SumitM

I have launched four digital products via Topmate and Gumroad so far . Given the constant inquiries through DMs for purchase links, I have decided to consolidate all relevant links in one place for your convenience. Individual Products: Cracking The Java Interview With Sumit: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/qturr HARD COPY: store.pothi.com/book/sumit-m-c… Cracking the MERN Interviews: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/imzsr Cracking The Reactjs Interviews: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/qqheh Cracking The React Native Interviews: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/yakhkx Bundle Offers: All in One Bundle (Java + Reactjs + MERN + React Native): Topmate: topmate.io/interviewswith… Gumroad:msumit.gumroad.com/l/ypbkul (Java book pdf + Java Interviews in 2026 webinar Recording): Topmate: topmate.io/interviewswith… (Java + Reactjs + MERN): Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/rikeb Reactjs + MERN Bundle: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/rikeb Java + MERN Bundle: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/psdfn Java + Reactjs Bundle: Topmate: topmate.io/interviewswith… Gumroad: msumit.gumroad.com/l/gvabt Thank you for your interest and support. 🙏

Group bullies in office are the weakest people...

As a developer, Have you ever wondered : WHY downloading 1GB is fast but uploading 1GB feels slower?

Got this message today and it truly made my day. Cracking 5 offers including Goldman Sachs with a 100% hike is no small feat. This is exactly why I started writing: to simplify tough concepts and give devs the confidence to walk into interviews prepared. Thank you 🙏 and Wishing you more success ahead !

One good interview can change your life...

@Hiteshdotcom Is that Telusko ?

Say Hi if you catch me up here

France or Spain ?

GET was working and POST failing with CORS... Tech Lead said CORS isn't needed for GET thats why ... Is the Tech Lead correct or is there some other reason ?

Can an exception be thrown from the static block?

I know a 3 years experienced guys getting 48 LPA ... And also a TCS top performers who reached ~12 LPA in 7 years ...

Java + Reactjs - still the best Full stack combo for Job opportunites..

Very few can explain the difference between : git reset --soft git reset --mixed git reset --hard

Tech Lead says : "password is safe when base64 encoded...." Do you feel safe with this Tech Lead?

Tech Lead says: "DELETE should always .. always return the deleted object." Whats your reply ?

As a Java Dev, do you know the Difference Between Shallow Copy vs Deep Copy? You’re copying an object, but are you copying the object or just the pointer?

Your microservice owns its DB. You did a small schema change which is now breaking 3 other services. What went wrong and what architectural smell is this? And what's your next step ?

Preparing for Microservices Interviews? Don’t miss these 5 Transaction & Consistency terms: 1. Saga (Choreography / Orchestration) 2. TCC (Try-Confirm-Cancel) 3. 2PC (Two-Phase Commit) 4. Idempotency 5. Eventual Consistency

What is the difference between git tag And git branch ?

Amdocs ✅️

@codersidd ✅️

@SumitM_X It's the Decorator Pattern. ​Just like a classic decorator wraps an object to dynamically add behavior without altering the base class, an HOC wraps a React component to inject props or state.

As a React developer , if you have been using Higher Order Components (HOCs) in React, you have unknowingly used one of the most classic design patterns in software engineering... Do you know which one ?

@codersidd 👍

@SumitM_X Bookmarking this for quick reference!

As a backend developer, if asked - What is the difference between an API Gateway and a Load Balancer? Cover these points: 1. What is a Load Balancer? Imagine you have 3 copies of the same app running. A Load Balancer sits in front and distributes user traffic evenly to all 3. It makes sure no single app is overloaded. If one app crashes, it skips that and sends traffic to the others. Purpose: Distribute load across multiple same servers Common in monolithic or replicated service setups 2. What is an API Gateway? Now imagine you have different microservices: /login → Login Service /orders → Order Service /cart → Cart Service An API Gateway acts as a single entry point. It checks the path and routes to the right service. It also does authentication, logging, rate limits, etc. Purpose: Route traffic to different services, add features Common in microservice architecture 3. Can they be used together? Yes! You first hit the API Gateway Then inside, it may use a Load Balancer to talk to multiple instances of one microservice.