Where can I discover JavaScript coding challenges commonly used in interviews? [closed]

/* Group items on the basis of age of given array of object */

const people = [
    { name: "John", age: 21 },
        { name: "Max", age: 20 },
        { name: "Alexa", age: 20 }
];

const groupBy = (arr) => {
  // Write code here
  
  return;
};


console.log(groupBy(people)); 
// Output
/* 
{
    '20': [ { name: "Max", age: 20 }, { name: "Alexa", age: 20 } ],
        '21': [ { name: "John", age: 21 } ]
}
 */

Where I can find this type of JS coding challenges for Interviews?
I want to practice this types of question which mostly asked in frontend interviews