Dassault Systemes Full Stack Developer Interview Questions and Answers

Q1. Questions about Nestjs, React and AI
Add your answer
Q2. Singlet pattern of NestJS
Ans. 
Singleton pattern in NestJS ensures a class has only one instance and provides a global point of access to it.
• Use the @Injectable() decorator to mark a class as a singleton in NestJS.

• Inject the singleton class into other classes using the constructor.

• The instance of the singleton class will be shared across the application.
Answered by AI
Add your answer

Q1. Project, Oops Concept, Java , which technology u have used ? Framework
Add your answer
Q2. Framework, Explain Long Polling ,
Ans. 
Long polling is a web technique where the client sends a request to the server and the server holds the connection open until new data is available.
• Long polling is a variation of the traditional polling technique where the client sends a request to the server and the server keeps the connection open until new data is available.

• It is often used in web applications to simulate real-time updates without the need for const...read more
Answered by AI
Add your answer
Q3. GraphQL Vs Rest
Ans. 
GraphQL is a query language for APIs that allows clients to request only the data they need, while REST is an architectural style for designing networked applications.
• GraphQL allows clients to request specific data in a single request, reducing over-fetching and under-fetching of data.

• REST uses multiple endpoints for different resources, leading to multiple requests for related data.

• GraphQL provides a strongly typed sc...read more
Answered by AI
Add your answer

Round duration - 110 Minutes
Round difficulty - Medium

Aptitude and coding and Ouput MCQ

Q1. 
Ways To Make Coin Change
Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make...read more
Ans. Recursion
 
1. The idea is to use recursion.
2. For a particular coin, we have two options either include it or exclude it.
3. If we include that coin, then calculate the remaining number that we have to generate so recur for that remaining number.
4. If we exclude that coin, then recur for the same amount that we have to make.
5. Our final answer would be the total number of ways either by including or excluding.
6. There will be two edg...read more
Answered Anonymously
Add your answer

Round duration - 60 minutes
Round difficulty - Easy

There were 2 interviewers. I was asked to make a presentation earlier which I had to present in the interview.

Questions on SQL, Javascript, Linux

In first round 4 coding question like 1 dsa 2 database and one is api and question is very simple . coding round was conducted in hackerrank

Q1. DSA QUESTION LIKE TREE AND GRAPH
Add your answer
Q2. DP AND SORTING APPROACH
Add your answer

Again same but dsa question and oops concept in deep level

2medium level questions

Q1. Project discussion for 30 mins
Add your answer
Q2. Dsa problem medium level
Add your answer

Q1. Rest Apis questions
Add your answer

Q1. Core java and OOPS and LLD
Add your answer

Q1. Something based on hashet
Add your answer
Q2. Same with this too
Add your answer

Basic questions were given..bar graphs,pie charts