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What is the purpose of using Symbols in JavaScript?

  • To create objects that can only be accessed by specific code
  • To add unique property keys to an object that won't collide with other keys (correct)
  • To hide information from the global registry
  • To create multiple instances of an object
  • What is the difference between Symbol() and Symbol.for()?

  • Symbol() and Symbol.for() are identical in function
  • Symbol() adds a symbol to the global registry, while Symbol.for() creates a new symbol
  • Symbol() creates a new symbol for a given key, while Symbol.for() returns a unique symbol every time it is called
  • Symbol() creates a new symbol every time it is called, while Symbol.for() returns the same symbol for a given key (correct)
  • What is the benefit of using Symbols for encapsulation?

  • It provides weak encapsulation and information hiding (correct)
  • It allows for multiple instances of an object to be created
  • It makes it easier to access object properties from other code
  • It provides strong encapsulation and information hiding
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