Classes and Objects in C Sharp MCQ question and answer with solution

51.

Correct way to define object of sample class in which C# code will work correctly is:

class abc
{
    int i;
    float k;
    public abc(int ii, float kk)
    {  
        i = ii;
        k = kk;
    }
}

A. abc s1 = new abc(1);

B. abc s1 = new abc();

C. abc s2 = new abc(1.4f);

D. abc s2 = new abc(1, 1.4f);

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52.

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

class maths
{
    public int fun(int k, int y)
    {
        return k + y;
    }
    public int fun1(int t, float z)
    {
        return (t+(int)z);
    }
}    
class Program
{
    static void Main(string[] args)
    {
        maths obj = new maths();
        int i;
        int b = 90;
        int c = 100;
        int d = 12;
        float l = 14.78f;
        i = obj.fun(b, c);
        Console.WriteLine(i);
        int j = (obj.fun1(d,  l));
        Console.WriteLine(j);
        Console.ReadLine();
    }
}

A. 190, 26.78f

B. 0, 26.78f

C. 190, 26

D. 190, 0

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53.
Select the correct statement from the following?

A. Static methods can be a virtual method

B. Abstract methods can be a virtual method

C. When overriding a method, the names and type signatures of the override method must be the same as the virtual method that is being overridden

D. We can override virtual as well as nonvirtual methods

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54.
The method called by clients of a class to explicitly release any resources like network, connection, open files etc. When the object is no longer required?

A. Finalize()

B. End()

C. Dispose()

D. Close()

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55.

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

static void Main(string[] args)
{
    int i = 5;
    int j  = 6;
    add(ref i);
    add(6);
    Console.WriteLine(i);
    Console.ReadLine();
}
static void add(ref int x)
{
    x = x * x;
}
static void add(int x)
{
    Console.WriteLine(x * x * x);
}

A. Compile time error

B. 25
0

C. 216
0

D. 216
25

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56.

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

class sample
{
    public int i;
    public int j;
    public void fun(int i, int j)
    {
        this.i = i;
        this.j = j;
    }
}
class Program
{
    static void Main(string[] args)
    {
        sample s = new sample();
        s.i = 1;
        s.j = 2;
        s.fun(s.i, s.j);
        Console.WriteLine(s.i + " " + s.j);
        Console.ReadLine();
    }
}

A. Error while calling s.fun() due to inaccessible level

B. Error as 'this' reference would not be able to call 'i' and 'j'

C. 1 2

D. Runs successfully but prints nothing

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57.

What will be size of the object created depicted by C# code snippet?

class baseclass
{
    private int a;
    protected int b;
    public int c;
}
class derived : baseclass
{
    private int x;
    protected int y;
    public int z;
}
class Program
{
    static Void Main(string[] args)
    {
        derived a = new derived();
    }
}

A. 20 bytes

B. 12 bytes

C. 16 bytes

D. 24 bytes

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58.
Correct way to define operator method or to perform operator overloading is?

A.

public static op(arglist)
{
 
}

B.

public static retval op(arglist)
{
 
}

C.

public static retval operator op(arglist)
{
 
}

D. All of the mentioned

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59.
When a function fun() is to receive an int, a single & a double and it is to return a decimal, then the correct way of defining this C# function is?

A.

static fun(int i, single j, double k)
{
    return decimal;
}

B.

static decimal fun(int i, single, double k)
{
 
}

C.

decimal fun(int i, single j, double k)
{
 
}

D.

decimal static fun(int i, single j, double k)
{
 
}

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60.
Which of the following statements is correct about constructors in C#.NET?

A. A constructor cannot be declared as private

B. A constructor cannot be overloaded

C. A constructor can be a static constructor

D. None of the mentioned

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51.
Correct way to define object of sample class in which C# code will work correctly is:

`class abc { int i; float k; public abc(int ii, float kk) { i = ii; k = kk; } }`

Answer & Solution

Answer & Solution

53.
Select the correct statement from the following?

Answer & Solution

54.
The method called by clients of a class to explicitly release any resources like network, connection, open files etc. When the object is no longer required?

Answer & Solution

55.
What will be the output of the following C# code?

`static void Main(string[] args) { int i = 5; int j = 6; add(ref i); add(6); Console.WriteLine(i); Console.ReadLine(); } static void add(ref int x) { x = x * x; } static void add(int x) { Console.WriteLine(x * x * x); }`

Answer & Solution

Answer & Solution

57.
What will be size of the object created depicted by C# code snippet?

`class baseclass { private int a; protected int b; public int c; } class derived : baseclass { private int x; protected int y; public int z; } class Program { static Void Main(string[] args) { derived a = new derived(); } }`

Answer & Solution

58.
Correct way to define operator method or to perform operator overloading is?

Answer & Solution

59.
When a function fun() is to receive an int, a single & a double and it is to return a decimal, then the correct way of defining this C# function is?

Answer & Solution

60.
Which of the following statements is correct about constructors in C#.NET?

Answer & Solution

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Classes and Objects in C Sharp MCQ question and answer with solution | C# Program MCQs

51. Correct way to define object of sample class in which C# code will work correctly is: class abc { int i; float k; public abc(int ii, float kk) { i = ii; k = kk; } }

Answer & Solution

Answer & Solution

53. Select the correct statement from the following?

Answer & Solution

54. The method called by clients of a class to explicitly release any resources like network, connection, open files etc. When the object is no longer required?

Answer & Solution

55. What will be the output of the following C# code? static void Main(string[] args) { int i = 5; int j = 6; add(ref i); add(6); Console.WriteLine(i); Console.ReadLine(); } static void add(ref int x) { x = x * x; } static void add(int x) { Console.WriteLine(x * x * x); }

Answer & Solution

Answer & Solution

57. What will be size of the object created depicted by C# code snippet? class baseclass { private int a; protected int b; public int c; } class derived : baseclass { private int x; protected int y; public int z; } class Program { static Void Main(string[] args) { derived a = new derived(); } }

Answer & Solution

58. Correct way to define operator method or to perform operator overloading is?

Answer & Solution

59. When a function fun() is to receive an int, a single & a double and it is to return a decimal, then the correct way of defining this C# function is?

Answer & Solution

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

Answer & Solution

Read More Section(Classes and Objects in C Sharp)

51.
Correct way to define object of sample class in which C# code will work correctly is:

`class abc { int i; float k; public abc(int ii, float kk) { i = ii; k = kk; } }`

53.
Select the correct statement from the following?

54.
The method called by clients of a class to explicitly release any resources like network, connection, open files etc. When the object is no longer required?

55.
What will be the output of the following C# code?

`static void Main(string[] args) { int i = 5; int j = 6; add(ref i); add(6); Console.WriteLine(i); Console.ReadLine(); } static void add(ref int x) { x = x * x; } static void add(int x) { Console.WriteLine(x * x * x); }`

57.
What will be size of the object created depicted by C# code snippet?

`class baseclass { private int a; protected int b; public int c; } class derived : baseclass { private int x; protected int y; public int z; } class Program { static Void Main(string[] args) { derived a = new derived(); } }`

58.
Correct way to define operator method or to perform operator overloading is?

59.
When a function fun() is to receive an int, a single & a double and it is to return a decimal, then the correct way of defining this C# function is?

60.
Which of the following statements is correct about constructors in C#.NET?