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Birlasoft Node Js Backend Developer Interview Questions and Answers

Updated 17 Dec 2021

6 Interview questions

A Node Js Backend Developer was asked
Q. Explain the Node.js architecture.
Ans. 

Node Js architecture is based on event-driven, non-blocking I/O model.

  • Event loop handles all I/O operations asynchronously

  • Single-threaded event loop allows for high scalability

  • Modules and packages can be easily added through NPM

  • Uses V8 engine for efficient JavaScript execution

A Node Js Backend Developer was asked
Q. What is Hoisting?
Ans. 

Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope.

  • Hoisting applies to variable declarations and function declarations

  • Variable declarations are hoisted but not their values

  • Function declarations are fully hoisted

  • Function expressions are not hoisted

  • Hoisting can lead to unexpected behavior and bugs

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A Node Js Backend Developer was asked
Q. Middle-ware in node js
Ans. 

Middleware is a software layer that sits between the application and the server, allowing for additional functionality to be added.

  • Middleware functions are executed sequentially, and can modify the request and response objects.

  • Common middleware includes body-parser, cookie-parser, and express-session.

  • Custom middleware can be created to add specific functionality to an application.

  • Middleware can be used for authent...

A Node Js Backend Developer was asked
Q. What are middlewares?
Ans. 

Middlewares are functions that have access to the request and response objects in Node.js, allowing for additional functionality to be added to the server.

  • Middlewares can be used to perform tasks like authentication, logging, error handling, etc.

  • They are executed in the order they are defined in the code.

  • Examples of middlewares include body-parser for parsing incoming request bodies, morgan for logging HTTP reques...

A Node Js Backend Developer was asked
Q. How does Node.js work?
Ans. 

Node.js is a runtime environment that allows JavaScript code to run on the server side.

  • Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient.

  • It uses the V8 JavaScript engine from Google Chrome to execute code.

  • Node.js allows developers to use JavaScript for both client-side and server-side development.

  • It has a large ecosystem of libraries and frameworks, such as Express.js for bu...

A Node Js Backend Developer was asked
Q. What is an Event Emitter in Node.js?
Ans. 

Event Emitter is a class in Node.js that allows objects to emit and listen for events.

  • Event Emitter is a core module in Node.js that provides an implementation of the observer pattern.

  • It allows multiple functions to be attached to a single event, which can be triggered synchronously or asynchronously.

  • Example: const EventEmitter = require('events');

  • Example: const myEmitter = new EventEmitter();

  • Example: myEmitter.on...

Birlasoft Node Js Backend Developer Interview Experiences

2 interviews found

I appeared for an interview in Oct 2021.

Round 1 - Video Call 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round that lasted for around 60 minutes. Questions were based on Node JS concepts.

  • Q1. How does Node.js work?
  • Ans. 

    Node.js is a runtime environment that allows JavaScript code to run on the server side.

    • Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient.

    • It uses the V8 JavaScript engine from Google Chrome to execute code.

    • Node.js allows developers to use JavaScript for both client-side and server-side development.

    • It has a large ecosystem of libraries and frameworks, such as Express.js for buildin...

  • Answered by AI
  • Q2. What are middlewares?
  • Ans. 

    Middlewares are functions that have access to the request and response objects in Node.js, allowing for additional functionality to be added to the server.

    • Middlewares can be used to perform tasks like authentication, logging, error handling, etc.

    • They are executed in the order they are defined in the code.

    • Examples of middlewares include body-parser for parsing incoming request bodies, morgan for logging HTTP requests, a...

  • Answered by AI
  • Q3. What is an Event Emitter in Node.js?
  • Ans. 

    Event Emitter is a class in Node.js that allows objects to emit and listen for events.

    • Event Emitter is a core module in Node.js that provides an implementation of the observer pattern.

    • It allows multiple functions to be attached to a single event, which can be triggered synchronously or asynchronously.

    • Example: const EventEmitter = require('events');

    • Example: const myEmitter = new EventEmitter();

    • Example: myEmitter.on('eve...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPABirlasoft Ltd. interview preparation:Topics to prepare for the interview - Node JS, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewRejected

Skills evaluated in this interview

Node Js Backend Developer Interview Questions & Answers

user image JAI PRAKASH KUMAR

posted on 25 Nov 2021

I applied via Naukri.com and was interviewed in Oct 2021. There was 1 interview round.

Interview Questionnaire 

5 Questions

  • Q1. Explain Node Js architecture.
  • Ans. 

    Node Js architecture is based on event-driven, non-blocking I/O model.

    • Event loop handles all I/O operations asynchronously

    • Single-threaded event loop allows for high scalability

    • Modules and packages can be easily added through NPM

    • Uses V8 engine for efficient JavaScript execution

  • Answered by AI
  • Q2. What is Hoisting ?
  • Ans. 

    Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope.

    • Hoisting applies to variable declarations and function declarations

    • Variable declarations are hoisted but not their values

    • Function declarations are fully hoisted

    • Function expressions are not hoisted

    • Hoisting can lead to unexpected behavior and bugs

  • Answered by AI
  • Q3. Async Queue
  • Q4. Event Emitter
  • Q5. Middle-ware in node js
  • Ans. 

    Middleware is a software layer that sits between the application and the server, allowing for additional functionality to be added.

    • Middleware functions are executed sequentially, and can modify the request and response objects.

    • Common middleware includes body-parser, cookie-parser, and express-session.

    • Custom middleware can be created to add specific functionality to an application.

    • Middleware can be used for authenticati...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - What you say be confident. If you explain more then you explain with examples.

Skills evaluated in this interview

Top trending discussions

View All
Interview Tips & Stories
6d (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
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Ask anonymously on communities.

Interview questions from similar companies

I applied via Campus Placement and was interviewed before Sep 2021. There were 4 interview rounds.

Round 1 - Aptitude Test 

Prepare normal for aptitude - maths, quant, analytic

Round 2 - Group Discussion 

My GD topic was Is internet good for students or not

Round 3 - Coding Test 

I didn't attempt this as I was noob back in third year Engg

Round 4 - HR 

(1 Question)

  • Q1. Basic questions can you relocate, tell me about ur GD and composition

Interview Preparation Tips

Interview preparation tips for other job seekers - Easy peasy give ur best. Prepare well. Hope u get the job. Phir tho google ka hi dream rhe gaya he mera.

Interview Questionnaire 

1 Question

  • Q1. About my college projects and about my passion

I applied via Job Portal and was interviewed in May 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Interview topics

Interview Preparation Tips

Interview preparation tips for other job seekers - Fundamentals Of Any Programming Language

I applied via Campus Placement and was interviewed before Apr 2021. There were 2 interview rounds.

Round 1 - Aptitude Test 

Aptitude, logical , reasoning, verbal

Round 2 - Technical 

(1 Question)

  • Q1. Dbms, Linked list , array, situation based

Interview Preparation Tips

Topics to prepare for LTIMindtree Software Engineer interview:
  • DBMS
  • Java
Interview preparation tips for other job seekers - Be confident while speaking.
Prepare DS, DBMS and OOPs concepts.

I applied via Naukri.com and was interviewed before Sep 2019. There were 6 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. IQ Test
  • Q2. Machine Test
  • Q3. Face To Face

Interview Preparation Tips

Interview preparation tips for other job seekers - basically there are 3 rounds:-
1. IQ Test
2. Machine Test
3. Face to Face

IQ Test is not so tough but prepare well Machine Test
Machine Test Question are like :-
Q.1 - We declare a variable in C++ like "is_this_a_variable" and in Java like "IsThisAVariable". There is underscore in between every word and first alphabet of every word is in lowercase in C++ and in Java first alphabet is in capital without underscore. Create a program in which if user input a string in a C++ variable format it will convert the input in java variable format.

Q2. Count the frequency of a string.
user input string - pqhphi
output-
p - 2
q - 1
h - 2
i - 1

Be strong in algorithms and data structure.
Are these interview questions helpful?

Interview Questionnaire 

1 Question

  • Q1. All about SQL joins,data warehouse.

Interview Preparation Tips

Interview preparation tips for other job seekers - Be prepared and answer only if you know the concept clearly.

Software Engineer Interview Questions & Answers

NTT Data user image NIDHI PRIYADARSHINI

posted on 9 Apr 2015

Interview Questionnaire 

6 Questions

  • Q1. Tell me about your project
  • Ans. 

    Developed a web-based project management tool for a startup

    • Used React for the frontend and Node.js for the backend

    • Implemented user authentication and authorization using JWT

    • Integrated with third-party APIs such as Trello and Slack

    • Implemented real-time updates using WebSockets

    • Deployed on AWS using EC2 and RDS

  • Answered by AI
  • Q2. Write the idea or algorithm for d program of fibonacci series
  • Q3. One question from your subject
  • Q4. Introduce yourself
  • Ans. 

    I am a software engineer with experience in developing web applications and mobile apps.

    • Proficient in programming languages such as Java, Python, and JavaScript

    • Skilled in using frameworks like React, Angular, and Spring Boot

    • Experienced in working with databases such as MySQL and MongoDB

    • Familiar with Agile development methodologies and DevOps practices

  • Answered by AI
  • Q5. If I give you a box full of pencils..in how many ways can you use it
  • Q6. Do you have any question for me

Interview Preparation Tips

Round: Test
Experience: Time management is very important to clear the aptitude test. Besides this a lot of practice is also very important.  This round is the major filteration round. Though each round is a major filteration round cuz NTT DATA is not a bulk recruiter like cts, infy etc. Almost 2-3 thousand students were there for this round from 6 different colleges and only 100 of them were selected.
Tips: Its better to start with the preparation from before and do consider the previous year placement papers available at indiabix. You can practice more n more. Apart from this you can go through the r.s aggarwal aptitude book also.

Round: Group Discussion
Experience: There were many panels and each panel had 10-12 students. The H.r first decided some other topic but when he asked wether everybody is aware of the topic ..there were few who didn't know about it. .so he picked up another topic. Fortunately he asked me to start with the discussion.  Always try to be the one to break the ice.
Tips: The only key to crack this round is that yku should talk. You should definitely not confuse gd with debate. You should not argue or by any chance shouldn't sound arrogant.

Round: Technical Interview
Experience: They will definitely ask about your project so be thorough with that. Ntt data is a Japanese company . Though this is IT but it will ask  from the subject of your own choice from people those who have a non IT background. After you get shortlisted in d gd they will give you a form to fill. Do fill that form without fail. If it is blank then even if u go to the hr round he will reject you.
Tips: Just be confident and always smile. Be careful on what you write in your resume cuz they can ask about anything based on your resume.

Round: HR Interview
Experience: This round was a cake walk. Just be confident and updated about the company.  Do ask him a question if he asks you to do that.but make sure it shouldn't be vague or out of the picture.
Tips: Keep smiling and don't get nervous.  If they ask you about location preferences,  dun get firm at one place.try to be flexible.

General Tips: Donot loose hope at any cost. You never know when your moment is going to arrive. Do practice the aptitude as much as you can. Finally NTT DATA selected only 50 overall in wch 11 were from my college n i was lucky to be one of them. the offer letter was issued the same day and we were all venerated.  Its just a game of confidence. All the best
Skill Tips: Try to add some co curricular activities and justify your role.
Skills: communication, technical knowledge, management skills, leadership
College Name: SATHYABAMA UNIVERSITY
Motivation: You will find the it companies mostly head quartered in U.S but this company is in Japan. Plus you have better opportunity and growth compared to other companies cuz its not a bulk recruiter.

Skills evaluated in this interview

Interview Questionnaire 

2 Questions

  • Q1. Java ( socket programming, OOPS, DS )
  • Q2. Write about your dream
  • Ans. 

    My dream is to build innovative software solutions that positively impact people's lives.

    • Developing cutting-edge technology

    • Creating user-friendly interfaces

    • Solving complex problems

    • Collaborating with talented individuals

    • Making a difference in society

    • Continuous learning and growth

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: GRE givers , you can make it through this. Brush up your technical skills for the programming section.
Tips: GRE quant and verbal and quick review from tutorialspoint.com would do the trick.

Round: Group Discussion
Experience: I had fun. I won a few debate competitions in various technical symposiums so, It gave a good experience about being quiet at the right moment.
Tips: Turn to your GRAB-ON mode. Never miss any chance. Learn to know when to be quiet and when to talk in a GD. Try to bring down the heat If two participants are getting into a argumentative discussion.

Round: Stress Interview
Experience: It was really difficult. Exactly after the GD, we were asked to right an essay in a very less time and our capability to manage the stress was observed.
Tips: Be calm and write all that you know in a presentable way.

Round: Technical Interview
Experience: I did a project in my 3rd year which included few concepts on Socket programming which helped me a bit in this round. I answered confidently and I was put to a confidence test too to see how sure I was about the answer.
Tips: A quick review on the day of interview and involving in friendly discussion about programming languages before the test helps.

Round: HR Interview
Experience: I was asked few technical questions in this round and later moved on to the general logical questions. Questions like, cutting a bread into multiple slices, finding the corresponding switch among 3 switches for 3 bulbs in room were asked. Find the sum of 1-10 in 4 seconds was asked suddenly. Thanks to Arithmetic Progressions :P.
Tips: Use your logical ability to answer.

Skills: Java, C, Body Language, Mental ability, Confidence.
College Name: Malla Reddy Institute of Engineering & Technology ( MRIET )
Motivation: Ranked among the top 50 of the Fortune 500. Expanding organizations which include lot of opportunities.

Birlasoft Interview FAQs

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