Netomi Senior Devops Engineer Interview Questions and Answers

Closure is a function that has access to variables in its outer scope, even after the outer function has returned.

• Closure is created when a function is defined inside another function.

• The inner function has access to the outer function's variables and parameters.

• The inner function can access the outer function's variables even after the outer function has returned.

• Closures are used for data privacy, event handlers, and...read more

hoc, pure component and react.memo are all ways to optimize React components.

• Higher Order Components (HOC) are functions that take a component and return a new component with additional functionality.

• Pure Components are components that only re-render when their props or state change.

• React.memo is a higher order component that memoizes the result of a component rendering, preventing unnecessary re-renders.

JavaScript counters can be incremented using various methods, including loops and functions, to track values over time.

• Use 'let count = 0;' to initialize a counter.

• Increment using 'count++;' or 'count += 1;'.

• Example: for (let i = 0; i < 5; i++) { count++; } results in count = 5.

• Functions can encapsulate counter logic: function increment() { count++; }.

Master-slave architecture is a design pattern where one device or process controls one or more other devices or processes.

• Master device/process controls the slave device/process

• Master device/process is responsible for distributing tasks to the slave devices/processes

• Slave devices/processes report back to the master device/process

• Commonly used in distributed computing, database replication, and networking

• Examples includ...read more

Jenkins is an open-source automation server that helps to automate parts of the software development process.

• Jenkins is used for continuous integration and continuous delivery (CI/CD) pipelines.

• It can be configured to automatically build, test, and deploy code changes.

• Jenkins supports a wide range of plugins that can be used to extend its functionality.

• It can be integrated with other tools such as Git, Docker, and AWS.

• ...read more

Auto scaling and load balancing are AWS services that help in managing traffic and scaling resources automatically.

• Auto Scaling helps in automatically adjusting the number of EC2 instances based on traffic demand.

• Load Balancing helps in distributing traffic across multiple EC2 instances.

• Auto Scaling and Load Balancing work together to ensure that the application is highly available and can handle sudden spikes in traff...read more