Online C# Programming Test - C# Programming Test 4

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Which of the following are NOT true about .NET Framework?

It provides a consistent object-oriented programming environment whether object code is stored and executed locally, executed locally but Internet-distributed, or executed remotely.
It provides a code-execution environment that minimizes software deployment and versioning conflicts.
It provides a code-execution environment that promotes safe execution of code, including code created by an unknown or semi-trusted third party.
It provides different programming models for Windows-based applications and Web-based applications.
It provides an event driven programming model for building Windows Device Drivers.

1, 2

2, 4

4, 5

1, 2, 4

[#]

What will be the output of the C#.NET code snippet given below?

int val;
for (val = -5; val <= 5; val++)
{
    switch (val)
    {
        case 0:
            Console.Write ("India"); 
            break;
    }
    
    if (val > 0)
        Console.Write ("B"); 
    else if (val < 0)
        Console.Write ("X");
}

XXXXXIndia

IndiaBBBBB

XXXXXIndiaBBBBB

BBBBBIndiaXXXXX

Zero

[#]

Which of the following CANNOT occur multiple number of times in a program?

namespace

Entrypoint

Class

Function

Subroutine

[#]

Which of the following statements are correct about functions and subroutines used in C#.NET?

A function cannot be called from a subroutine.
The ref keyword causes arguments to be passed by reference.
While using ref keyword any changes made to the parameter in the method will be reflected in that variable when control passes back to the calling method.
A subroutine cannot be called from a function.
Functions and subroutines can be called recursively.

1, 2, 4

2, 3, 5

3, 5

4, 5

None of these

[#]

Which of the following statements is correct about the C#.NET code snippet given below?

namespace IndiabixConsoleApplication
{ 
    class Sample
    { 
        public int index; 
        public int[] arr = new int[10]; 
        
        public void fun(int i, int val)
        { 
            arr[i] = val;
        }
    }
     
    class MyProgram
    { 
        static void Main(string[] args)
        {
            Sample s = new Sample(); 
            s.index = 20; 
            Sample.fun(1, 5); 
            s.fun(1, 5); 
        } 
    } 
}

s.index = 20 will report an error since index is public.

The call s.fun(1, 5) will work correctly.

Sample.fun(1, 5) will set a value 5 in arr[ 1 ].

The call Sample.fun(1, 5) cannot work since fun() is not a shared function.

arr being a data member, we cannot declare it as public.

[#]

Which of the following is the correct way to create an object of the class Sample?

Sample s = new Sample();
Sample s;
Sample s; s = new Sample();
s = new Sample();

1, 3

2, 4

1, 2, 3

1, 4

None of these

[#]

Which of the following statements are correct?

Data members ofa class are by default public.
Data members of a class are by default private.
Member functions of a class are by default public.
A private function of a class can access a public function within the same class.
Member function of a class are by default private.

1, 3, 5

1, 4

2, 4, 5

1, 2, 3

None of these

[#]

Which of the following is the correct way to define the constructor(s) of the Sample class if we are to create objects as per the C#.NET code snippet given below?

Sample s1 = new Sample(); 
Sample s2 = new Sample(9, 5.6f);

public Sample()
{
    i = 0; 
    j = 0.0f;
}
public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

public Sample (Optional int ii = 0, Optional Single jj = 0.0f)
{
    i = ii;
    j = jj;
}

public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

Sample s;

s = new Sample();

[#]

There is no private or protected inheritance in C#.NET.

True

False

[#]

10.

If a base class contains a member function func(), and a derived class does not contain a function with this name, an object of the derived class cannot access func().

True

False

[#]

11.

If s1 and s2 are references to two strings, then which of the following is the correct way to compare the two references?

s1 is s2

s1 = s2

s1 == s2

strcmp(s1, s2)

s1.Equals(s2)

[#]

12.

Creating empty structures is allowed in C#.NET.

True

False

[#]

13.

With which of the following can the ref keyword be used?

Static data
Instance data
Static function/subroutine
Instance function/subroutine

1, 2

3, 4

1, 3

2, 4

All of the above

[#]

14.

Which of the following statements is incorrect about a delegate?

A single delegate can invoke more than one method.

Delegates can be shared.

Delegate is a value type.

Delegates are type-safe wrappers for function pointers.

The signature of a delegate must match the signature of the method that is to be called using it.

[#]

15.

Which of the following statements is incorrect about delegate?

Delegates are reference types.

Delegates are object oriented.

Delegates are type-safe.

Delegates serve the same purpose as function pointers in C and pointers to member function operators in C++.

Only one method can be called using a delegate.

[#]

16.

The [Serializable()] attribute gets inspected at

Compile-time

Run-time

Design-time

Linking-time

None of the above

[#]

17.

Which of the following statements are correct about Attributes in C#.NET?

On compiling a C#.NET program the attibutes applied are recorded in the metadata of the assembly.
On compilation all the attribute's tags are deleted from the program.
It is not possible to create custom attributes..
The attributes applied can be read from an assembly using Reflection class.
An attribute can have parameters.

1 and 2 only

2 and 4 only

1, 4 and 5 only

All of the above

None of the above

[#]

18.

Which of the following C#.NET code snippets will correctly print "Hello C#.NET"?

import System; 
namespace IndiabixConsoleApplication
{ 
    class MyProgram
    { 
        static void Main(string[] args)
        { 
            Console.WriteLine("Hello C#.NET");
        } 
    } 
}

using System;
namespace IndiabixConsoleApplication
{ 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            WriteLine("Hello C#.NET");
        } 
    } 
}

using System.Console; 
namespace IndiabixConsoleApplication
{ 
    class MyProgram
    { 
        static void Main (string[ ] args)
        { 
            WriteLine("Hello C#.NET");
        } 
    } 
}

using System;
namespace IndiabixConsoleApplication
{ 
    class MyProgram
    { 
        static void Main(string[] args)
        { 
            Console.WriteLine("Hello C#.NET");
        }
    }
}

[#]

19.

Which of the following is absolutely neccessary to use a class Point present in namespace Graph stored in library?

Use fully qualified name of the Point class.

Use using statement before using the Point class.

Add Reference of the library before using the Point class.

Use using statement before using the Point class.

Copy the library into the current project directory before using the Point class.

[#]

20.

Which of the following statements is correct?

The conditional logical operators cannot be overloaded.

When a binary operator is overloaded the corresponding assignment operator, if any, must be explicitly overloaded.

We can use the default equality operator in an overloaded implementation of the equality operator.

A public or nested public reference type does not overload the equality operator.

The array indexing operator can be overloaded.

[#]

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