium web driver. 1) Go to an html page: await driver.get(‘https://xy.pyq.com'); 2) Wait till you find an element using placeholder value: await driver.wait(until.elementLocated(By.xpath(“//input[@placeholder=’username@example.com’]”),2000)); Note: 2000 is milliseconds it can wait for max. 3) Write values to an input box: await element.sendKeys(‘my name);