Cai Info India Front end Developer Interview Questions and Answers

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

• A closure allows a function to access variables from an outer function even after the outer function has finished executing.

• Closures are created every time a function is created, at function declaration time.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunct...read more

Positions in CSS refer to the different ways elements can be placed on a webpage.

• Static: default positioning, elements flow in the order they appear in the HTML

• Relative: positioned relative to its normal position

• Absolute: positioned relative to its nearest positioned ancestor

• Fixed: positioned relative to the viewport and does not move when scrolled

Event loop in JavaScript manages asynchronous operations by executing callback functions in a queue.

• Event loop is responsible for handling asynchronous operations in JavaScript.

• It allows non-blocking I/O operations by executing callback functions in a queue.

• Event loop continuously checks the call stack and the callback queue to prioritize tasks.

Interview questions for Software Developer on OOPs, Page Life Cycle, State Management, MVC Filters, Authentication & Authorization

• OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction

• Overloading is having multiple methods with the same name but different parameters

• Overriding is having a method in a subclass with the same name and parameters as a method in the superclass

• Interfaces define a set ...read more

MVC life cycle is a series of steps that occur when a request is made to an MVC application.

• Request is received by the routing engine

• Routing engine determines the controller and action to handle the request

• Controller is instantiated and action method is called

• Action method returns a view

• View is rendered and returned as a response