JavaScript Questions & Answers – Object Attributes and Serialization | JavaScript MCQs

var book = {
             	"main title": "JavaScript", 
              	'sub-title': "The Definitive Guide",
              	"for": "all audiences", 
             	author: { 
                        	firstname: "David",
                        	surname: "Flanagan"
                      }
       			};

book[datatype]=assignment_value;

function f() {};

o = {x:1, y:{z:[false,null,""]}};

s = JSON.stringify(o);

p = JSON.parse(s);

const object1 = {};
a = Symbol('a');  
b = Symbol.for('b');
object1[a] = 'harry'; 
object1[b] = 'derry';>
const objectSymbols = Object.getOwnPropertySymbols(object1);
console.log(objectSymbols.length);

const obj1 =
{ 
    property1: 21
	} 
const descriptor1 = Object.getOwnPropertyDescriptor(obj1, 'property1');  
console.log(descriptor1.configurable);
console.log(descriptor1.enumerable);

const obj1 = { property1: '10'};

const obj2 = Object.freeze(obj1);

obj2.property1 = '20';

console.log(obj2.property1);

const object1 = {
 	 property1: 20
	}; 
	console.log(Object.is(object1));

const obj = {prop: 12};
Object.preventExtensions(obj);
console.log( Object.isExtensible(obj));