SumitM

16 years In IT | Author of a bestselling Java book | All Books links in the pinned tweet

[SumitM @SumitM_X]

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: https://t.co/NmsenbKiBW
Gumroad: https://t.co/atwlvncSfC
HARD COPY: https://t.co/4g8HokMOrg

Cracking the MERN Interviews:
Topmate: https://t.co/VTBIwkV1uE
Gumroad: https://t.co/SU2WydLBS4

Cracking The Reactjs Interviews:
Topmate: https://t.co/pblQZE0wxv
Gumroad: https://t.co/hQ9GUQ5fkt

Cracking The React Native Interviews:
Topmate: https://t.co/8uz0UT155l
Gumroad: https://t.co/dAKhnFyNeg

Bundle Offers: All in One Bundle (Java + Reactjs + MERN + React Native):
Topmate: https://t.co/bNb852skUN
Gumroad:https://t.co/ml6WGZtXCJ

(Java book pdf + Java Interviews in 2026 webinar Recording):

Topmate: https://t.co/yXPTA8d1QW

(Java + Reactjs + MERN):
Topmate: https://t.co/KmXTRrEEIp
Gumroad: https://t.co/4c2NC6XKTp

Reactjs + MERN Bundle:
Topmate: https://t.co/KmXTRrEEIp
Gumroad: https://t.co/4c2NC6XKTp

Java + MERN Bundle:
Topmate: https://t.co/LhhqW6lZUi
Gumroad: https://t.co/D1A1LoTvUQ

Java + Reactjs Bundle:
Topmate: https://t.co/38N8glwkd2
Gumroad: https://t.co/WOO8XA33kn

Thank you for your interest and support. 🙏

[SumitM @SumitM_X]

Do you use Claude for job search ?

[SumitM @SumitM_X]

@ConsciousRide 👍

[SumitM @SumitM_X]

You send a simple GET request…
All good...No issues...

You add one tiny header:
Authorization: Bearer token

Now see extra OPTIONS request ...

Where did this extra request come from and who asked for it?

[SumitM @SumitM_X]

Messages like these truly make all the effort worth it.

Nothing feels better than knowing your work is helping others grow in their careers 🙏

To everyone preparing : stay consistent, keep learning, and your time will come too .

[SumitM @SumitM_X]

@krunalbuilds 👍

[SumitM @SumitM_X]

Whats the difference between
http and https
apart from the security ??

[SumitM @SumitM_X]

@pnbindia PNB one app sucks..

doesnt even open

[SumitM @SumitM_X]

In interviews,
Dont just stop at what something does.
Always talk about why you used it.

Examples:

Q: Have you worked with Spring Boot Actuator?

Answer something like this :
"Yes, used it for health and metrics in production apps.

Enabled /health, /metrics, added a custom HealthIndicator for Redis, and exposed Prometheus-compatible metrics. Also secured the endpoints using Spring Security and profiles."

Q: What is @ SpringBootApplication?

Answer something like this:
"Its a combination of @ Configuration, @ ComponentScan, and @ EnableAutoConfiguration.

I have explored how auto-configuration works internally and have used exclusions like DataSourceAutoConfiguration when customizing DB setup."

[SumitM @SumitM_X]

Trust me this is not Chicago..

[SumitM @SumitM_X]

What is the difference between

git tag v1.0

vs

git branch v1.0

[SumitM @SumitM_X]

How Google Chrome restores all tabs after crash ?

[WIRED @WIRED]

Opal, the company famous for making a fancy webcam, has pivoted to making other consumer electronics. Fueled by big investments from OpenAI and Samsung, it’s working on an audio gadget first. https://t.co/IrIXTOKiCP

[SumitM @SumitM_X]

@sesigl 👍

[SumitM @SumitM_X]

As a backend dev,

You see this query pattern in logs:

GET /api/v1/items?sort=price&order=asc

Triggered 20K times per minute.

What are your next steps?

[SumitM @SumitM_X]

You have two tables: users and orders.

You need to fetch all users who have placed at least one order...

Which one would you use:

INNER JOIN

LEFT JOIN

EXISTS

[SumitM @SumitM_X]

Thanks for sharing your success stories 👍

A Product Based Company ✅️
NTTDATA ✅️
EPAM ✅️
IBM ✅️
Persistent Systems ✅️
KPIT ✅️
TCS ✅️
Deliote ✅️
Goldman Sachs ✅️

https://t.co/5ugulpRYC7

[SumitM @SumitM_X]

How many did Gitlab lay off ?

[SumitM @SumitM_X]

As a Java dev,

How many of the below concepts do you know ?

[SumitM @SumitM_X]

@AishwaryaDevv 🙂

[SumitM @SumitM_X]

What will happen if you put the return statement or System.exit () on the try or catch block?

Will finally block execute?