Exaware Interview Questions and Answers

A channel in Go is a communication mechanism that allows goroutines to communicate with each other.

• Buffered channels have a specific capacity and can send multiple values without the need for a corresponding receive operation immediately.

• Unbuffered channels have no capacity and require both a send and receive operation to be ready at the same time for communication to occur.

Scaling refers to the ability of a system to handle increasing amounts of work or its potential to accommodate growth.

• Horizontal scaling involves adding more machines to distribute the load, while vertical scaling involves increasing the resources of a single machine.

• Horizontal scaling is more cost-effective and provides better fault tolerance, but can be more complex to implement.

• Vertical scaling is simpler to implement but can be more expensive and may have limitations in t...read more

Go code to remove duplicate elements from a slice of strings

• Use a map to keep track of unique elements

• Iterate over the slice and add elements to the map

• Create a new slice with unique elements from the map

Concurrency in Go is achieved using goroutines and channels.

• Use goroutines to run functions concurrently

• Communicate between goroutines using channels

• Avoid using shared memory for synchronization

Arrays have fixed length, slices are dynamic and can grow/shrink. Slices are references to arrays.

• Arrays have fixed length, specified at compile time.

• Slices are dynamic, can grow or shrink at runtime.

• Slices are references to arrays, allowing for more flexibility.

• Example: var arr [3]string // array with fixed length of 3

• Example: slice := make([]string, 0) // slice with dynamic length

Implementing a struct in Go code

• Define a struct using the 'type' keyword

• Add fields to the struct with their respective data types

• Access struct fields using dot notation

Containerization is a method of packaging, distributing, and running applications in isolated environments called containers.

• Containers are lightweight, portable, and can run on any platform that supports containerization.

• They include everything needed to run the application, such as code, runtime, system tools, libraries, and settings.

• Popular containerization tools include Docker, Kubernetes, and Podman.

• Containerization helps in achieving consistency in development, testing,...read more

Struct is a user-defined data type that groups related data fields together. Interface defines a set of methods that a type must implement.

• Struct is used to create complex data structures by grouping related data fields together.

• Interface defines a set of methods that a type must implement. It allows for polymorphism in Go.

• Example: type Person struct { Name string; Age int }

• Example: type Shape interface { Area() float64 }

• Example: type Circle struct { Radius float64 }

• Example: ...read more