Golang Developer Interview Questions and Answers for Freshers

Updated 12 Dec 2024

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Q1. different types of channels in go and where we can use these channels

Ans.

Types of channels in Go and their use cases

Buffered channels: Allow multiple senders to send data without blocking until the buffer is full
Unbuffered channels: Synchronize goroutines by blocking sender until receiver is ready
Bidirectional channels: Allow both sending and receiving data
Receive-only channels: Restrict channel to only receive data
Send-only channels: Restrict channel to only send data

Q2. what is concurrency and how we can achieve using go.

Ans.

Concurrency is the ability to run multiple tasks simultaneously, achieving parallelism.

Go uses goroutines to achieve concurrency
Goroutines are lightweight threads managed by the Go runtime
Concurrency in Go is achieved using channels for communication between goroutines

Q3. Print 1 to 10 numbers using go routines and channels

Ans.

Use go routines and channels to print numbers 1 to 10

Create a channel to communicate between go routines
Use a for loop to create 10 go routines, each printing a number
Send the numbers through the channel and print them in the main routine

Q4. implement stack if a structure is given

Ans.

Implement a stack using the given structure.

Create a struct with an array to store the stack elements and an index to keep track of the top element
Implement functions like push, pop, and peek to manipulate the stack
Ensure to handle stack overflow and underflow cases

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Q5. Go routines and async patterns in golang

Ans.

Go routines are lightweight threads managed by Go runtime for concurrent programming. Async patterns in Golang involve using channels for communication between goroutines.

Go routines are created using the 'go' keyword followed by a function call.
Channels are used to communicate data between goroutines.
Async patterns in Golang can be implemented using channels and select statements.
Example: go func() { fmt.Println('Hello')}()
Example: ch := make(chan int) // create a channel