Dassault Systemes Applications Engineer Interview Questions and Answers

Q1. Difference between class & interface
Ans. 
Classes can have both implementation and data members, while interfaces can only have method signatures.
• Classes can have constructors, interfaces cannot.

• Classes can have access modifiers for their members, interfaces cannot.

• A class can implement multiple interfaces, but can only inherit from one class.

• Interfaces are used to achieve abstraction and multiple inheritance in Java.

• Example: Class 'Animal' can have methods li...read more
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Q1. About current project
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Had a basic coding test with easy-medium questions along with some HR questions

Q1. 2nd largest element in array
Ans. 
Find the 2nd largest element in an array of strings.
• Sort the array in descending order

• Access the element at index 1 to get the 2nd largest element
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Q2. Top view of given binary tree
Ans. 
To get the top view of a binary tree, we need to find the nodes that are visible when looking at the tree from the top.
• Start from the root node and assign it a horizontal distance of 0.

• Traverse the tree using a queue and keep track of the horizontal distance of each node.

• For each horizontal distance, only keep the node with the smallest level in the result.

• Repeat the process for left and right child nodes, updating the
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Q1. Questions related to iOS and swift basics
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Q2. Design NotificationCenter
Ans. 
NotificationCenter is a system that enables communication between different parts of an application.
• NotificationCenter allows components of an application to communicate without having direct references to each other.

• It uses the observer pattern where objects register themselves as observers for specific notifications.

• Notifications can be posted to the NotificationCenter with optional data.

• Observers can then receive an...read more
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Q1. Design twitter feed & solid principles
Ans. 
Design a Twitter feed using SOLID principles
• Separate classes for each responsibility (Single Responsibility Principle)

• Use interfaces to define behavior and allow for easy swapping of implementations (Open/Closed Principle)

• Dependency Injection to decouple components and make testing easier (Dependency Inversion Principle)

• Liskov Substitution Principle to ensure derived classes can be substituted for their base classes wi...read more
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Q1. It was hiring manger rounds .. Behavioural questions
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Q2. First occurence of given number in sorted array
Ans. 
Find the first occurrence of a given number in a sorted array.
• Use binary search to efficiently find the first occurrence of the number.

• Keep track of the index of the first occurrence as you search through the array.

• Return the index of the first occurrence once found.
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Q1. Project explanation,security concept question,integration basics,what are debug logs
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Q2. Lwc lifecycle hooks and one trigger to code
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Asked QRE question and some query questions

Q1. Introduce yourself
Ans. 
I am a passionate application developer with experience in creating innovative solutions for various industries.
• Experienced in developing web and mobile applications using languages such as Java, JavaScript, and Swift

• Proficient in database management and integration with applications

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile development methodologies and continuous integr
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Q2. What are the technology you are familiar with
Ans. 
I am familiar with a variety of technologies including Java, Python, SQL, HTML, CSS, JavaScript, and Git.
• Java

• Python

• SQL

• HTML

• CSS

• JavaScript

• Git
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Q1. Garbage collector algorithm
Ans. 
Garbage collector algorithm manages memory allocation and deallocation in a program.
• Garbage collector automatically frees up memory that is no longer in use.

• It identifies and removes objects that are no longer referenced by the program.

• There are different types of garbage collector algorithms such as mark-and-sweep, reference counting, and generational.

• Java and .NET languages use garbage collector by default.

• Garbage co...read more
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Q1. Memory management questions
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