Wipro Golang Developer Interview Questions and Answers

Goroutines are lightweight threads of execution in Go that allow for concurrent programming.

• Goroutines are created using the 'go' keyword followed by a function call.

• Concurrency is the ability to run multiple tasks simultaneously, while parallelism is the ability to run multiple tasks at the same time.

• Goroutines can communicate with each other using channels.

• Example: go func() { fmt.Println('Hello, world!') }()

• Example:...read more

Channels are a way for goroutines to communicate. Buffered channels have a capacity while unbuffered channels do not.

• Unbuffered channels block until a sender and receiver are ready to communicate

• Buffered channels allow for asynchronous communication up to a certain capacity

• Channels are typed, meaning they can only send and receive values of a specific type

Array is a fixed-size collection of elements of the same type. Slice is a dynamic-size sequence of elements of the same type.

• Arrays have a fixed size and are declared using square brackets, e.g. var arr [5]int

• Slices are dynamic and are declared using the make() function, e.g. var s []int = make([]int, 5)

• Slices can also be created using a slice literal, e.g. s := []int{1, 2, 3}

I have worked on various projects, including a web application for managing employee data.

• I follow the Arrange-Act-Assert pattern for unit testing

• I use testing frameworks like GoConvey and testify

• I write test cases for both positive and negative scenarios

• I use mocks and stubs to isolate dependencies

• I aim for high code coverage to ensure thorough testing

Microservices are small, independent services while monolithic is a single, large application.

• Microservices are loosely coupled and can be developed and deployed independently.

• Monolithic applications are tightly coupled and require a complete redeployment for any changes.

• Microservices allow for better scalability and fault tolerance.

• Monolithic applications are easier to develop and test.

• Examples of microservices includ...read more

Singleton is a creational design pattern that ensures a class has only one instance and provides a global point of access to it.

• Singleton pattern restricts the instantiation of a class to one object.

• It is useful when exactly one object is needed to coordinate actions across the system.

• Singleton pattern can be implemented using lazy initialization or eager initialization.

• Example: Database connection, Logger, Configurati...read more