Golang Developer

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

Q6. difference between goroot and gopath

Ans.

GOROOT is the root directory where Go is installed, while GOPATH is the workspace directory where Go projects are stored.

  • GOROOT is where Go's standard library and tools are located

  • GOPATH is where your own Go projects and their dependencies are stored

  • You can have multiple GOPATHs to organize different projects

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