UNIT 5 WD

Which of the following is a feature of modern JavaScript?

• Closures

• Prototypes

• Promises & Async/Await

• All of the above

Which method is used to handle asynchronous operations in modern JavaScript?

• setTimeout()

• async/await

• clearInterval()

• document.write()

What does `use strict` do in JavaScript?

• Enables strict mode with stricter error handling

• Disables all errors

• Converts JavaScript to Java

• Limits memory usage

Which JavaScript feature allows functions to remember variables from their scope?

• Promises

• Closures

• Classes

• Modules

In JavaScript ES6, which keyword is used to create a block-scoped variable?

• var

• const

• static

• define

Everything in JavaScript is based on:

• Arrays

• Functions

• Objects

• Classes

The property of an object in JavaScript is a:

• Function only

• Variable only

• Key-value pair

• Array element

Which operator is used to access properties of an object?

• #

• @

• . (dot)

• ->

To check if a property exists in an object, we use:

• hasProperty()

• in operator

• contains()

• exist()

Which method copies all properties from one object to another?

• Object.assign()

• Object.copy()

• Object.join()

• Object.merge()