Go error: go : go.mod file not found in current directory or any parent directory; (working on GOPATH/src)

As of Go 1.16, the GO111MODULE environment variable is treated as "on" by default, meaning Go expects to find a go.mod file, and no longer falls back to pre-module GOPATH behavior.

If you want to go back to the pre-1.16 behavior, you now have to explicitly specify GO111MODULE=auto, but you're far better off creating a go.mod file.

See https://golang.org/doc/go1.16#go-command and https://golang.org/ref/mod

Source - https://stackoverflow.com/questions/67929883/go-error-go-go-mod-file-not-found-in-current-directory-or-any-parent-director 

𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧𝐬 | Amazon 2022

 Amidst the massive layoffs in Tech industry in these tough times, there are many of us preparing right now for interviews.

LeetCode is a good source to look at the current level of questions.

Below is the list of questions currently being asked by Amazon in the last 3 to 4 months.

-- 𝐆𝐫𝐚𝐩𝐡𝐬

1) Process Ordering - https://lnkd.in/dN4ErKyE

2) Number of Islands - https://lnkd.in/dHQJGhPJ

3) k Jumps on Grid - https://lnkd.in/dKM_ETsM)

-- 𝐓𝐫𝐢𝐞

1) Finding Prefix in Dictionary - https://lnkd.in/dpRvFDq5

-- 𝐓𝐫𝐞𝐞

1) Binary Tree Top Down View - https://lnkd.in/dmun-Pn3

2) Traversing binary tree in an outward manner.

3) Diameter of a binary tree [Path is needed] - https://lnkd.in/dH-w_DQV

-- 𝐒𝐥𝐢𝐝𝐢𝐧𝐠 𝐰𝐢𝐧𝐝𝐨𝐰

1) Contains Duplicates III - https://lnkd.in/djcWHTaX

2) Minimum Window Substring [Variation of this question] - https://lnkd.in/dPfnQZmr

-- 𝐋𝐢𝐧𝐤𝐞𝐝 𝐋𝐢𝐬𝐭

1) Reverse a Linked List II - https://lnkd.in/diHAJZUJ

2) Remove Loop From Linked List - https://lnkd.in/d-zVawwX

3) Reverse a Linked List in k-groups - https://lnkd.in/de99T3hQ

-- 𝐁𝐢𝐧𝐚𝐫𝐲 𝐒𝐞𝐚𝐫𝐜𝐡

1) Search In rotate sorted Array - https://lnkd.in/djxEpFxF

-- 𝐀𝐫𝐫𝐚𝐲𝐬

1) Max bandWidth [Priority Queue, Sorting] - https://lnkd.in/d6JE2xpz

2) Next permutation - https://lnkd.in/dk9cHQbw

3) Largest Rectangle in Histogram - https://lnkd.in/dQHQcF-5

Credits - Sandeep Kumar

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Join my Telegram group for 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐏𝐫𝐞𝐩𝐚𝐫𝐚𝐭𝐢𝐨𝐧 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 👉https://lnkd.in/gDBqRNBw

How to access WSL2 Linux files from Windows file explorer?

 File Management

1. Open File Explorer
2. Type \\wsl$ on address bar
3. Press Enter

𝐒𝐲𝐬𝐭𝐞𝐦 𝐃𝐞𝐬𝐢𝐠𝐧 𝐆𝐨𝐥𝐝𝐦𝐢𝐧𝐞 ❤️️

 System Design rounds are an important part of the Software Engineering interview process because they test a candidate's ability to design and implement large-scale systems.

Here is the list of some amazing resource on System Design -

✅ Things you must know in System Design

👉System design basics: https://bit.ly/3SuUR0Y

👉Horizontal and vertical scaling: https://bit.ly/3slq5xh

👉 Load balancing and Message queues: https://bit.ly/3sp0FP4

👉High-level design and low-level design, Consistent Hashing, Monolithic and Microservices architecture: https://bit.ly/3DnEfEm

👉 Caching, Indexing, Proxies: https://bit.ly/3SvyVDc

👉 Networking, How Browsers work, Content Network Delivery ( CDN): https://bit.ly/3TOHQRb

👉 Database Sharding, CAP Theorem, Database schema Design: https://bit.ly/3CZtfLN

👉 Concurrency, API, Components + OOP + Abstraction : https://bit.ly/3sqQrhj

👉 Estimation and Planning, Performance: https://bit.ly/3z9dSPN

👉 Map Reduce, Patterns, and Microservices: https://bit.ly/3zcsfmv

👉 SQL vs NoSQL and Cloud: https://bit.ly/3z8Aa49

👉 Most Popular System Design Questions: https://bit.ly/3Dp40Ux

✅ System Design Case Studies 

👉 Design Netflix: https://bit.ly/3GrAUG1

👉 Design Reddit: https://bit.ly/3OgGJrL

👉 Design Messenger App : https://bit.ly/3DoAAXi

👉 Design Instagram: https://bit.ly/3BFeHlh

👉 Design Dropbox: https://bit.ly/3SnhncU

👉 Design Youtube: https://bit.ly/3dFyvvy

👉 Design Tinder: https://bit.ly/3Mcyj3X

👉 Design Yelp: https://bit.ly/3E7IgO5

👉 Design Whatsapp: https://bit.ly/3M2GOhP

👉 Design URL shortener : https://bit.ly/3xP078x

👉 Design Amazon Prime Video: https://bit.ly/3hVpWP4

👉 Design Twitter: https://bit.ly/3qIG9Ih

👉 Design Uber: https://bit.ly/3fyvnlT

👉 Design TikTok : https://bit.ly/3UUlKxP

👉 Design Facebook's Newsfeed: https://bit.ly/3RldaW7

👉 Design Web Crawler: https://bit.ly/3DPZTBB

👉 Design API Rate Limiter: https://bit.ly/3BIVuh7

✅ All solved case studies: https://bit.ly/3dCG1rc

👉 System Design Important terms - https://bit.ly/3Om9d3H

👉 Most Popular System Design Questions: https://bit.ly/3E9oH7K

👉 Complete System Design Basics Series: https://bit.ly/3rG1cfr

Save this post for later.

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Join my Telegram group for 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐏𝐫𝐞𝐩𝐚𝐫𝐚𝐭𝐢𝐨𝐧 𝐑𝐞𝐬𝐨𝐮𝐫𝐜𝐞𝐬 👉https://lnkd.in/gDBqRNBw 

 

API architectural styles

The following image displays the most common architectural styles for APIs.

🔹 1. REST REST, which was proposed in 2000, is the most widely used style for APIs. It is often utilized between front-end clients and back-end services, and it adheres to six architectural constraints. The payload format may be JSON, XML, HTML, or plain text.

🔹 2. GraphQL Meta proposed GraphQL in 2015. It provides a schema and type system that is ideal for complicated systems where entities' relationships are graph-like. In the diagram below, GraphQL can retrieve user and order information in one call, while REST necessitates multiple calls.

GraphQL does not replace REST but can be built upon existing REST services.

🔹 3. Web socket Web socket is a protocol that enables full-duplex communications over TCP. Clients create web sockets to receive real-time updates from back-end services. Unlike REST, which always "pulls" data, web socket allows data to be "pushed".

🔹 4. Webhook Webhooks are frequently used for third-party asynchronous API calls. In the diagram below, Stripe or Paypal is used for payment channels, and a webhook for payment results is registered. When a third-party payment service is completed, it notifies the payment service if the payment was successful or failed. Webhook calls are usually part of the system's state machine.

🔹 5. gRPC gRPC, which was released in 2016, is used for communications among microservices. The gRPC library handles encoding/decoding and data transmission.

🔹 6. SOAP SOAP stands for Simple Object Access Protocol, and its payload is only XML, making it suitable for internal system communications.