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Duplex Technology Interview Questions, Process, and Tips
Duplex Technology Interview Experiences
1 interview found
Selected
I applied via Walk-in and was interviewed before Oct 2023. There were 2 interview rounds.
(6 Questions)
- Q1. About the Project
- Q2. Basic in JavaScript , Event Loop , Asynchronous Programming, closures , Mongodb Aggregation Pipile
- Q3. Diff b/w sql / nosql
- Ans.
SQL is a relational database management system, while NoSQL is a non-relational database management system.
SQL databases are table-based and have a predefined schema, while NoSQL databases are document-based, key-value pairs, graph databases, or wide-column stores.
SQL databases are good for complex queries and transactions, while NoSQL databases are better for hierarchical data storage.
Examples of SQL databases include...
- Q4. Asking about the Nest.js middleware
- Q5. Nest.js Pipiline , Gaurd
- Q6. Given me the coding Question to resolve the multiple promiss in using promiss.all()
(9 Questions)
- Q1. React js ( vertual Dom , Real Dom )
- Q2. Feature of React using advanced and disadvantage
- Ans.
React's advanced feature is virtual DOM for efficient rendering, but it can be complex for beginners.
Virtual DOM allows React to update only the necessary parts of the actual DOM, improving performance.
Advanced state management with tools like Redux or Context API.
Server-side rendering for better SEO and initial load performance.
Component-based architecture for reusability and maintainability.
Complex learning curve for...
- Q3. Hooks, React life cycle
- Q4. UseMemo , use of useMemo
- Q5. UseRef , forwordRef , both uses and example
- Q6. Coding question gives me create excel sheet to fill the data Drag and drop the Data
- Q7. Create multiselect dropdown with scrach , one select have to choose the other dropdown option
- Q8. Implement the file uploads system coding task multiselect file uplods
- Ans.
Implementing a multiselect file upload system for a MERN stack application.
Use a library like Multer for handling file uploads in Node.js
Create a form in React with multiple file input fields for selecting multiple files
Send the selected files to the server using a POST request
Handle the file uploads on the server side and save them to a designated folder
- Q9. Create product , perform curd opration , make the suggetion in this cart
- Ans.
Create a product cart with CRUD operations and suggestion feature.
Create a database schema for products
Implement CRUD operations for adding, updating, and deleting products
Implement a suggestion feature based on user preferences or past purchases
Skills evaluated in this interview
Mern Stack Developer Interview Questions asked at other Companies
Interview questions from similar companies
Senior Software Engineer Interview Questions & Answers
Tech Mahindra
Anonymous
posted on 14 May 2022
I applied via Naukri.com and was interviewed before May 2021. There was 1 interview round.
(1 Question)
- Q1. Discuss 4 case study related to supply chain management.
Interview Preparation Tips
- Supply Chain Management
I applied via Walk-in and was interviewed before Apr 2020. There were 5 interview rounds.
Interview Questionnaire
1 Question
- Q1. What is Excel what is vlookup what is your strength and weakness
Interview Preparation Tips
I was interviewed before Sep 2020.
(1 Question)
Round duration - 140 minutes
Round difficulty - Medium
Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.
- Q1.
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...
- Ans.
Given two numbers represented as arrays, calculate their sum and return the result as an array.
Iterate through the arrays from right to left, adding digits and carrying over if necessary
Handle cases where one array is longer than the other by considering the remaining digits
Ensure the final sum array does not have any leading zeros
Round duration - 20 minutes
Round difficulty - Easy
The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.
Round duration - 8 minutes
Round difficulty - Easy
This round was conducted right after finishing and clearing the technical round at the same place and on the same day.
Interview Preparation Tips
Tip 1 : Practice atleast 2-3 Coding problems daily so your logic building becomes stronger.
Tip 2 : Exercise problems based on OOPS concepts and others too.
Tip 3 : If you can have your own project built, then it's the major point and will act as a plus point.
Tip 1 : Your resume should be in standard form, short and simple will be more effective.
Tip 2 : Whatever you have learned, you need to mention it in your resume as that will be your primary source of selection and having project on your resume is important.
Skills evaluated in this interview
I applied via Recruitment Consultant and was interviewed before Sep 2020. There were 3 interview rounds.
Interview Questionnaire
3 Questions
- Q1. 1. Why do you want to change?
- Q2. 2. What is your goal?
- Q3. 3. Critical project you have handled?
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Jul 2020. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. SOLID principals, oops, c# basics, SQL server, azure, design pattern
Interview Preparation Tips
I applied via Job Portal and was interviewed before Apr 2021. There was 1 interview round.
(1 Question)
- Q1. Solid principles in c#
- Ans.
Solid principles are a set of design principles for writing maintainable and scalable code in C#.
Single Responsibility Principle (SRP) - a class should have only one reason to change
Open/Closed Principle (OCP) - a class should be open for extension but closed for modification
Liskov Substitution Principle (LSP) - derived classes should be substitutable for their base classes
Interface Segregation Principle (ISP) - client...
Interview Preparation Tips
Skills evaluated in this interview
I applied via Campus Placement and was interviewed before May 2020. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. Tell me about yourself
Interview Preparation Tips
I applied via Naukri.com and was interviewed before Apr 2020. There were 5 interview rounds.
Interview Questionnaire
1 Question
- Q1. Basic questions only ... regarding job and experience
Interview Preparation Tips
I applied via Campus Placement and was interviewed before Jan 2020. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. First question in hr interview is tell about yourself then the hr asked questions what I mentioned in my resume. So put the information in resume what you known well. My unique talent is I'm a stage spea...
Interview Preparation Tips
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