What is the output in index.js?

index.js

const fs = require("fs");
const { update } = require("./util");

const entries = ["one", "two"];

function doUpdate() {
  let fileContents = fs.readFileSync("./sample.json", "utf8");
  fileContents = update(fileContents, entries);
  console.log(entries); // what will this output?
}

doUpdate();

sample.json

{
  "entries": []
}

util.js

function update(fileContents, entries) {
  const json = JSON.parse(fileContents);
  
  entries.push("newEntry");
  
  entries.forEach((entry) => {
    json.entries.push(entry);
  });
  
  return JSON.stringify(json);
}

module.exports = {
 update 
};