.NET Architect Interview Questions and Answers

Answering questions related to .NET Core app execution, authentication, exception handling, Entity Framework best practices, design patterns, and SOLID principles.

• Use authentication middleware like JWT or OAuth2

• Implement authorization policies to control access to APIs

• Use try-catch blocks for exception handling

• Use logging to track errors and exceptions

• Use dependency injection for Entity Framework

• Use repository pattern for data access

• Follow SOLID principles for better code des...read more

LINQ queries with GroupBy allow for efficient data aggregation and manipulation in .NET applications.

• GroupBy is used to group elements that share a common attribute.

• Example: var groupedData = data.GroupBy(x => x.Category);

• You can project results after grouping using Select.

• Example: var result = groupedData.Select(g => new { Category = g.Key, Count = g.Count() });

• GroupBy can be combined with other LINQ methods like OrderBy and Where.