JavaScript Interview

• What is JavaScript? NodeJS ?

• Hoisting

• Global / Local / Block Scope

• Prototype

• Closure

• OOPS Concept

  • Class
  • Inheritance
  • Polymorphism
  • Encapsulation
  • Abstractions

• For in / For of Loop

• This

• Polyfill

• Binding

  • Implicit
  • Explicit
    • call()
    • apply()
    • bind()

• Event Loop (Execution Context)

  • Tempory Zone
  • setTimeout()
  • setInterval()

• Currying

• == or ===

• ES6

  • let/const
  • Arrow functions
  • For Each Loop
  • map()
  • fetch()
  • reduce()
  • Rest Operators (parameters)
  • Spread operators
  • Ternary Operators
  • Destructuring

• Callbacks

• Promises

  • Pending
  • Fullfilled
  • Reject
  • Promise.all()

• Async/Await