ExamAdept

Which of the following statements is correct about the using statement used in C#.NET?

A:

using statement can be placed anywhere in the C#.NET source code file.

B:

It is permitted to define a member at namespace level as a using alias.

C:

A C#.NET source code file can contain any number of using statement.

D:

By using using statement it is possible to create an alias for the namespace but not for the namespace element.

Answer: C

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Which of the following is correct way to rewrite the C#.NET code snippet given below?

using Microsoft.VisualBasic;
using System.Windows.Forms;
MessageBox.Show("Wait for a" + ControlChars.CrLf + "miracle");

A:

using System.Windows.Forms;
using CtrlChars = Microsoft.VisualBasic.ControlChars; 
MessageBox.Show("Wait for a" + CrLf + "miracle");

B:

using Microsoft.VisualBasic; 
using System.Windows.Forms; 
CtrlChars = ControlChars;
MessageBox.Show("Wait for a" + CtrlChars.CrLf + "miracle");

C:

using Microsoft.VisualBasic; 
using System.Windows.Forms; 
CtrlChars = ControlChars; 
MessageBox.Show ("Wait for a" + CrLf + "miracle");

D:

using System.Windows.Forms;
using CtrlChars = Microsoft.VisualBasic.ControlChars; 
MessageBox.Show("Wait for a" + CtrlChars.CrLf + "miracle");

Answer: D

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Which of the following statements is correct about namespaces in C#.NET?

A:

Namespaces can be nested only up to level 5.

B:

A namespace cannot be nested.

C:

There is no limit on the number of levels while nesting namespaces.

D:

If namespaces are nested, then it is necessary to use using statement while using the elements of the inner namespace.

Answer: C

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Which of the followings are NOT a .NET namespace?

System.Web
System.Process
System.Data
System.Drawing2D
System.Drawing3D

A:

1, 3

B:

2, 4, 5

C:

3, 5

D:

1, 2, 3

Answer: B

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If a class called Point is present in namespace n1 as well as in namespace n2, then which of the following is the correct way to use the Point class?

A:

namespace ExamAdept
{ 
    class MyProgram
    { 
        static void Main(string[] args)
        { 
            import n1; 
            Point x = new Point();
            x.fun();
            import n2;
            Point y = new Point(); 
            y.fun();
        }
    }
}

B:

import n1; 
import n2;
namespace ExamAdept
{ 
    class MyProgram
    { 
        static void Main(string[] args)
        {
            n1.Point x = new n1.Point(); 
            x.fun();
            n2.Point y = new n2.Point(); 
            y.fun();
        }
    }
}

C:

namespace ExamAdept
{ 
    class MyProgram
    {
        static void Main(string[] args)
        {
            using n1;
            Point x = new Point();
            x.fun();
            using n2;
            Point y = new Point();
            y.fun();
        }
    }
}

D:

using n1;
using n2; 
namespace ExamAdept
{ 
    class MyProgram
    { 
        static void Main(string[] args)
        { 
            n1.Point x = new n1.Point(); 
            x.fun();
            n2.Point y = new n2.Point(); 
            y.fun(); 
        } 
    } 
}

Answer: D

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Questions for: Namespaces