LINQ perguntas e respostas de entrevista

Pergunta 1. What is LINQ?

Language-Integrated Query (LINQ) is a set of features in C# and VB.NET that allows you to write queries directly into your code.

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Pergunta 2. Explain the difference between IEnumerable and IQueryable in LINQ.

IEnumerable is used for querying data from in-memory collections, while IQueryable is used for querying data from out-of-memory data sources like a database.

Pergunta 3. What is deferred execution in LINQ?

Deferred execution means that the execution of the query is delayed until the result is actually enumerated or a terminal operation is called.

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Pergunta 4. Explain the concept of anonymous types in LINQ.

Anonymous types allow you to create objects without defining a formal class structure. They are often used in LINQ queries to return a subset of properties.

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Pergunta 5. What is the purpose of the 'let' keyword in LINQ?

The 'let' keyword allows you to create a new variable within a query and use it within the rest of the query.

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