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404 golang developer interview questions shared by candidates

Output based Golang questions like parameterized defer function, a simple sum of digits question, but had to be coded specifically in Golang & some Golang Framework related questions. Main focus was on syntax rather than logic.
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Golang Developer

Interviewed at Josh Software

3.4★
Aug 4, 2022

Output based Golang questions like parameterized defer function, a simple sum of digits question, but had to be coded specifically in Golang & some Golang Framework related questions. Main focus was on syntax rather than logic.

There were three rounds, 1. Technical interview Basic and intermediate questions about golang, with questions ranging on data types, channels and goroutines. Asked me to write a program to check if string is palindrome. 2. System Design Interview: Detailed discussion about architecture of current project, what can be done to improve it, discussing the loopholes Asked to design an application with APIs 3. Managerial Round: Discussion about current project and current role.
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Senior Golang Developer

Interviewed at Siemens

4.1★
Jan 2, 2024

There were three rounds, 1. Technical interview Basic and intermediate questions about golang, with questions ranging on data types, channels and goroutines. Asked me to write a program to check if string is palindrome. 2. System Design Interview: Detailed discussion about architecture of current project, what can be done to improve it, discussing the loopholes Asked to design an application with APIs 3. Managerial Round: Discussion about current project and current role.

You are given an array hours that represents the number of hours an employee worked each day. A day is classified as a tiring day if the employee worked strictly more than 8 hours that day. A well-performing interval is a consecutive sequence of days where the number of tiring days is strictly greater than the number of non-tiring days. Your task is to find the length of the longest well-performing interval. For example, if hours = [9, 9, 6, 0, 6, 6, 9]: Days with hours > 8 are tiring days: positions 0, 1, and 6 (values 9, 9, 9) Days with hours ≤ 8 are non-tiring days: positions 2, 3, 4, 5 (values 6, 0, 6, 6) The interval from index 0 to 2 has 2 tiring days and 1 non-tiring day, making it well-performing The entire array from index 0 to 6 has 3 tiring days and 4 non-tiring days, which is not well-performing The goal is to find the maximum length among all possible well-performing intervals.
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Backend Software Engineer (Golang)

Interviewed at NetApp

3.8★
Mar 5, 2026

You are given an array hours that represents the number of hours an employee worked each day. A day is classified as a tiring day if the employee worked strictly more than 8 hours that day. A well-performing interval is a consecutive sequence of days where the number of tiring days is strictly greater than the number of non-tiring days. Your task is to find the length of the longest well-performing interval. For example, if hours = [9, 9, 6, 0, 6, 6, 9]: Days with hours > 8 are tiring days: positions 0, 1, and 6 (values 9, 9, 9) Days with hours ≤ 8 are non-tiring days: positions 2, 3, 4, 5 (values 6, 0, 6, 6) The interval from index 0 to 2 has 2 tiring days and 1 non-tiring day, making it well-performing The entire array from index 0 to 6 has 3 tiring days and 4 non-tiring days, which is not well-performing The goal is to find the maximum length among all possible well-performing intervals.

Golang: 1. list all the datatypes in golang 2. what is interface? why do you use it? 3. what are concurrency and parralism and what is the difference between both? 4. difference between goroutines and threads? 5. what are channels for? 6. can you do something in goroutines without channels? 7. difference between arrays and slices? 8. what is a closure? define it. 9. what is the size of int(not int8, int16)? where is the size of int defined? 10. What is runtime? runtime package? 11. how can you get how many cores your computer has? 12. How would you tell a goroutine to use less less core than what you have? 13. how would you determine the type of a variable? which package to use for it? 14. What all types a map can store? 15. What is rune? 16. what are services in golang? 17. Define a singleton? 18. Abstraction? Interfaces? Implementation? 19. When do you use a structure in golang? 20. How do define struct type functions? and how can you access those functions? Can you define such functions to other datatypes as well? 21. Why are there no classes in Go? 22. Compile time and runtime? 23. Do you need to convert the type of a variable of interface{} type passed in a function as an argument? 24. Why are goroutines light-weight? Explain reason. 25. Do threads share memory? how? 26. if capacity is not defined in slice, what would the capacity be? Redis: 1. List all the datatypes in Redis? 2. what all commands u know in redis? 3. what is ttl? 4. how to set ttl in redis? Rabbitmq: 1. what is rabbitmq? 2. where do you use rabbitmq? 3. types 4. fan out type 5. how would you handle an error in rabbitmq? 6. What if you not pass an ack in rabbitmq? Mongodb: 1. what is mongodb? 2. what are documents? 3. how to do crud on data using mongodb? 4. what type of data you store in mongodb? 5. Wrote an update query in mongodb. Programming Question: 1. Given a string "abca" print first non-repetitive letter from this string. 2. func main(){ fmt.Println("2") go func(){ fmt.Println("2") }() } what would be the output? and why? 3. func getType(i interface{}){ } perform functionalities on the basis of type of variable.
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Golang Developer

Interviewed at Brevo

3.5★
Aug 31, 2019

Golang: 1. list all the datatypes in golang 2. what is interface? why do you use it? 3. what are concurrency and parralism and what is the difference between both? 4. difference between goroutines and threads? 5. what are channels for? 6. can you do something in goroutines without channels? 7. difference between arrays and slices? 8. what is a closure? define it. 9. what is the size of int(not int8, int16)? where is the size of int defined? 10. What is runtime? runtime package? 11. how can you get how many cores your computer has? 12. How would you tell a goroutine to use less less core than what you have? 13. how would you determine the type of a variable? which package to use for it? 14. What all types a map can store? 15. What is rune? 16. what are services in golang? 17. Define a singleton? 18. Abstraction? Interfaces? Implementation? 19. When do you use a structure in golang? 20. How do define struct type functions? and how can you access those functions? Can you define such functions to other datatypes as well? 21. Why are there no classes in Go? 22. Compile time and runtime? 23. Do you need to convert the type of a variable of interface{} type passed in a function as an argument? 24. Why are goroutines light-weight? Explain reason. 25. Do threads share memory? how? 26. if capacity is not defined in slice, what would the capacity be? Redis: 1. List all the datatypes in Redis? 2. what all commands u know in redis? 3. what is ttl? 4. how to set ttl in redis? Rabbitmq: 1. what is rabbitmq? 2. where do you use rabbitmq? 3. types 4. fan out type 5. how would you handle an error in rabbitmq? 6. What if you not pass an ack in rabbitmq? Mongodb: 1. what is mongodb? 2. what are documents? 3. how to do crud on data using mongodb? 4. what type of data you store in mongodb? 5. Wrote an update query in mongodb. Programming Question: 1. Given a string "abca" print first non-repetitive letter from this string. 2. func main(){ fmt.Println("2") go func(){ fmt.Println("2") }() } what would be the output? and why? 3. func getType(i interface{}){ } perform functionalities on the basis of type of variable.

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