🎯 16. Object.keys()

Returns all keys.

console.log(Object.keys(person));

Output: ["name","age"]

🚀 17. Object.values()

Returns all values.

console.log(Object.values(person));

Output: ["Deepak",25]

🔥 18. Object.entries()

Returns key-value pairs. console.log(Object.entries(person));

Output: [["name","Deepak"], ["age",25]]

📦 19. Destructuring Objects

Extract values easily.

const person = { name:"Deepak", age:25 };
const { name, age } = person;

⚡ 20. Spread Operator

Copy objects.

const person = { name:"Deepak" };
const updated = {...person, city:"Pune" };

🎯 Real Interview Example

Array of Objects

const employees = [
    { id:1, name:"John" },
    { id:2, name:"Mike" }
];
console.log(employees[0].name);

Output: John

⭐ Most Important Topics For Interviews

🔥 Arrays

🔥 Objects

🔥 map()

🔥 filter()

🔥 reduce()

🔥 Destructuring

🔥 Spread Operator

🔥 Object.keys()

🔥 Object.values()

🔥 Array of Objects

📝 Mini Practice Questions

Easy:

✅ Find largest number in array,

✅ Sum all array elements,

✅ Count array length

Medium:

✅ Remove duplicates,

✅ Find second largest number,

✅ Reverse array

Advanced:

✅ Group objects by property,

✅ Custom map() method,

✅ Flatten nested arrays

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