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Venba Information Technology Node Js Backend Developer Interview Questions and Answers
Venba Information Technology Node Js Backend Developer Interview Experiences
1 interview found
Suseendhiran S
(1 Question)
- Q1. Why nodejs is asynchronous
- Ans.
Node.js is asynchronous to handle multiple requests efficiently without blocking the execution of other code.
Node.js uses non-blocking I/O operations to handle multiple requests concurrently.
Asynchronous programming allows Node.js to execute code while waiting for I/O operations to complete.
Node.js event loop helps in managing asynchronous operations efficiently.
Callbacks are commonly used in Node.js to handle asynchro...
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Interview questions from similar companies
(5 Questions)
- Q1. What is Node Js
- Ans.
Node.js is a runtime environment that allows you to run JavaScript code outside of a web browser.
Node.js is built on Chrome's V8 JavaScript engine.
It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.
Node.js is commonly used for building server-side applications and APIs.
It has a large ecosystem of open-source libraries and frameworks, such as Express.js.
- Q2. What is middleware
- Ans.
Middleware is a software component that acts as a bridge between an application's request and response.
Middleware functions have access to the request and response objects
They can modify the request and response objects
Middleware can be used for tasks like authentication, logging, error handling, etc.
- Q3. What is promise
- Ans.
A promise is an object representing the eventual completion or failure of an asynchronous operation.
Promises are used to handle asynchronous operations in JavaScript.
They can be in one of three states: pending, fulfilled, or rejected.
Promises can be chained using .then() to handle success and .catch() to handle errors.
Example: new Promise((resolve, reject) => { setTimeout(() => resolve('Done!'), 1000); });
- Q4. What is promise.all
- Ans.
promise.all is a method in JavaScript that takes an array of promises and returns a single promise that resolves when all of the input promises have resolved.
Used to handle multiple asynchronous operations at once
Returns a single promise that resolves when all input promises have resolved
If any of the input promises is rejected, the returned promise is rejected with the reason of the first rejected promise
- Q5. What is callback
- Ans.
A callback is a function passed as an argument to another function to be executed later.
Callbacks are commonly used in asynchronous programming to handle tasks that take time to complete.
They are often used in event handling, timers, and AJAX requests.
Callbacks can be synchronous or asynchronous, depending on when they are executed.
Example: setTimeout(callback, 1000) will execute the callback function after 1 second.
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in May 2024. There were 2 interview rounds.
(4 Questions)
- Q1. Questions Related to Basic JavaScript and Node.js, MongoDB, and Mongoose.js.
- Q2. Basic coding problem to test your JS skills.
- Q3. Mongoose aggregations, SQL Joins
- Q4. Problems on API endpoint
(1 Question)
- Q1. It is the same as that of the first round but with some intermediate-level questions.
Interview Preparation Tips
- There are no Special courses
- You need to prepare by yourself
- Maily use google and AI tools
I applied via Naukri.com and was interviewed in Jun 2023. There were 2 interview rounds.
(3 Questions)
- Q1. Simple nodejs javascript
- Q2. Average nodejs javascript mongodb mysql
- Q3. Average nodejs api design
- Ans.
The average Node.js API design involves creating modular and scalable code, using RESTful principles, and implementing error handling and authentication.
Use modular code structure to separate concerns and improve maintainability
Follow RESTful principles for designing API endpoints and handling HTTP methods
Implement error handling to provide meaningful error messages and handle exceptions
Include authentication mechanism...
Interview Preparation Tips
1st call HR agreed for my expected salary and 2 virtual interviews, then final salary discussion
Then HRs waited for me 2 clear 2 rounds , 2nd round with client almost 2hrs.
Then Hr played her game changed the expected salary to 10%hike from 30% and added 1 more tound of interview that too f2f.
Also told that result will be out that day itself.
Thrn they took 2 weeks to search for low budget, and finally after asking too many times told me not selected.
Horrible company horrible HRs.
Skills evaluated in this interview
Senior Backend Developer Interview Questions & Answers
Publicis Sapient
Anonymous
posted on 17 Oct 2024
Selected
I applied via Approached by Company and was interviewed in Sep 2024. There were 2 interview rounds.
MCQ Test and designing a application
(2 Questions)
- Q1. Multithreading basic and in depth architecture
- Q2. Serial and parallel stream in java
- Ans.
Serial and parallel streams in Java are used for processing collections of data in a sequential or parallel manner.
Serial streams process elements in a single thread, while parallel streams use multiple threads for faster processing.
Parallel streams can improve performance for large datasets by utilizing multiple cores of the processor.
Serial streams are suitable for smaller datasets or when order of processing is impo...
Interview Preparation Tips
- Multithreading
- Streams
- Java8
Skills evaluated in this interview
Salman Khan
I applied via Naukri.com and was interviewed in Apr 2024. There were 2 interview rounds.
It was related to Basic HTML and Node. Some questions are from regioning.
(1 Question)
- Q1. Given three tables Employee (Which contains employees' IDS and name), Project(Which contains IDs and name), and allocation (Which contains links employee to project via their IDs).Write a query to return a...
Backend Developer Interview Questions & Answers
Hexaware Technologies
Anonymous
posted on 24 Oct 2024
DSA - STRING AND ARRAY QUESTION
Interview Preparation Tips
Backend Operations Executive Interview Questions & Answers
Optum Global Solutions
Anonymous
posted on 1 Jun 2023
Selected
I applied via Naukri.com and was interviewed in Jul 2023. There were 3 interview rounds.
(2 Questions)
- Q1. Tell me about your self ?
- Q2. Why should we hire you?
(1 Question)
- Q1. Why should we hire you?
Interview Preparation Tips
2. Tailor your resume and cover letter.
3. Be prepared for anything.
4. Act kindly to everyone.
I applied via Referral and was interviewed in Sep 2022. There were 5 interview rounds.
(1 Question)
- Q1. Self Introduction about yourself
- Ans.
I am a Backend Associate with experience in developing and maintaining server-side applications.
Proficient in programming languages like Java and Python
Experience in working with databases like MySQL and MongoDB
Familiar with RESTful APIs and microservices architecture
Strong problem-solving and debugging skills
Ability to work in a team and collaborate effectively
(1 Question)
- Q1. How much you know about who's your admire person in your life ?
- Ans.
My admired person in life is my mother.
My mother has always been my source of inspiration and support.
She has taught me the values of hard work, perseverance, and kindness.
Her selflessness and dedication to her family and community are admirable.
She has overcome numerous challenges and always remains positive.
I strive to be like her in both my personal and professional life.
(1 Question)
- Q1. How much you have experienced, specify about your experience
- Ans.
I have 3 years of experience in backend development.
3 years of experience in backend development
Proficient in programming languages like Java and Python
Experience with databases like MySQL and MongoDB
Familiarity with RESTful APIs and web services
Knowledge of version control systems like Git
(1 Question)
- Q1. Do you have all document like your graduation and experience certificate
- Ans.
Yes, I have all the required documents.
I have my graduation certificate from XYZ University.
I also have experience certificates from my previous employers.
I can provide these documents upon request.
Interview Preparation Tips
Backend Developer Interview Questions & Answers
Virtusa Consulting Services
Anonymous
posted on 27 Jul 2022
(1 Question)
- Q1. Basics of Java, Spring boot and microservices
(1 Question)
- Q1. Java8, spring boot, microservices question at medium level tuff.
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