C# Programming - Constructors - Discussion

[A]. Sample s1 = new Sample(); ----->Gives error " Sample does not contain a constructor that takes 0 arguments" as we are not passing parameters.

[B]. Sample s1 = new Sample(10); --->Gives error " Sample does not contain a constructor that takes 1 arguments".

[C]. Sample s2 = new Sample(10, 1.2f); --->Gives error " Sample does not contain a constructor that takes 2 arguments".

[D]. Sample s3 = new Sample(10, 1.2f, 2.4); -->is Right answer.

[E]. Sample s1 = new Sample(, , 2.5); ---->Error 1 Argument missing, Error 2 Argument missing.

A is also correct because there will always present an implement constructor also which does not take any argument.

Simply we can say there are 3 with in the parameter then we got the values three like integer, string, float values.

The Question is about only cretion of object sample.

Even,
A option is correct I think.

Since D option is invoking the Constructor Sample.

Since we have 3 arguments in parameterized constructor.
i.e.
public Sample (int ii, Single jj, double kk)

So while creating an object we have to also use 3 parameters.

I Have integer i, string j, and double k so I can call 3 parameter values
for eg: INPUT: public Sample (int ii, Single jj, double kk);

OUTPUT: Sample s3 = new Sample(10, 1.2f, 2.4);

When we write constructor by your own then default constructor destroyed(), so as we can see in question ,

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

the constructor has been written now if we want to call constructor for this class we will have to create constructor accordingly.
like this---

Sample s3 = new Sample(10, 1.2f, 2.4);

I've passed three parameter & so passes three value. That's right.

In this example we are passing three parameter like int, single, double, . So ans is d.