Brillio Backend Developer Interview Questions and Answers

Variable scope refers to the visibility and accessibility of variables within different parts of a program.

• Variables declared inside a function have local scope and are only accessible within that function.

• Global variables can be accessed from anywhere in the program.

• Nested functions can access variables from their parent functions.

Concurrent API calls happen when multiple requests are made simultaneously, allowing for faster processing.

• Concurrent API calls can be achieved using asynchronous programming techniques such as callbacks, promises, or async/await.

• API calls can be made in parallel or in sequence, depending on the requirements of the application.

• Tools like Axios or Fetch API in JavaScript can be used to make concurrent API calls.

• Concurre...read more

Use blue-green deployment or canary deployment to deploy updates without downtime.

• Utilize blue-green deployment strategy to switch traffic between two identical environments.

• Implement canary deployment to gradually roll out updates to a small subset of users before full deployment.

• Use feature flags to enable/disable new features without impacting the entire system.

• Leverage containerization technologies like Docker for ...read more