.NET - Language-Integrated Query (LINQ)

5.
In which statement the LINQ query is executed?
A LINQ query is executed in the For Each statement in Visual Basic and in the foreach statement in C#.

6.
In LINQ, lambda expressions underlie many of the standard query operators. Is it True or False?
It is true.

7.
What is PLINQ?
PLINQ stands for Parallel Language Integrated Query. It is the parallel implementation of LINQ, in which a query can be executed by using multiple processors. PLINQ ensures the scalability of software on parallel processors in the execution environment. It is used where data grows rapidly, such as in telecom industry or where data is heterogeneous.

PLINQ also supports all the operators of LINQ. In addition, you can query 'collections by using PLINQ. It can also run several LINQ queries simultaneously and makes use of the processors on the system. Apart from this, PLINQ uses parallel execution, which helps in running the queries quickly. Parallel execution provides a major performance improvement to PLINQ over certain types of legacy code, which takes too much time to execute.

8.
What are the different Visual Basic features that support LINQ?
Visual Basic includes the following features that support LINQ:
  • Anonymous types - Enables you to create a new type based on a query result.
  • Implicitly typed variables - Enables the compiler to infer and assign a type when you declare and initialize a variable.
  • Extension method - Enables you to extend an existing type with your own methods without modifying the type itself.