objects.md

Objects

1. let a=3; let b = new Number(3); let c=3;

   console.log(a == b); console.log(a === b); console.log(b === c);

   • A: true false true
   • B: false false true
   • C: true false false
   • D: false true true
   
   
   Answer

   Option: C

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2. What will be the output of the following code?

   const telegramGroup = {
      name: 'TeamDevkode'
   }
   const { name: TDK } = telegramGroup;
   
   console.log(TDK);

   • A: null
   • B: Error will be thrown
   • C: TeamDevkode
   • D: undefined
   
   
   Answer

   Option: C

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3. What will be the output?

   let myName = 'Sunny';
   let groupName = myName;
   
   myName = 'DevKode';
   console.log(groupName);
   
   
   const obj1 = {
       id:1,
       name:"Sunny",
   }
   
   const obj2 = obj1;
   obj2.name = 'DevKode';
   console.log(obj1);

   • A: Sunny , { id: 1, name: 'Sunny' }
   • B: DevKode,{ id: 1, name: 'Sunny' }
   • C: DevKode,{ id: 1, name: 'DevKode' }
   • D: Sunny,{ id: 1, name: 'DevKode' }
   
   
   Answer

   Option: D

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4. What will be the output?

    function greet(person) {
     if (person == { name: 'Narendra Modi' }) {
       return 'hey Narendra Modi'
     } else {
       return 'hey Donald Trump'
     }
   }
   
   console.log(greet({ name: 'Narendra Modi' }))

   • A: hey Narendra Modi
   • B: hey Donald Trump
   
   
   Answer

   Option: B

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5. What will be the output?

   const sample = ["xyz", "abc", "test", "ryan", "apple"];
   delete sample[3];
   console.log(sample.length);

   • A: 4
   • B: 5
   • C: Error updating the constant variable.
   
   
   Answer

   Option: B

---

What will be the output?

const fruits_obj = { 0 : "apple" , 1 : "mango" ,  2:"banana"};
const fruits_arr = ["apple","mango", "banana"];

console.log(typeof fruits_obj);
console.log(typeof fruits_arr);
console.log(fruits_obj == fruits_arr);

• A: Object , Array , False
• B: Object , Array , True
• C: Object , Object , False
• D: Object , Object , True

Answer

Option: C