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Unico Connect Backend Developer Interview Questions and Answers

Updated 12 Nov 2024

12 Interview questions

A Backend Developer was asked 7mo ago
Q. Can you briefly explain the request-response cycle in Node.js?
Ans. 

The request-response cycle in node.js involves a client sending a request to a server, which processes the request and sends back a response.

  • Client sends a request to the server using HTTP methods like GET, POST, PUT, DELETE.

  • Server receives the request, processes it, and generates a response.

  • The response is sent back to the client, typically in the form of HTML, JSON, or other data formats.

  • Node.js uses event-drive...

A Backend Developer was asked 7mo ago
Q. What are the different authentication methods used in applications?
Ans. 

Different authentication methods include OAuth, JWT, Basic Auth, and OAuth2.

  • OAuth: Allows third-party applications to access resources without sharing credentials.

  • JWT (JSON Web Tokens): Securely transmit information between parties as a JSON object.

  • Basic Auth: Sends user credentials in the header of each request.

  • OAuth2: Authorization framework that enables a third-party application to obtain limited access to an H...

Backend Developer Interview Questions Asked at Other Companies

asked in NoBroker
Q1. Vertical Order Traversal of a Binary Tree Given a binary tree, yo ... read more
asked in Simpplr
Q2. Array Sum Calculation Calculate the sum of all elements in an arr ... read more
Q3. Given 9 balls, all of which weigh the same except for one, what i ... read more
asked in Simpplr
Q4. Remove Duplicates from String Problem Statement You are provided ... read more
asked in BlackNGreen
Q5. Reverse Words in a String: Problem Statement You are given a stri ... read more
A Backend Developer was asked 7mo ago
Q. What is your perception of no-code tools like XANO, and have you used any?
Ans. 

I believe no-code tools like XANO are great for rapid prototyping and simplifying development processes.

  • No-code tools like XANO allow for faster development by eliminating the need for manual coding

  • They are great for prototyping and testing ideas quickly

  • XANO specifically offers a visual interface for building backend logic without writing code

  • I have used XANO in a few projects and found it to be user-friendly and ...

A Backend Developer was asked 7mo ago
Q. Explain the key parameters in JWT (JSON Web Token).
Ans. 

JWT key parameters include header, payload, signature, and expiration time.

  • Header: Contains metadata about the token such as the type and hashing algorithm.

  • Payload: Contains claims or information about the user.

  • Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.

  • Expiration Time: Specifies the time after which the JWT expires and shou...

A Backend Developer was asked 7mo ago
Q. What are the major differences between Promises and Callbacks in Javascript?
Ans. 

Promises are objects representing the eventual completion or failure of an asynchronous operation, while callbacks are functions passed as arguments to be executed after a task is completed.

  • Promises allow chaining multiple asynchronous operations, while callbacks can lead to callback hell.

  • Promises have built-in error handling through .catch(), while callbacks rely on error-first callbacks.

  • Promises are easier to re...

A Backend Developer was asked 7mo ago
Q. What is your approach for handling large amounts of data?
Ans. 

My approach for Heavy Data Handling involves optimizing database queries, using indexing, caching, and implementing efficient algorithms.

  • Optimizing database queries by using proper indexing and avoiding unnecessary joins

  • Implementing caching mechanisms to reduce the load on the database

  • Using efficient algorithms for data processing and manipulation

  • Batch processing large datasets to minimize resource usage

  • Implementi...

A Backend Developer was asked 7mo ago
Q. What are the key considerations when designing a database in MongoDB?
Ans. 

Key considerations include data modeling, indexing, sharding, and replication.

  • Consider the data model carefully to ensure it fits the application's needs.

  • Use indexing to improve query performance.

  • Plan for sharding to distribute data across multiple servers for scalability.

  • Implement replication for high availability and fault tolerance.

Are these interview questions helpful?
A Backend Developer was asked 7mo ago
Q. Given a collection of user details, write a MongoDB query to increase the age by 20% for documents where the age field exists.
Ans. 

Mongo query to increase age by 20% for documents with age field

  • Use $exists operator to filter documents with age field

  • Use $mul operator to increase age by 20%

  • Example: db.users.updateMany({ age: { $exists: true } }, { $mul: { age: 1.2 } })

A Backend Developer was asked 7mo ago
Q. How does over-indexing affect MongoDB performance, and how can it be prevented?
Ans. 

Over-indexing in MongoDB can negatively impact performance by increasing memory usage and slowing down query execution.

  • Over-indexing can lead to increased memory usage as each index consumes memory.

  • Having too many indexes can slow down write operations as each index needs to be updated when a document is inserted, updated, or deleted.

  • To prevent over-indexing, carefully analyze query patterns and create indexes onl...

A Backend Developer was asked 7mo ago
Q. What are the key factors to consider when designing a database?
Ans. 

Key factors include data modeling, normalization, indexing, scalability, and performance.

  • Consider data modeling to ensure efficient storage and retrieval of data.

  • Normalize the database to reduce redundancy and improve data integrity.

  • Use indexing to speed up data retrieval operations.

  • Design for scalability to accommodate future growth and changes.

  • Optimize for performance by considering query optimization and data c...

Unico Connect Backend Developer Interview Experiences

1 interview found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Not Selected

I applied via Referral and was interviewed in Oct 2024. There were 3 interview rounds.

Round 1 - HR 

(1 Question)

  • Q1. Tell me About Yourself, Tech Stack, Salary expectations, location.
  • Ans. 

    I am a backend developer with expertise in Java, Spring Boot, and MySQL. I am looking for a competitive salary in a location with a strong tech community.

    • Experienced in Java, Spring Boot, and MySQL

    • Seeking competitive salary

    • Prefer location with strong tech community

  • Answered by AI
Round 2 - Technical 

(11 Questions)

  • Q1. Tell me about yourself ?
  • Q2. What are the key consideration when designing a database in Mongodb ?
  • Ans. 

    Key considerations include data modeling, indexing, sharding, and replication.

    • Consider the data model carefully to ensure it fits the application's needs.

    • Use indexing to improve query performance.

    • Plan for sharding to distribute data across multiple servers for scalability.

    • Implement replication for high availability and fault tolerance.

  • Answered by AI
  • Q3. How does over-indexing affect MongoDB performance, and how can it be prevented ?
  • Ans. 

    Over-indexing in MongoDB can negatively impact performance by increasing memory usage and slowing down query execution.

    • Over-indexing can lead to increased memory usage as each index consumes memory.

    • Having too many indexes can slow down write operations as each index needs to be updated when a document is inserted, updated, or deleted.

    • To prevent over-indexing, carefully analyze query patterns and create indexes only for...

  • Answered by AI
  • Q4. Given a collection of user details, write mongo query to increase the age by 20% for documents where age exists.
  • Ans. 

    Mongo query to increase age by 20% for documents with age field

    • Use $exists operator to filter documents with age field

    • Use $mul operator to increase age by 20%

    • Example: db.users.updateMany({ age: { $exists: true } }, { $mul: { age: 1.2 } })

  • Answered by AI
  • Q5. What are the different authentication methods used in applications ?
  • Ans. 

    Different authentication methods include OAuth, JWT, Basic Auth, and OAuth2.

    • OAuth: Allows third-party applications to access resources without sharing credentials.

    • JWT (JSON Web Tokens): Securely transmit information between parties as a JSON object.

    • Basic Auth: Sends user credentials in the header of each request.

    • OAuth2: Authorization framework that enables a third-party application to obtain limited access to an HTTP s...

  • Answered by AI
  • Q6. Explain the key parameters in JWT(JSON Web Token).
  • Ans. 

    JWT key parameters include header, payload, signature, and expiration time.

    • Header: Contains metadata about the token such as the type and hashing algorithm.

    • Payload: Contains claims or information about the user.

    • Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.

    • Expiration Time: Specifies the time after which the JWT expires and should no...

  • Answered by AI
  • Q7. What is your approach for Heavy Data Handling ?
  • Ans. 

    My approach for Heavy Data Handling involves optimizing database queries, using indexing, caching, and implementing efficient algorithms.

    • Optimizing database queries by using proper indexing and avoiding unnecessary joins

    • Implementing caching mechanisms to reduce the load on the database

    • Using efficient algorithms for data processing and manipulation

    • Batch processing large datasets to minimize resource usage

    • Implementing da...

  • Answered by AI
  • Q8. What are the major difference between Promises and Callbacks in Javascript ?
  • Ans. 

    Promises are objects representing the eventual completion or failure of an asynchronous operation, while callbacks are functions passed as arguments to be executed after a task is completed.

    • Promises allow chaining multiple asynchronous operations, while callbacks can lead to callback hell.

    • Promises have built-in error handling through .catch(), while callbacks rely on error-first callbacks.

    • Promises are easier to read an...

  • Answered by AI
  • Q9. Can you briefly explain the request-response cycle in node.js ?
  • Ans. 

    The request-response cycle in node.js involves a client sending a request to a server, which processes the request and sends back a response.

    • Client sends a request to the server using HTTP methods like GET, POST, PUT, DELETE.

    • Server receives the request, processes it, and generates a response.

    • The response is sent back to the client, typically in the form of HTML, JSON, or other data formats.

    • Node.js uses event-driven, no...

  • Answered by AI
  • Q10. In Redis, how would you retrieve all keys that contain the substring "xyz" ?
  • Ans. 

    Use the KEYS command in Redis to retrieve all keys containing a specific substring.

    • Use the KEYS command followed by the pattern '*xyz*' to retrieve all keys containing the substring 'xyz'.

    • Be cautious when using the KEYS command as it can be resource-intensive on large datasets.

    • Consider using SCAN command for better performance when dealing with large datasets.

  • Answered by AI
  • Q11. What is your perception of no-code tools(XANO), and have you used any ?
  • Ans. 

    I believe no-code tools like XANO are great for rapid prototyping and simplifying development processes.

    • No-code tools like XANO allow for faster development by eliminating the need for manual coding

    • They are great for prototyping and testing ideas quickly

    • XANO specifically offers a visual interface for building backend logic without writing code

    • I have used XANO in a few projects and found it to be user-friendly and effic...

  • Answered by AI
Round 3 - Behavioral 

(5 Questions)

  • Q1. Tell me about yourself
  • Ans. 

    I am a backend developer with 5 years of experience in building scalable and efficient web applications.

    • 5 years of experience in backend development

    • Proficient in languages like Java, Python, and Node.js

    • Strong understanding of database management systems such as MySQL and MongoDB

    • Experience in building RESTful APIs and microservices

    • Familiar with cloud technologies like AWS and Azure

  • Answered by AI
  • Q2. Can you discuss some recent projects you have worked on and your role in them ?
  • Ans. 

    I have worked on developing a real-time chat application and a data visualization tool for analyzing user behavior.

    • Developed a real-time chat application using Node.js, Socket.io, and MongoDB.

    • Created a data visualization tool using D3.js to analyze user behavior on a website.

    • Collaborated with front-end developers to integrate backend functionality with the user interface.

    • Implemented RESTful APIs for communication betwe...

  • Answered by AI
  • Q3. What are the key factors to consider when designing a database ?
  • Ans. 

    Key factors include data modeling, normalization, indexing, scalability, and performance.

    • Consider data modeling to ensure efficient storage and retrieval of data.

    • Normalize the database to reduce redundancy and improve data integrity.

    • Use indexing to speed up data retrieval operations.

    • Design for scalability to accommodate future growth and changes.

    • Optimize for performance by considering query optimization and data cachin...

  • Answered by AI
  • Q4. Have you worked with any no-code tools, such as Xano ? If yes, describe your experience.
  • Ans. 

    Yes, I have experience with Xano, a no-code backend development platform that simplifies API creation and database management.

    • Utilized Xano to build a RESTful API for a mobile application, streamlining data retrieval and management.

    • Leveraged Xano's database features to create and manage complex data relationships without writing SQL queries.

    • Integrated third-party services like Stripe for payment processing using Xano's...

  • Answered by AI
  • Q5. What is current CTC and what are your salary expectation for this role ?

Interview Preparation Tips

Interview preparation tips for other job seekers - I was not selected for this role.
1. Database Design is a favourite question, so make sure to prepare well for it, be ready with database queries.
2. I tend to over-explain when i can't recall specific terms, which sometimes leads to going too deep. It caused me to get stuck or blank out. So be concise with answers. If unsure, ask the interviewer if they wanted a deeper explanation or not.
3. If you have tried using Xano(no code platform) or built a simple server with it, that's a plus. It shows your interest and willingness to learn new tools.
4. Be confident during the CEO round, Keep eye contact and stay calm, even with difficult questions.

Skills evaluated in this interview

Top trending discussions

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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.
Got a question about Unico Connect ?
Ask anonymously on communities.

Interview questions from similar companies

I applied via Naukri.com and was interviewed in Sep 2019. There was 1 interview round.

Interview Questionnaire 

5 Questions

  • Q1. Question 1)Tell me about yourself and qualifications?
  • Ans. 

    I am a recent graduate with a degree in Computer Science and experience in web development.

    • Recent graduate with a degree in Computer Science

    • Experience in web development

    • Strong problem-solving skills

    • Proficient in programming languages such as Java, JavaScript, and HTML/CSS

  • Answered by AI
  • Q2. Question 2)What are your hobbies?
  • Ans. 

    My hobbies include reading, hiking, and playing the guitar.

    • Reading: I enjoy reading fiction and non-fiction books in my free time.

    • Hiking: I love exploring nature trails and challenging myself with new hikes.

    • Playing the guitar: I have been playing the guitar for several years and enjoy learning new songs.

  • Answered by AI
  • Q3. Question 3)What do you know about our company?
  • Ans. 

    Our company is a leading tech startup specializing in AI-driven solutions for businesses.

    • Specializes in AI-driven solutions for businesses

    • Considered a leading tech startup in the industry

    • Known for innovative and cutting-edge technology

    • Has a strong focus on research and development

    • Provides services to a wide range of industries

  • Answered by AI
  • Q4. Question 4) Why do you want to join our company?
  • Ans. 

    I want to join your company because of its innovative projects, strong company culture, and opportunities for growth.

    • Innovative projects that align with my interests and skills

    • Strong company culture that values collaboration and employee development

    • Opportunities for growth and advancement within the company

  • Answered by AI
  • Q5. Question 5) Tell me about your training and projects you have done in college?
  • Ans. 

    I completed various training programs and projects during my college years, gaining hands-on experience in different areas.

    • Completed a training program in data analysis using Python and R

    • Developed a mobile application for a class project using Java and Android Studio

    • Participated in a research project on renewable energy sources

    • Completed an internship at a local software company, working on web development projects

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Start by researching about the company and job profile you applied for. Practice common interview questions. Be confident. Ask questions at the end of the interview. Remember your CV details. Arrive on time and stay relaxed.

Backend Developer Interview Questions Asked at Other Companies

asked in NoBroker
Q1. Vertical Order Traversal of a Binary Tree Given a binary tree, yo ... read more
asked in Simpplr
Q2. Array Sum Calculation Calculate the sum of all elements in an arr ... read more
Q3. Given 9 balls, all of which weigh the same except for one, what i ... read more
asked in Simpplr
Q4. Remove Duplicates from String Problem Statement You are provided ... read more
asked in BlackNGreen
Q5. Reverse Words in a String: Problem Statement You are given a stri ... read more

I appeared for an interview before May 2016.

Interview Preparation Tips

Round: Resume Shortlist
Experience: I applied for an internship in your company through internshala.com . I got an email telling me that I was shortlisted it and now I have to fill this in order to move to the next round

I appeared for an interview in Jul 2017.

Interview Questionnaire 

1 Question

  • Q1. The first question was to introduce yourself and if have a past working experience then what was your profile in past internship?

Interview Preparation Tips

Round: Resume Shortlist
Experience: Hi, i applied from naukri.com for an internship in Ambition box and i got a mail that my resume got shortlisted and i have to revert them with my availability for an internship
Tips: always check your mail on time so that u don't miss it

Round: HR Interview
Experience: In the HR round u i was asked about my experience and learning about my previous internship and what do i know about digital marketing because that was my interest area.
Tips: Be confident and precise in your answers

Round: Test
Experience: i was asked to write about any topic in 15 minutes just to evaluate my writing skills and my idea of writing.
Tips: Be creative,quick and natural
Duration: 10 minutes
Total Questions: -3

Round: Group Activity
Experience: we have to present about in topic in front it can b any political or technical topic.so i present a technical topic
Tips: be confident,expressive and clear

Skills: Communication And Confidence, General Awareness, Inter Person Communication Skills, Interaction Skills
College Name: Babu Banarasi Das National Institute Of Technology And Management (BBDNITM)

I appeared for an interview in Jul 2017.

Interview Questionnaire 

3 Questions

  • Q1. Are You a Fresher? If not tell about your past working experience?
  • Ans. 

    Yes, I am a fresher with no past working experience.

    • I am a recent graduate looking to gain experience in the field.

    • I have completed internships or projects during my studies.

    • I am eager to learn and grow in a professional environment.

  • Answered by AI
  • Q2. What was your work profile in your past internship?
  • Ans. 

    I was responsible for conducting market research, creating social media content, and assisting with event planning.

    • Conducted market research to identify trends and opportunities

    • Created engaging social media content to increase brand awareness

    • Assisted in planning and executing events to promote company products/services

  • Answered by AI
  • Q3. Introduce yourself ?
  • Ans. 

    I am a recent graduate with a degree in Computer Science and a passion for coding and problem-solving.

    • Recent graduate with a degree in Computer Science

    • Passionate about coding and problem-solving

    • Strong communication and teamwork skills

    • Experience with programming languages such as Java, Python, and C++

  • Answered by AI

Interview Preparation Tips

Round: Resume Shortlist
Experience: Hi, i applied from naukri.com for internship in AmbitionBox.com..They checked my entire CV and checked about my eligibility criteria and then I got a mail stating .My resume has been shortlisted and i would get a call from Hr for the further steps.
Tips: Make your CV properly .

Round: HR Interview
Experience: In this round HR asked me about my working profile in my past internship..and about my likes ,dislikes and my skills and preffered working area.
Tips: Be cool ,be confident and be clear and interactive.

Round: Test
Experience: I was asked to read out my article...about the topic i chose to write..it can be any topic technical or political or anything ..i chose Movie reviews
Tips: write about the topic you know in details about. Be quick ,be clear
Duration: 10 minutes
Total Questions: -3

Round: Group Activity
Experience: In this round ,i was asked to prepare a presentation..about any topic you know in details about and share some news ideas
Tips: Be expressive and loud

Skills: Inter Person Communication Skills, Writing Skills, General Awareness, Self-Awareness
College Name: Babu Banarasi Das National Institute Of Technology And Management (BBDNITM)

Interview Preparation Tips

Round: Resume Shortlist
Experience: abt my work profile

General Tips: Be confident,be determined
Skills: Communication, Body Language, Problem Solving

I applied via Approached by Company and was interviewed in Jul 2017. There were 5 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. They call us for a face to face interview initially they interviewed about my personal intrest,hobbies

Interview Preparation Tips

Round: Resume Shortlist
Experience: On the basis of my profile at naukri.com

Round: Test
Experience: presentation round

General Tips: Be confident ,attentive and focussed.
Skills: Communication, Body Language, Leadership, Presentation Skills, Decision Making Skills
Duration: <1 week
Are these interview questions helpful?

I applied via Other and was interviewed in Jan 2018. There were 5 interview rounds.

Interview Preparation Tips

General Tips: The interview process lasted for 2 hours. I was given an hour for the test and the interviewer made sure that the interviewee felt at ease giving the interview. The interviewer went through my resume and held a discussion on my projects and the course I'm pursuing.
They look for your analytical, problem solving, decision making skills.
In the end everyone gave their best wishes, I thanked everyone and left the room.
Skills: Analytical Skills, Time Management, Decision Making Skills
Duration: <1 week

Intern Interview Questions & Answers

AmbitionBox user image Akshay Sharma

posted on 24 Jan 2018

I applied via Other and was interviewed in Jan 2018. There were 5 interview rounds.

Interview Preparation Tips

General Tips: Interview was lasted for about 2 hours.I was given an hour for the test,they tested my problem solving, analytical ,decision making skills. The interviewer asked question related to my area and in the end wished me best of luck.
Skills: Communication
Duration: <1 week

Interview Questionnaire 

1 Question

  • Q1. What certifications should a software developer have?
  • Ans. 

    Certifications are not mandatory for software developers, but can add value to their resume.

    • Certifications in programming languages like Java, Python, C++

    • Certifications in software development methodologies like Agile, Scrum

    • Certifications in cloud computing platforms like AWS, Azure

    • Certifications in security like CISSP, CEH

    • Certifications in project management like PMP

    • Certifications in mobile app development like Androi...

  • Answered by AI

Unico Connect Interview FAQs

How many rounds are there in Unico Connect Backend Developer interview?
Unico Connect interview process usually has 3 rounds. The most common rounds in the Unico Connect interview process are HR, Technical and Behavioral.
How to prepare for Unico Connect Backend Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Unico Connect . The most common topics and skills that interviewers at Unico Connect expect are Laravel, PHP, RDBMS and Redis.
What are the top questions asked in Unico Connect Backend Developer interview?

Some of the top questions asked at the Unico Connect Backend Developer interview -

  1. Given a collection of user details, write mongo query to increase the age by 20...read more
  2. What is your perception of no-code tools(XANO), and have you used an...read more
  3. What are the major difference between Promises and Callbacks in Javascrip...read more

Tell us how to improve this page.

Overall Interview Experience Rating

4/5

based on 1 interview experience

Difficulty level

Moderate 100%

Duration

2-4 weeks 100%
View more

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