DEV Community: Manas Ranjan Dash

Caching mind map, from my notes

Manas Ranjan Dash — Fri, 15 May 2020 04:16:04 +0000

Caching from my notes. Caching (pronounced “cashing”) is the process of storing data in a cache.

Download and Zoom the specific area to read it properly.

A Mind map on Spring Framework

Manas Ranjan Dash — Tue, 11 Jun 2019 01:40:17 +0000

This is one of the experiment I started couple of years ago, and it's really helpful. When you take notes and read it again, it might be boring but if you put notes as a mind map, you will love to read it again again.

This piece is a trail in this platform, let me know your thoughts about this.

Tech Interviews: This might be your next question

Manas Ranjan Dash — Mon, 31 Dec 2018 17:13:23 +0000

A list of articles, videos, books for interview preparation....

This might be your next question…github

System Design

Log System

High Scalability blog

Systme desgin primer by donne martin

System Desgin by Shashank

Redis architecture

System Desgin Interview Question cont..

Online Movie Ticket booking

Recommedation and personalisation

Netflix Developer

System desgin case studies

System desgin for collab edit

How web works

Bloom Filter

How does HTTPS actually work?

Architecutre

Cassandra

Whatsapp Architecture

Scaling

Whatsapp Scaling

Microservices

At amazon

Distributed Systems

Distributed Systems in One Lesson by Tim Berglund

CAP Theorem CAP by Shekhar Gulati

Consistency: Every read is guaranteed to return the most recent write or an error
Availability: Every request receives a non-error response from a non-failing node in a reasonable time. It is expected that the client may not receive the most recent write
Partition tolerance: The system continues to operate when network partition happens

Deployment

Kubrnetes

Coding

Interview Question - geekForgeek

Interview Question - DonneMartin

Interview Question - simple programmer

Interview Question - hackernoon

Interview Question - LeetCode

Data Structures and Algorithms in Java

JAVA Interview questions - interviewbit

Add Two Numbers

this is a problem

Explanation of the solution

Ultimate Guide

Datastructure

All about tree

How To Not Be Stumped By Trees

Vaidehi Joshi’s world of Datastructure

When to use linkedlist over arraylist in java

DDD (Domain Driven Design)

How to define service industries

Capability-mapping-and-context-mapping

DDD the 5 mintue master

Caching

Caching Tutorial for Web Authors and Webmasters

Security

https://www.youtube.com/watch?v=otWst36CKyM

Login system

Definitive guide for website authentication

Courses

Safari Books - Learn design pattern

Safari Books - Break away system

Safari books - Java Inteview Guide

JAVA

10 JAVA interview question Java Interview question

REST

RESTful APIs

Microsoft Dcouments on API-Design best practice

Networking

100 networking question

Design Pattern

Design Pattern - DZONE

Design Pattern - JavaTPoint

Database

Understanding nosql

Process & Standard

Clean Code

Success Stories

System Desgin

Almost Everything

Everything

Web Architecture 101

Online Videos

5 Tips for System Design Interviews

System Design: How to design Twitter? Interview question at Facebook, Google, Microsoft

Tech Dummies - Narendra L

All about algorithms

Tech Primers

Interview Formats

For many comapnies

Some FAQ

(will continue adding to this in my git page)

FAQ#1 : Difference between JWT (Java Web Tokens) & Oauth

jwt-vs-oauth

Deep Copy vs Swallow Copy

RFC7519

JWT	OAuth
its a token, JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties	its a framework to dispense token
JWT is a different kind of OAuth token	OAuth token is not the only token
is not a pointer to information	a pointer to information
JWT contains real information, it can be large	can be small as its just a pointer
JWT are self-validating" what they mean is, any holder of the JWT can open it, validate it, and then make authorization decisions based on the claims presented in it.	Oauth are not
JWT supports "Federation" - anyone can generate a token, and anyone can read and validate a token .	used when there is no federation
used when asynchrony is required
security. Both are bearer tokens. Both need to be protected as secrets.	same
useful for self authenticating tokens
has lot more context about the user, session - including the signature.	less context
better at performance as no server call requried	server clal required
forced to have lower expiry times to these tokens, as they are valid till the pre-defined rules re valid

FAQ#2 : Difference between Container and VM

differences

Container	VM
Shares the OS and resources	A full virtualized system gets its own set of resources allocated to it, and does minimal sharing.
If you just want to isolate processes from each other and want to run a ton of them on a reasonably sized host, then Docker/LXC/runC seems to be the way to go.	If you want full isolation with guaranteed resources, a full VM is the way to go
How containers works at low level? Each container runs in its own namespace but uses exactly the same kernel as all other containers. The isolation happens because kernel knows the namespace that was assigned to the process and during API calls it makes sure that process can only access resources in its own namespace.	How virtualization works at low level? The net effect is that virtualization allows you to run two completely different OS on same hardware. Each guest OS goes through all the process of bootstrapping, loading kernel etc. You can have very tight security, for example, guest OS can't get full access to host OS or other guests and mess things up.
A virtual machine is a convenient way of packaging up virtual hardware, a kernel, and a user space.	A container, on the other hand, packages up only the user space; there is no kernel or virtual hardware.
Sharing an entire virtual machine with other developers can be inconvenient because of a virtual machine’s size and format	Containers have the advantage of providing developers, architects, quality engineering, release engineers, and systems administrators with a currency for collaboration that has the entire user space packaged and shipped in a convenient and easy to use format.

Here are possible drawbacks:

1) Polling intervals have to be set correctly. Too long makes the system is inefficient. Too short makes the database undergo heavy read load.
2) Read and write operation heavy DB. Usually, they are good at one of the two.
3) Manual delete procedures to be written to remove read messages.
4) Scaling is difficult conceptually and physically.

Same thoughts from github

interview by rockoder

Conclusion

These are just pointers where you can get some more details about a particular topic, but almost all of them required working knowledge for a deep dive and more thoughts on using the same.

All the best for your next round :)
Simplymanas

AboutMe | Blog | Github

Productivity Boosters: tools of my choice

Manas Ranjan Dash — Sat, 05 May 2018 16:48:28 +0000

To make life a little more meaningful and get more out of it I use many tools, technology, and apps in the day to day life. I call them as my productivity helpers and here are a list (in no specific order) of my choice for mobile apps, tools for Desktop, Laptop or MacBook those help me in increasing my productivity.

# Pomodoro technique https://pomodoro-tracker.com/

I follow the Pomodoro technique and have purchased an android app and using the online Pomodoro-tracker as well. Pomodoro is an effective yet simple technique and it makes you aware of the quality time you spent.

Pomodoro Technique® and Pomodoro® are registered trademarks of Francesco Cirillo.

Do more and have fun with time management. ~ Francesco Cirillo.

# codota

This tool helps me to search code from many GitHub organization and open source library. This makes me aware of the way people are writing code. Most of the time I get the right suggestion I need and with lots of examples. The team there called this tool as a*AI Pair Programmer*.

# Grammarly

Grammarly helps me in correcting grammatical mistakes everywhere when I start writing. Also, it notifies and helps is correcting the spelling.

# Freemind

This tool has changed my way of taking big notes. Now 80% of my notes are with Freemind. Also, I save them in online drives so that I can access them anywhere. Even I used them to present in my sessions. Whatever training, conferences, and meetings I attend I use FreeMind for sure.

Get FreeMind - free mind mapping software

Tony Buzan | Learn from the Inventor of Mind Mapping

FreeMind is a premier free mind-mapping software written in Java. Do you want to prioritize, know where you are, where you've been and where you are heading, as Stephen Covey would advise you?

# Google Keep

Google Keep is a note-taking service developed by Google. I have been using google keep for years and happy with the tiny note taking app. I use it almost every day and keep writing stuff in the mobile and track them in PC or MacBook.

# To-Do Lists

Most of the time we forget What tasks are there for the day, so a TO-DO list comes for rescue.

Flask IO is a Really simple to-do list you can have.

# EnkiApp

This is the app that I love to open every day in the morning. A 6 minute of learning with a 5 question test(sometimes), I learn few technologies. This is an awesome place to review your learning and spending 6 minutes per technology is not a big deal. Once you start this, you will get addicted in few days and that's a good addition for sure.

# booklet

The booklet is a free app for those who wish to read books but don’t get enough time. The motto for this app is To cultivate the habit of reading amongst the youth.

Every week we read a bestselling book and create a Booklet (a book summary), going beyond a book review.

# algorithms

One of the best app that I spent money for. Beautiful animation with the dual mode of learning Algorithm. This app justifies that visual mode of teaching is a great way to learn. Almost all the algorithm and data structure are beautifully animated and presented by the creator.

# Safari books online

With 30000 plus books in Safari, you learn the way you learn best. I enjoy my subscription and have unlimited access to videos, live online training, learning paths, books, tutorials, and more. I have created the playlist and watch most of the videos every day.

# sangaku maths

If you love maths, this is one of the right apps for you. Created by an interdisciplinary team, the explanation and examples are really nice.

# Big(o) Clock

This is my cheat sheet for all Big(O) solution. This android app will teach you the way you can calculate the time complexity Big(O) with so many examples. All data structures and sorting algorithms include useful links to websites or videos that will help user's gain a deeper understanding of the topic.

# Headfone

One of my most favorite apps. The headphone is free where awesome Stories, Comedy & Podcasts are available for entertainment.

... till next, keep boosting your productivity

Hi, I'm Manas Ranjan Dash

Manas Ranjan Dash — Sat, 03 Jun 2017 07:59:13 +0000

I have been coding for 12 years.

You can find me on Twitter as @simplymanas

I live in Bangalore.

I work for thoughts2share

I mostly program in these languages: C#, Java.

I am currently learning more about Python, Data-Science, Security.

Nice to meet you.