Miscellaneous in C Sharp MCQs with Answers 2027

Q141

What is meant by preprocessor directive #define?

Select an option to see the answer and solution.

Q142

Choose the correct statements for the following C# code?

public System.Collections.IEnumerator GetEnumerator()
{
    foreach (char ch in chrs)
    yield return ch;
}

Select an option to see the answer and solution.

Q143

Open question

Which among the given is not a correct way to call the method Issue() defined in the following C# code snippet?

class Book
{
    public void issue()
    {
      /* code */
    }
}
class Journel
{
     public void issue()
     {
         /* code */
     }
}

Select an option to see the answer and solution.

Q144

Open question

What will be the output of the following C# code snippet?

class UnsafeCode
{
    static void Main()
    {
        int? count = null;
        int? result = null;
        int incr = 10;
        result = count + incr;
        if (result.HasValue)
            Console.WriteLine("result has this value: " + result.Value);
        else
            Console.WriteLine("result has no value");
        Console.ReadLine();
    }
}

Select an option to see the answer and solution.

Q145

Open question

What is Semaphore?

Select an option to see the answer and solution.

Q146

Open question

What will be the output of the following C# code snippet?

#define DEBUG 
#undef DEBUG
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace ConsoleApplication13
{
    class Program
    {   
        static void Main(string[] args)
        {
            #if (DEBUG)
            Console.WriteLine("DEBUG is defined");
            #elif (!DEBUG && MYTEST)
            Console.WriteLine("MYTEST is defined");
            #elif (DEBUG && MYTEST)
            Console.WriteLine("DEBUG and MYTEST are defined");
            #else
            Console.WriteLine("DEBUG and MYTEST are not defined");
            #endif
            Console.ReadLine();
       }
   }
}

Select an option to see the answer and solution.

Q147

Open question

What will be the output of the following C# code snippet?

class UnsafeCode
{
    struct MyStruct
    {
        public int a;
        public int b;
        public int Sum() 
       { 
           return a * b; 
       }
   }
   unsafe static void Main()
   {
       MyStruct o = new MyStruct();
       MyStruct* p; 
       p = &o;
       p->a = 10; 
       p->b = 20; 
       Console.WriteLine("Value is " + p->Sum());
       Console.ReadLine();
   }

Select an option to see the answer and solution.

Q148

Open question

What will be the output of the following C# code snippet?

class UnsafeCode
{
    unsafe static void Main()
    {
        int* a;
        int a1 = 10;
        int b1;
        b1 = *&a1;
        a = &b1;
        {
            Console.WriteLine(*a);
            Console.ReadLine();
        }
    }
}

Select an option to see the answer and solution.

Q149

Open question

Which of these keywords are used to implement synchronization?

Select an option to see the answer and solution.

Q150

Open question

Among the given pointer which of the following cannot be incremented?

Select an option to see the answer and solution.

Q151

Open question

Choose the correct statement about System.Type namespace.

Select an option to see the answer and solution.

Q152

Open question

What will be the output of the following C# code snippet?

class test
{
    public   int a;
    public  int b;
    public  test(int i, int j)
    {
        a = i;
        b = j;
    }
    public void meth(test o)
    {
        o.a *= 2;
        o.b /= 2;
    }
}    
class Program
{
    static void Main(string[] args)
    {
        test obj = new test(10, 20);
        obj.meth(obj);
        Console.WriteLine(obj.a + " " + obj.b);    
        Console.ReadLine();
    }
}

Select an option to see the answer and solution.

Q153

Open question

Which among the following statements are not correct about a namespace used in C#.NET?

Select an option to see the answer and solution.

Q154

Open question

Which among the following is referred as an array of pointers?

Select an option to see the answer and solution.

Q155

Open question

How many values can be returned from a function simultaneously using pointers?