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LINQ (Language-Integrated Query) in C Sharp MCQ question and answer with solution | C# Program MCQs

Learn LINQ (Language-Integrated Query) in C Sharp MCQ Questions and answers with easy and logical explanations in C# Program. LINQ (Language-Integrated Query) in C Sharp MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination. Page-7 section-1

61
Choose the namespace in which the interface IEnumerable is declared?
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Answer & Solution
Answer: Option B
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62
Select the Keyword which supports the run time type identification?
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Answer & Solution
Answer: Option C
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63
What will be the output of the following C# code snippet?
static void Main() 
{
    int[] nums = { 1, 2, 3, 4, 5 };
    Console.Write("Original order: ");
    foreach(int i in nums)
    Console.Write(i + " ");
    Array.Reverse(nums);
    Console.Write("Reversed order: ");
    foreach(int i in nums)
    Console.Write(i + " ");
    Console.WriteLine();
}
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Answer & Solution
Answer: Option B
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64
Choose the wrong statement about the LINQ?
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Answer & Solution
Answer: Option C
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65
What will be the output of the following C# 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();
   }
}
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Answer & Solution
Answer: Option B
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66
Select the interfaces implemented by array class.
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Answer & Solution
Answer: Option D
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67
What will be the output of the following C# 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();
    }
}
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Answer & Solution
Answer: Option C
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68
Select the class which is the base class for all arrays in C#?
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Answer & Solution
Answer: Option A
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69
What will be the output of the following C# 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();
       }
}
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Answer & Solution
Answer: Option C
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70
What will be the output of the following C# 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();
    }
}
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Answer & Solution
Answer: Option B
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