IBM Golang Developer Interview Questions and Answers

Asked mostly on grpc.
Couple of coding questions like write the protobuf file for interfaces and gave a string from which asked to find out the valid IP address in that string.

Golang Basics, DBMS, Channels, Unit Test

Q1. What is map and how it i useful
Ans. 
A map is a built-in data structure in Golang that allows you to store key-value pairs.
• Maps are unordered collections of key-value pairs.

• Keys in a map must be unique.

• Maps are useful for efficient lookup and retrieval of values based on their keys.

• You can add, update, and delete key-value pairs in a map.

• Example: map[string]int{"apple": 5, "banana": 3}
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Q2. Explain about slice
Ans. 
A slice is a dynamically-sized, flexible view of an underlying array in Go.
• Slices are similar to arrays but with a variable length.

• They are reference types and can be resized.

• Slices can be created using the make() function or by slicing an existing array.

• They provide a convenient way to work with collections of data.
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Q3. Difference between slice and array
Ans. 
Arrays have fixed length, while slices are dynamic. Slices are references to arrays.
• Arrays have a fixed length, while slices can grow or shrink dynamically.

• Slices are references to arrays, allowing for efficient memory usage.

• Arrays are value types, while slices are reference types.

• Arrays are initialized with a specific size, while slices can be created from existing arrays or other slices.

• Slices provide additional func
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Q4. What are go routines
Ans. 
Go routines are lightweight threads of execution that allow concurrent programming in Go.
• Go routines are created using the 'go' keyword followed by a function call.

• They are executed concurrently and independently of the main program.

• Go routines communicate with each other using channels.

• They are used to achieve concurrency and parallelism in Go programs.
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Q5. How channels are used
Ans. 
Channels are used in Go to enable communication and synchronization between goroutines.
• Channels are typed and can only send or receive values of that type.

• They can be created using the built-in make() function.

• The <- operator is used to send and receive values from channels.

• Channels can be used to implement various synchronization patterns like blocking and non-blocking operations.

• They are commonly used for concurrent
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Q1. Reverse a string
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