Question

Which one of the following is the correct output for the given JavaScript code?

const object1 ={};  

a = Symbol('a');  

b =Symbol.for('b');  

object1[a]='harry';  

object1[b]='derry';  

constobjectSymbols=Object.getOwnPropertySymbols(object1);  

console.log(objectSymbols.length);  

a) 0

b) 1

c) 2

d) Error

Answer 1

Answer: C

Reason: The method "Object.getOwnPropertySymbols()" used in the above program, returns a whole array of symbol properties, that are directly found on an object. In general, it returns an empty array, unless we have already set symbol properties on the object.