Infosys Interview Questions, Process, and Tips for Experienced

A map is a built-in data structure in Golang that allows you to store key-value pairs.

• Maps are unordered collections of key-value pairs.

• Keys in a map must be unique.

• Maps are useful for efficient lookup and retrieval of values based on their keys.

• You can add, update, and delete key-value pairs in a map.

• Example: map[string]int{"apple": 5, "banana": 3}

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

• Slices are similar to arrays but with a variable length.

• They are reference types and can be resized.

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

• They provide a convenient way to work with collections of data.

Arrays have fixed length, while slices are dynamic. Slices are references to arrays.

• Arrays have a fixed length, while slices can grow or shrink dynamically.

• Slices are references to arrays, allowing for efficient memory usage.

• Arrays are value types, while slices are reference types.

• Arrays are initialized with a specific size, while slices can be created from existing arrays or other slices.

• Slices provide additional func

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

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

• They are executed concurrently and independently of the main program.

• Go routines communicate with each other using channels.

• They are used to achieve concurrency and parallelism in Go programs.

Channels are used in Go to enable communication and synchronization between goroutines.

• Channels are typed and can only send or receive values of that type.

• They can be created using the built-in make() function.

• The <- operator is used to send and receive values from channels.

• Channels can be used to implement various synchronization patterns like blocking and non-blocking operations.

• They are commonly used for concurrent

Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.

• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing mock dependencies.

• There are three types of dependency injection: constructor injection, setter injection, and interface injection.

Terraform state file is a file that keeps track of the resources managed by Terraform in a specific infrastructure.

• Terraform state file stores metadata about the resources being managed.

• It helps Terraform understand the current state of the infrastructure and track changes over time.

• State file is usually stored locally or remotely in a backend like AWS S3 or Terraform Cloud.

• It should be stored securely to prevent unaut

A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure optimal resource utilization, reliability, and performance.

• Balances incoming network or application traffic across multiple servers

• Improves reliability by distributing workload evenly

• Enhances performance by preventing any single server from becoming a bottleneck

• Can be hardware-based or software-base...read more

RDS in AWS stands for Relational Database Service, a managed database service that makes it easy to set up, operate, and scale a relational database in the cloud.

• RDS is a fully managed database service provided by AWS

• It supports popular database engines like MySQL, PostgreSQL, Oracle, SQL Server, and MariaDB

• RDS automates routine tasks like hardware provisioning, database setup, patching, and backups

• It offers high avail...read more

A step function is a mathematical function that changes abruptly from one constant value to another.

• Step functions are often used in computer science and signal processing to model discrete changes in a system.

• Examples include the Heaviside step function and the rectangular function.

• Step functions are characterized by having a constant value within specific intervals and sudden jumps at the boundaries.