Question 1

What is the probability of getting a sum of 9 from two throws of a dice?

Accepted Answer

1/9 (There are 4 favorable outcomes: (3,6), (4,5), (5,4), (6,3) out of 36 possible outcomes).

Question 2

How do you handle errors in asynchronous code in Node.js?

Accepted Answer

In Node.js, handling errors in asynchronous code can be challenging but is essential for maintaining application stability. The common practices include using try/catch blocks with async/await syntax, or handling errors through callback functions or promise chains.

Here’s an example using async/await:
```javascript
const fs = require('fs').promises;

async function readFile(filePath) {
    try {
        const data = await fs.readFile(filePath, 'utf8');
        console.log(data);
    } catch (error) {
        console.error('Error reading file:', error);
    }
}

readFile('./example.txt');
```
In this example, if there's an error reading the file, it will be caught in the catch block. For traditional callback patterns, you can handle errors as follows:
```javascript
fs.readFile('./example.txt', 'utf8', (err, data) => {
    if (err) {
        console.error('Error reading file:', err);
        return;
    }
    console.log(data);
});
```
Using these patterns ensures that your application can gracefully handle unexpected conditions without crashing.

Question 3

Can you explain how middleware works in Express.js?

Accepted Answer

Middleware in Express.js is a function that has access to the request and response objects, and the next middleware function in the application’s request-response cycle. It can be used for adding functionality, such as logging, authentication, or modifying request/response objects.

Here's a simple example of middleware for logging requests:
```javascript
const express = require('express');
const app = express();

// Custom middleware for logging
app.use((req, res, next) => {
    console.log(`${req.method} ${req.url}`);
    next(); // Pass control to the next middleware
});

app.get('/', (req, res) => {
    res.send('Hello World!');
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});
```
In the code above, every request to the server will log the HTTP method and URL to the console before proceeding to the next middleware or route handler. This modular approach makes it easier to manage and organize your code.

Question 4

What is your proudest achievement?

Accepted Answer

'My proudest achievement was leading my college team in a national-level hackathon. We had to build a working prototype in 48 hours. I organized the team, delegated tasks based on everyone's strengths, and coded the frontend. Despite the intense pressure, we secured the 2nd runner-up position. It taught me a lot about leadership and teamwork.'

Tip: Relate it to your academics or extracurriculars.

Question 5

What is Amazon EC2?

Accepted Answer

A web service that provides secure, resizable compute capacity in the cloud.

SarthiQ

Interview Preparation Guide

HR Role
Questions & Answers

Document Details

Need Help?

Top HR Role Interview Questions

HR Role Interview Questions

A Software Engineer was asked

A Backend Developer was asked

Backend Developer

HR