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Devship Mern Full Stack Developer Interview Questions and Answers
6 Interview questions
Yes, I have experience with file upload tasks. Files are saved in DB by storing the file path and retrieval is done by fetching the file path from the DB.
Used multer middleware in Node.js to handle file uploads
Saved file path in MongoDB using Mongoose schema
Retrieved file by querying the database for the file path
Implemented file upload functionality in a project using React for the front end
React hooks are functions that let you use state and other React features in functional components.
Allow functional components to have state and lifecycle methods
Replace class components with simpler functional components
Examples: useState, useEffect, useContext
Developed a real-time chat application using Node.js with Socket.io for instant messaging functionality.
Implemented server-side logic using Node.js to handle incoming messages and broadcast them to all connected clients
Utilized Socket.io library to establish WebSocket connections for real-time communication
Integrated with MongoDB to store chat messages and user information
Implemented authentication and authorizati...
They are used in MongoDB aggregation pipeline to perform various operations like joining, filtering, projecting, etc.
Used in MongoDB aggregation pipeline for data manipulation
Perform operations like joining, filtering, projecting, etc.
Help in combining data from multiple collections
Use $lookup to perform a left outer join between two collections
CRUD operations in MongoDB include create, read, update, and delete operations on documents in a collection.
Create: db.collection.insertOne()
Read: db.collection.find()
Update: db.collection.updateOne()
Delete: db.collection.deleteOne()
Redux is a predictable state container for JavaScript apps, used to manage application state in a centralized store.
Redux helps manage the state of an application in a predictable way
It allows for a single source of truth for the state of the application
Redux is commonly used with React to manage the state of components
Actions are dispatched to update the state in Redux store
Reducers specify how the state changes ...
Devship Mern Full Stack Developer Interview Experiences
1 interview found
Anonymous
I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
(8 Questions)
- Q1. What are react hooks and explain with a usecase
- Q2. What is Redux and why its used
- Ans.
Redux is a predictable state container for JavaScript apps, used to manage application state in a centralized store.
Redux helps manage the state of an application in a predictable way
It allows for a single source of truth for the state of the application
Redux is commonly used with React to manage the state of components
Actions are dispatched to update the state in Redux store
Reducers specify how the state changes in re...
- Q3. Have you worked on any file upload tasks previously ? Explain the process and how it saved in DB and retrieval process
- Ans.
Yes, I have experience with file upload tasks. Files are saved in DB by storing the file path and retrieval is done by fetching the file path from the DB.
Used multer middleware in Node.js to handle file uploads
Saved file path in MongoDB using Mongoose schema
Retrieved file by querying the database for the file path
Implemented file upload functionality in a project using React for the front end
- Q4. Give some crud operations in Mongo db
- Ans.
CRUD operations in MongoDB include create, read, update, and delete operations on documents in a collection.
Create: db.collection.insertOne()
Read: db.collection.find()
Update: db.collection.updateOne()
Delete: db.collection.deleteOne()
- Q5. What is aggregation
- Ans.
Aggregation is the process of combining data from multiple sources to provide a summary or overview.
Aggregation in databases involves grouping and summarizing data to provide insights.
In MongoDB, aggregation pipelines are used to process data and return computed results.
Examples of aggregation functions include sum, average, count, and group by.
- Q6. Why $lookup , $project , ..ect are used ?
- Ans.
They are used in MongoDB aggregation pipeline to perform various operations like joining, filtering, projecting, etc.
Used in MongoDB aggregation pipeline for data manipulation
Perform operations like joining, filtering, projecting, etc.
Help in combining data from multiple collections
Use $lookup to perform a left outer join between two collections
- Q7. Share your experience / task you worked on Node js
- Ans.
Developed a real-time chat application using Node.js with Socket.io for instant messaging functionality.
Implemented server-side logic using Node.js to handle incoming messages and broadcast them to all connected clients
Utilized Socket.io library to establish WebSocket connections for real-time communication
Integrated with MongoDB to store chat messages and user information
Implemented authentication and authorization me...
- Q8. Explain your project experience worked so far
Skills evaluated in this interview
Top trending discussions
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I applied via Referral and was interviewed before Jan 2021. There was 1 interview round.
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- Q1. What is abstract class, what is list, SQL,ADO.net
- Ans.
Abstract class is a class that cannot be instantiated, List is a collection of objects, SQL is a language used to manage databases, ADO.net is a framework for accessing databases.
Abstract class is used as a base class for other classes
List is a generic collection of objects
SQL is used to create, modify, and query databases
ADO.net provides a set of classes for accessing databases
Example: abstract class Animal { public a...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Campus Placement and was interviewed before May 2021. There were 4 interview rounds.
VERBAL QUANT DI/LR and Picture based test
(1 Question)
- Q1. Write a fibonaci series in c++ or C?
- Ans.
Fibonacci series can be easily implemented using loops in C++ or C.
Declare variables for first two numbers of the series
Use a loop to calculate and print the next number in the series
Repeat the loop until desired number of terms are printed
(1 Question)
- Q1. Informed about the policies and made us sign a document
Interview Preparation Tips
Skills evaluated in this interview
I appeared for an interview before Sep 2020.
Round duration - 90 minutes
Round difficulty - Easy
This round was held during university hours and consisted of 2 coding questions.
(1 Question)
Round duration - 120 minutes
Round difficulty - Easy
Make sure you do no cutting and are clear about the approach you'd be following.
- Q1. What is the running median of an input stream?
- Ans.
Running median of an input stream is the median value of the numbers seen so far in a continuous stream of data.
Maintain two heaps - a max heap for the lower half of the numbers and a min heap for the upper half.
Keep the number of elements in the two heaps balanced or differ by at most 1.
If the total number of elements is odd, the median is the root of the max heap. If even, it is the average of the roots of the two he...
Interview Preparation Tips
Prepare for company-wise interview questions according to the company in which you are applying. Try to write the code yourself and if got stuck in between then take help from the internet. I recommend you Codezen of Coding Ninjas for practicing Data Structures and Algorithms based questions.
Application resume tips for other job seekersBe sure 100% of what you write in your resume and prepare for that before the interview what is written on resume.
Final outcome of the interviewSelectedSkills evaluated in this interview
I applied via Walk-in and was interviewed before Feb 2021. There were 3 interview rounds.
(7 Questions)
- Q1. Share details of your previous job.
- Q2. Why should we hire you?
- Q3. What are your salary expectations?
- Q4. What is your family background?
- Q5. What are your strengths and weaknesses?
- Q6. Tell me about yourself.
- Q7. This opportunity is really excited for me
(7 Questions)
- Q1. What are your salary expectations?
- Q2. What is your family background?
- Q3. Share details of your previous job.
- Q4. What are your strengths and weaknesses?
- Q5. Tell me about yourself.
- Q6. Describe any difficult work situation or project that you have handled
- Ans.
Handled a difficult project involving complex data migration and integration
Had to understand the existing data structure and map it to the new system
Dealt with multiple data sources and formats
Ensured data integrity and accuracy throughout the migration process
Collaborated with cross-functional teams to ensure successful integration
Implemented automated testing to validate data migration and integration
Managed project...
- Q7. Hard work and smart work
- Ans. Reaching the building through steps is hard work ,smart work life is smart 6 the uses steps definitely .. reach the destination
Interview Preparation Tips
- Software developer
- Flash Animation
- 3D Character Animation
- Photography
- Photoshop
- Basic
- Logo Design
I applied via Referral and was interviewed before Jun 2021. There were 2 interview rounds.
Java, program logic, software engineering
Interview Preparation Tips
- Java
Trisha Kundu
I applied via Campus Placement and was interviewed in Apr 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. Are you willing to relocate?
- Q2. Why should I hire you?
Interview Preparation Tips
I applied via Naukri.com and was interviewed in May 2020. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Basic question tell me about yourself
Interview Preparation Tips
punit kumar
Interview Questionnaire
1 Question
- Q1. Sql joins
Interview Preparation Tips
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