Birlasoft Node Js Developer interview questions

Round 1: technical interview for 30 minute. interviewer was late by 7 minutes. first question asked was this-> let person=[{name:'birla',age:23}, {name:'lla',age:13}, {name:'lorem',age:23}, {name:'birla',age:23}, {name:'lla',age:99} ]; Round 2) Waiting for next round....