Dassault Systemes Interview Questions, Process, and Tips for Freshers

Sort a list of alphanumeric values.

• Use a sorting algorithm to sort the array of strings.

• If the values are case-insensitive, convert them to lowercase before sorting.

• If the values contain numbers, use a natural sorting algorithm to sort them.

• If the values contain special characters, consider their ASCII values while sorting.

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

• Create a private constructor to prevent direct instantiation of the class

• Create a private static instance of the class

• Create a public static method to access the instance

• Ensure thread safety by using synchronized keyword or static initialization block

• Example: Database connection manager

Reverse a linked list

• Iteratively swap the next and previous pointers of each node

• Recursively swap the next and previous pointers of each node

• Use a stack to push each node and then pop them to create the reversed list

An immutable class is a class whose instances cannot be modified after creation.

• Make all fields private and final

• Do not provide any setters

• Make the class final so that it cannot be subclassed

• If any mutable object is used as a field, return a copy of it instead of the original object