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Home » Quiz » ES6 Quiz

A Map in JavaScript can have keys of any type, unlike an object which has keys of type _________.

Difficulty level
  • any
  • varied
  • string
  • object
Unlike objects, where keys are converted to strings, a Map in JavaScript can have keys of any data type. So, the correct answer is string.
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ES6 Quiz
Quiz
To access a parent class's method in a child class, the __________ keyword is used inside the method.
How does the rest operator differ from the spread operator in its syntax?

Related Quiz

  • If you have a Symbol mySymbol, you can access its description using mySymbol.__________.
  • In ES6, which method is commonly used as a higher-order function for arrays?
  • In a class hierarchy, if a method is overridden, how can you call the method from the parent class?
  • Which keyword is used to define a class in ES6?
  • In a class, static properties can be accessed using the class name followed by _________.

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