Dassault Systemes Interview Questions, Process, and Tips

Program to fetch second highest number from array

• Sort the array in descending order

• Return the second element of the sorted array

Delete removes specific rows while truncate removes all rows from a table.

• Delete is a DML command while truncate is a DDL command.

• Delete is slower than truncate as it logs each row deletion while truncate does not.

• Delete can be rolled back while truncate cannot be rolled back.

• Delete can be used with a WHERE clause to remove specific rows while truncate removes all rows.

• Delete does not reset the identity of a table whil

OOPS pillars are the fundamental principles of Object-Oriented Programming.

• Encapsulation - bundling of data and methods that operate on that data

• Inheritance - ability of a class to inherit properties and characteristics from its parent class

• Polymorphism - ability of objects to take on multiple forms or have multiple behaviors

• Abstraction - hiding of complex implementation details and showing only the necessary informati

Abstract and interface are both used for abstraction in object-oriented programming.

• Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.

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

• Abstract classes can have constructors, while interfaces cannot.

• Interfaces are used for defining contracts, while abstract classes are u

MVC filters are used to intercept and modify HTTP requests and responses in ASP.NET MVC applications.

• Filters can be used for authentication, caching, logging, and exception handling.

• Filters can be applied globally or to specific controllers or actions.

• The execution sequence of filters is determined by their type and scope.

• The order of execution can be modified using the Order property.

• Some common filter types include A...read more

Exception handling in MVC is crucial for error-free application development.

• MVC framework provides a built-in exception handling mechanism.

• Custom exception handling can be implemented using try-catch blocks.

• Global exception handling can be set up in the Global.asax file.

• Logging exceptions can help in debugging and improving application performance.

Sort map entries based on value

• Use a TreeMap to sort the entries based on value

• Implement a Comparator to compare the values

• Convert the TreeMap to a LinkedHashMap to maintain the order of insertion

SOLID design principles are a set of guidelines for writing maintainable and scalable code.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: A class should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes should be substitutable for their base types.

• I - Interface Segregation Principle: A client should not be forced ...read more

Singleton pattern ensures only one instance of a class is created and provides a global point of access to it.

• Private constructor to restrict object creation

• Private static instance variable to hold the single instance

• Public static method to get the instance

• Lazy initialization or eager initialization

• Thread-safe implementation using synchronized keyword or static block

• Examples: java.lang.Runtime, java.awt.Desktop, java.u

Implementing interfaces vs abstract classes in real life

• Interfaces are useful when implementing multiple inheritance in Java

• Abstract classes are useful when creating a base class with some implementation

• Example of interface: implementing Runnable interface in a class to create a thread

• Example of abstract class: creating a base class for different types of vehicles