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Welcome to the LINQ MCQs Page

Dive deep into the fascinating world of LINQ with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of LINQ, a crucial aspect of C# Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of LINQ, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C# Programming.

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Check out the MCQs below to embark on an enriching journey through LINQ. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C# Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of LINQ. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

LINQ MCQs | Page 1 of 2

Explore more Topics under C# Programming

Discuss
Answer: (c).var sortedProds = _db.Products.Orderby(c => c.Category) . ThenBy(n => n.Name)
Discuss
Answer: (c).It is not required that linq should make use of IEnumerable interface
Q3.
Choose the namespace in which the interface IEnumerable is declared?
Discuss
Answer: (b).System.Collections.Generic
Q4.
Can we use linq to query against a DataTable?
Discuss
Answer: (b).No
Q5.
What will be the output of given code snippet?
class Program
 {
     static void Main(string[] args)
     {
         int[] nums = { 1, -2, 3, 0, -4, 5};
         var posNums = from n in nums
                       where n >= 0
                       select n;
        foreach (int i in posNums) 
        Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}
Discuss
Answer: (b).1, 3, 0, 5
Q6.
Select the namespace which should be included while making use of LINQ operations:
Discuss
Answer: (c).System.Linq
Q7.
Select the output for the given code snippet:
class Program
 {
     static void Main(string[] args)
     {
         int[] nums = { 1, -2, 3, 0, -4, 5 };
         var posNums = from n in nums
                       where n % 2 ==0
                       select n;
            Console.Write("The positive values in nums: ");
            foreach (int i in posNums) Console.Write(i + " ");
            Console.WriteLine();
            Console.ReadLine();
        }
    }
Discuss
Answer: (c).code run successfully and executes output
Q8.
Select the output for given code snippet:
class Program
{
    static void Main(string[] args)
    {
        int[] nums = { 1, -2, 3, 0, -4, 5 };
        var posNums = from n in nums
                       where n > -5 && n < 6
                       orderby n descending
                       select n;
        Console.Write("The positive values in nums: ");
        foreach (int i in posNums) Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}
Discuss
Answer: (c).Arranged in descending order code runs successfully
Q9.
Select the output for given code snippet:
class Program
{
    static void Main(string[] args)
    {
        int[] nums = { 16,  9, 25};
        var posNums = from n in nums
                      where n > 0 
                      select Math.Sqrt(n);
 
        Console.Write("The positive values in nums: ");
        foreach (int i in posNums) Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}
Discuss
Answer: (b).Code runs successfully prints required output
Q10.
Select the output for given code snippet:
class Program
{
    static void Main(string[] args)
    {
        int[] nums = {1};
        var posNums = from n in nums
                      wheres n > 0 
                     select Math.Max(78, 9);
        Console.Write("The largest values in nums: ");
        foreach (int i in posNums) Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}
Discuss
Answer: (c).Code runs successfully prints required output
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