Wells Fargo Senior Software Engineer L3 Interview Questions and Answers

Closure in JavaScript is the combination of a function and the lexical environment within which that function was declared.

• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It is created whenever a function is defined within another function.

• Example: function outerFunction() { let outerVar = 'I am outer'; function innerFunction() { console.log(outerV...read more

Event loop in JavaScript is responsible for managing asynchronous operations by executing callback functions in a non-blocking way.

• Event loop is a mechanism that allows JavaScript to perform non-blocking I/O operations.

• It continuously checks the call stack and the callback queue, moving functions from the queue to the stack when the stack is empty.

• Event loop ensures that JavaScript remains responsive and can handle mul...read more

Redux is a predictable state container for JavaScript apps.

• Actions are dispatched to the store

• Reducers specify how the state changes in response to actions

• Store holds the state of the application

• Components subscribe to the store to get updates

Micro frontend architecture is an approach to front-end development where a single web application is composed of multiple smaller, independent applications.

• Each micro frontend is responsible for a specific feature or functionality

• Micro frontends can be developed, tested, and deployed independently

• They can be built using different technologies and frameworks

• Communication between micro frontends can be achieved through ...read more