HCLTech Golang Developer Interview Questions and Answers

Developed a scalable web application using Golang for real-time data processing and analytics.

• Utilized Gorilla Mux for routing, enabling clean and efficient URL handling.

• Implemented goroutines for concurrent processing of data streams, improving performance.

• Integrated PostgreSQL for data storage, ensuring ACID compliance and reliability.

• Used Docker for containerization, facilitating easy deployment and scalability.

• Empl...read more

gRPC is a high-performance, open-source RPC framework developed by Google.

• gRPC stands for Google Remote Procedure Call.

• It uses HTTP/2 for transport, Protocol Buffers for serialization, and supports multiple programming languages.

• gRPC is commonly used for building efficient and scalable microservices.

• It allows for bidirectional streaming and authentication features.

• Examples of companies using gRPC include Google, Netfli...read more

Concurrency is the ability of a program to execute multiple tasks simultaneously. Race condition occurs when multiple threads access shared data and try to change it at the same time.

• Concurrency allows multiple tasks to run in parallel, improving performance and efficiency.

• Race condition happens when multiple threads access and modify shared data without proper synchronization.

• To prevent race conditions, synchronizatio...read more

A slice is a dynamically-sized, flexible view of elements in an array in Go.

• Slices are references to arrays, allowing for efficient manipulation of data.

• They have a length and a capacity, with the length being the number of elements in the slice and the capacity being the maximum number of elements that the slice can hold.

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

• Example: ...read more

GOPATH is the workspace for Go projects, while GOROOT is the location where Go is installed.

• GOPATH is used to store Go project files and dependencies.

• GOROOT is the location where the Go standard library and tools are installed.

• GOPATH can have multiple directories, while GOROOT is a single directory.

• Example: GOPATH=/home/user/go, GOROOT=/usr/local/go

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

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