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407 golang developer interview questions shared by candidates

The assignment is to code a ethereum blockchain parser that will allow to query transactions for subscribed address. Can only use Go, no external libraries, use ethereum json rpc, use memory storage for storing any data (but must be easily extended). Keep it simple, try to finish within 4 hours, perfect production ready service is not required.
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Backend Golang Developer

Interviewed at Trust Wallet

3.6★
Sep 12, 2023

The assignment is to code a ethereum blockchain parser that will allow to query transactions for subscribed address. Can only use Go, no external libraries, use ethereum json rpc, use memory storage for storing any data (but must be easily extended). Keep it simple, try to finish within 4 hours, perfect production ready service is not required.

What is a Go channel and how is it declared? What happens if a panic is not recovered? How do you send and receive values through a channel? How do you handle errors returned from functions? How do you publish a single message to a topic? How can you run multiple goroutines concurrently? How do you consume a single message from a topic? How do you send and receive values through a channel? How do you write a simple test function? Code test (very simple)
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Senior Golang Software Engineer

Interviewed at American Express

4.1★
Oct 8, 2025

What is a Go channel and how is it declared? What happens if a panic is not recovered? How do you send and receive values through a channel? How do you handle errors returned from functions? How do you publish a single message to a topic? How can you run multiple goroutines concurrently? How do you consume a single message from a topic? How do you send and receive values through a channel? How do you write a simple test function? Code test (very simple)

1. You are tasked with designing a concurrent system in Go where multiple goroutines need to access and modify shared data. However, you need to ensure that the system is deadlock-free. Describe a scenario where deadlock might occur and how you would prevent it using Go’s concurrency primitives. 2. What is Go Routine and how it works internally in detail? 3. How Concurrency is diff from parallelism? 4. Explain how Polymorphism can be achieved 5. Create two goroutines that play a "ping-pong" game by sending messages to each other through channels. One goroutine sends "ping," and the other responds with "pong." Limit the number of exchanges between the goroutines to 10, then gracefully exit. Aws Cloud 1.Question: You are tasked with designing an architecture for a web application that needs to handle millions of users globally. The application must be highly available, scalable, and resilient to failures. Describe the architecture you would implement on AWS and the services you would use to achieve these requirements. 2.Your company has a complex on-premises application with a monolithic architecture, relational database, and dependency on a legacy system. The application needs to b be migrated to AWS with minimal downtime. How would you plan and execute this migration? What AWS services would you utilize? 3.You are developing a multi-tenant SaaS application on AWS that will be used by multiple customers, each with its own data. How would you design the architecture to ensure data isolation, security, and compliance with regulations like GDPR? Which AWS services and best practices would you use?
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Golang Developer

Interviewed at Volkswagen Group Digital Solutions India

4.4★
Dec 12, 2024

1. You are tasked with designing a concurrent system in Go where multiple goroutines need to access and modify shared data. However, you need to ensure that the system is deadlock-free. Describe a scenario where deadlock might occur and how you would prevent it using Go’s concurrency primitives. 2. What is Go Routine and how it works internally in detail? 3. How Concurrency is diff from parallelism? 4. Explain how Polymorphism can be achieved 5. Create two goroutines that play a "ping-pong" game by sending messages to each other through channels. One goroutine sends "ping," and the other responds with "pong." Limit the number of exchanges between the goroutines to 10, then gracefully exit. Aws Cloud 1.Question: You are tasked with designing an architecture for a web application that needs to handle millions of users globally. The application must be highly available, scalable, and resilient to failures. Describe the architecture you would implement on AWS and the services you would use to achieve these requirements. 2.Your company has a complex on-premises application with a monolithic architecture, relational database, and dependency on a legacy system. The application needs to b be migrated to AWS with minimal downtime. How would you plan and execute this migration? What AWS services would you utilize? 3.You are developing a multi-tenant SaaS application on AWS that will be used by multiple customers, each with its own data. How would you design the architecture to ensure data isolation, security, and compliance with regulations like GDPR? Which AWS services and best practices would you use?

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