Stefanini Interview Questions and Answers

EtherChannel is a Cisco technology that allows multiple physical Ethernet links to be combined into a single logical link for increased bandwidth.

• Increases bandwidth by aggregating multiple links (e.g., 4 x 1 Gbps links = 4 Gbps).

• Provides redundancy; if one link fails, traffic continues over remaining links.

• Supports load balancing across the links, distributing traffic evenly.

• Can be configured using LACP (Link Agg...read more

ref and out are C# keywords for passing arguments by reference, allowing methods to modify the original data.

• ref requires the variable to be initialized before being passed. Example: 'int x = 10; SomeMethod(ref x);'

• out does not require initialization before being passed. Example: 'int y; SomeMethod(out y);'

• Both allow methods to modify the original variable, but ref is for existing data, while out is for returning ...read more

SOLID principles are five design principles aimed at making software designs more understandable, flexible, and maintainable.

• S - Single Responsibility Principle: A class should have one reason to change. For example, a class handling user data should not also handle logging.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification. For instance, using interfaces allows n...read more

OOP stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.

• OOP focuses on creating objects that contain data and methods to manipulate that data.

• Encapsulation: Objects hide their internal state and require interaction through defined interfaces.

• Inheritance: Objects can inherit attributes and methods from other objects.

• Polymorphism: Objects can take on different forms or have...read more

SAP BW is a traditional data warehouse solution, while BW on HANA is optimized for SAP HANA in-memory database.

• SAP BW is a standalone data warehouse solution, while BW on HANA is integrated with SAP HANA in-memory database.

• BW on HANA offers faster data processing and real-time analytics compared to SAP BW.

• BW on HANA allows for advanced analytics and predictive modeling capabilities due to its integration with SAP ...read more

Reversing a string in C# can be achieved using various methods, including built-in functions and manual iteration.

• Using Array.Reverse: Convert the string to a char array, reverse it, and then create a new string. Example: string str = "hello"; char[] charArray = str.ToCharArray(); Array.Reverse(charArray); string reversed = new string(charArray);

• Using LINQ: Utilize the Reverse() method from LINQ. Example: str...read more