Senior Software Developer

A closure is the result of combining a function with the lexical environment in which it was declared. It is an inner function that has access to the variables of the outer or enclosing function. There are three scope chains in the closure:
1. Variables are defined between curly brackets in its own scope.
2. Variables in the outer function
3. Variables at the global level

Prototype chaining is a technique for creating new items from existing ones. In a class-based language, it's similar to inheritance.
Object.getPrototypeOf(object) or the proto property can be used to get the prototype of an object instance, whereas Object.prototype can be used to retrieve the prototype of a constructor function.

1. Slice Doesn't modify the original array(immutable) while Splice Modifies the original array(mutable). 
2. Slice returns the subset of original array while splice returns the deleted elements as array
3. Slice is used to pick the elements from array. Splice is used to insert or delete elements to/from array

Context may be used directly in your application and is ideal for passing data down to deeply nested components, which is exactly what it was meant for.
Redux, on the other hand, is far more powerful and has many features that the Context API does not. React Redux also uses context internally, but this isn't disclosed in the public API.

React components are built around states. States serve as a data source and should be made as basic as feasible. In a nutshell, states are the objects that determine how components are rendered and behave. They, unlike the props, are malleable and produce dynamic and interactive elements. This is how you get to them. state().