Dassault Systemes Java Full Stack Developer Interview Questions and Answers

It was like 5 MCQ and two coding questions with difficult level of moderate

Q1. They asked questions from DSA,sql and some web technology which I mentioned in my resume
Add your answer
Q2. What is the life cycle of react components?
Ans. 
React components go through various stages in their life cycle, from initialization to destruction.
• Initialization: Component is created and initialized with default props and state.

• Mounting: Component is rendered on the DOM for the first time.

• Updating: Component re-renders when props or state change.

• Unmounting: Component is removed from the DOM.

• Examples: componentDidMount() for mounting, componentDidUpdate() for updati
Answered by AI
Add your answer

Q1. Asked about my project and some behavioural questions
Add your answer

2 hours of duration and medium level leetcode questions

Q1. What do you mean by os?
Ans. 
OS stands for Operating System. It is a software that manages computer hardware and provides services for computer programs.
• OS is the software that acts as an intermediary between computer hardware and user applications.

• It manages computer resources such as memory, processors, devices, and file systems.

• Examples of popular operating systems include Windows, macOS, Linux, and Android.
Answered by AI
Add your answer
Q2. How can deadlock be avoided?
Ans. 
Deadlock can be avoided by implementing proper resource allocation strategies and using techniques like deadlock prevention, avoidance, detection, and recovery.
• Implement proper resource allocation strategies such as resource ordering, wait-die, wound-wait, etc.

• Use techniques like deadlock prevention by ensuring that the system never enters a deadlock state, avoidance by ensuring that the system does not enter an unsafe...read more
Answered by AI
Add your answer

Aptitude Java CI/CD DevOps Unit testing HTML CSS

Q1. Technical questions same as above Puzzles to assess problem solving abilities
Add your answer

Q1. General questions around CTC and expectations
Add your answer

Q1. What is oops, Mostly Debugging Questions
Add your answer
Q2. Pointers, Memory Allocation
Add your answer

Topics: maps, sorting and simple DSA question

Q1. What is linked list? How it is stored in memory? Give real examples of linked-list.
Ans. 
A linked list is a data structure where each element points to the next element in the sequence.
• Linked list is stored in memory as nodes, where each node contains data and a reference to the next node.

• Examples of linked-list include a singly linked list, doubly linked list, and circular linked list.

• In a singly linked list, each node points to the next node. In a doubly linked list, each node points to both the next and
Answered by AI
Add your answer
Q2. How does ML models are built?
Ans. 
ML models are built by collecting and preparing data, selecting a model, training the model on the data, and evaluating its performance.
• Collect and prepare data by cleaning, transforming, and encoding it

• Select a model based on the problem at hand (e.g. regression, classification, clustering)

• Train the model using algorithms like linear regression, decision trees, or neural networks

• Evaluate the model's performance using ...read more
Answered by AI
Add your answer
Q3. Difference between array and linked list.
Ans. 
Arrays store elements in contiguous memory locations, while linked lists store elements in nodes with pointers to the next node.
• Arrays have fixed size, while linked lists can dynamically grow or shrink.

• Accessing elements in arrays is faster (O(1)), while accessing elements in linked lists is slower (O(n)).

• Inserting or deleting elements in arrays can be inefficient, as it may require shifting elements, while in linked l...read more
Answered by AI
Add your answer

Q1. Given string s, return string y which stores first occurrence of characters of s .
Ans. 
Return a string containing the first occurrence of characters in the input string.
• Create an empty string to store the result.

• Iterate through each character in the input string.

• If the character is not already in the result string, add it to the result string.

• Return the result string.
Answered by AI
Add your answer
Q2. Describe the hardest DSA questions you have ever done.
Ans. 
One of the hardest DSA questions I have done involved implementing a complex graph traversal algorithm.
• The question required understanding of graph data structures and algorithms.

• I had to implement a depth-first search or breadth-first search algorithm.

• The question may have involved finding the shortest path in a weighted graph.

• I had to consider edge cases and optimize the algorithm for efficiency.
Answered by AI
Add your answer

Q1. What are your hobbies, plans for future after 5 years?
Add your answer

Round duration - 90 minutes
Round difficulty - Easy

Timing - 10AM-11:30AM
Online proctored test

Q1. 
Binary Tree Right View Problem Statement
Given a binary tree of integers, your task is to print the right view of it. The right view represents a set of nodes visible when the tree is viewed from the righ...read more
Ans. 
The task is to print the right view of a binary tree, representing nodes visible from the right side in top-to-bottom order.
• Traverse the tree level by level and keep track of the rightmost node at each level

• Print the rightmost node of each level to get the right view of the tree

• Use a queue for level order traversal and a map to store the rightmost nodes
Answered by AI
Add your answer
Q2. 
0/1 Knapsack Problem Statement
A thief is planning to rob a store and can carry a maximum weight of 'W' in his knapsack. The store contains 'N' items where the ith item has a weight of 'wi' and a value of...read more
Ans. 
Yes, the 0/1 Knapsack problem can be solved using dynamic programming with a space complexity of not more than O(W).
• Use a 1D array to store the maximum value that can be stolen for each weight from 0 to W.

• Iterate through each item and update the array based on whether including the item would increase the total value.

• The final value in the array at index W will be the maximum value that can be stolen.
Answered by AI
Add your answer

Round duration - 45 minutes
Round difficulty - Medium

Timing : 4PM-5PM
Environment - Online

There was a panel of 3 interviewers

Q1. How can you find the size of an array in C or C++ without using sizeof or any standard function?
Ans. 
You can find the size of an array in C or C++ by dividing the total size of the array by the size of one element.
• Calculate the total size of the array by multiplying the number of elements by the size of each element.

• Divide the total size by the size of one element to get the size of the array.

• For example, if you have an array of strings arr[] = {'hello', 'world', 'example'}, you can find the size by dividing the total
Answered by AI
Add your answer
Q2. Explain how indexing in a database works using B+ trees.
Ans. 
B+ trees are used for indexing in databases to efficiently search and retrieve data.
• B+ trees are balanced trees where each node can have multiple keys and child pointers.

• Data is stored in leaf nodes, while non-leaf nodes are used for navigation.

• B+ trees are commonly used in databases because of their ability to efficiently search and retrieve data.

• Example: In a database table with an index on a specific column, B+ tree...read more
Answered by AI
Add your answer

Round duration - 45 mintues
Round difficulty - Easy

Timing - 11AM-12:15PM
Environment - online video call

Again there was a panel of 2 senior engineers

Q1. 
Maximum Path Sum Problem Statement
You are given an n-ary tree consisting of 'N' nodes. Your task is to determine the maximum sum of the path from the root to any leaf node.
Example:
Input:
For the giv...read more
Ans. 
Find the maximum sum of the path from the root to any leaf node in an n-ary tree.
• Traverse the tree from root to leaf nodes while keeping track of the sum of each path.

• At each node, calculate the sum of the path from the root to that node and update the maximum sum found so far.

• Consider using depth-first search (DFS) or breadth-first search (BFS) for tree traversal.

• Handle cases where nodes have negative values or where
Answered by AI
Add your answer

Q1. Write down the recursion tree for this code:
Ans. 
Recursion tree for a given code
• Identify the base case of the recursion

• Draw a tree structure with each recursive call as a node

• Label each node with the input parameters and return values
Answered by AI
Add your answer