Lets say I have some nodejs questions:

ask-questions.js

const arrQuestions = [
  "what is your age?",
  "what is your gender?",
  "where do you live?",
];
let ind = 0;

const total = arrQuestions.length
process.stdin.on("data", (data) => {
  if ( ind >= arrQuestions.length) {
    console.log("process - NO MORE QUESTIONS - EXIT!");
    process.exit();
  }
  process.stdout.write(`${arrQuestions.at(ind++)}n`);
});

process.stdout.write(`${arrQuestions.at(ind++)}n`);

module.exports = {
  arrQuestions,
};

When I run: node questions.js

• stdout: What is your age?

• user input: 2n

• stdout: What is your gender?

• user input: 2n

• stdout: Where do you live?

• user input: 2n

• stdout: process – NO MORE QUESTIONS – EXIT!

• process.exit()

How do I write to the stdin of this process with the following code?:

spawn-questions.js

const { arrQuestions } = require("./ask-questions");
const path = require("path");
const spawn = require("child_process").spawn;

const arrUserInput = [];
const childProcess = spawn(
  "node",
  [path.join(__dirname, "node-questions.js")],
  { env: process.env }
); 


// These do nothing. 
childProcess.stdout.write("answer 1 from spawnern");
childProcess.stdout.write("answer 2 from spawnern");
childProcess.stdout.write("answer 3 from spawnern");

childProcess.stdin.write("answer from spawnern");
childProcess.stdin.write("answer from spawnern");
childProcess.stdin.write("answer from spawnern");

// expect exit

I want to automate programmatically the user input above to trigger the next question.
How do I do that?