C# Programming - Classes and Objects - Discussion
Discussion Forum : Classes and Objects - General Questions (Q.No. 1)
1.
Which of the following statements is correct about the C#.NET code snippet given below?
class Student s1, s2; // Here 'Student' is a user-defined class.
s1 = new Student();
s2 = new Student();Discussion:
17 comments Page 1 of 2.
Dickenz said:
8 years ago
A: S1 and S2 are merely reference variables containing the addresses of the 2 objects created therefor contents are different.
B: reference type variables are created on the heap not stack.
D: objects created on the heap are allocated memory at run time such that they are not necessarily created in adjacent memory.
E: deleting from memory is done by garbage collection or explicitly defining a despose method using methods such as GC.SuppressFinalize.
B: reference type variables are created on the heap not stack.
D: objects created on the heap are allocated memory at run time such that they are not necessarily created in adjacent memory.
E: deleting from memory is done by garbage collection or explicitly defining a despose method using methods such as GC.SuppressFinalize.
Indrapal said:
1 decade ago
I do not think compiler will assign the content to both object and I tried to VS2010 and show that objects has the different content
BaseClass s1,s2;// = new Drived();
s1 = new BaseClass();
s2 = new BaseClass();
if (s1 == s2)
{
Console.WriteLine("contents of both objects are same");
}
BaseClass s1,s2;// = new Drived();
s1 = new BaseClass();
s2 = new BaseClass();
if (s1 == s2)
{
Console.WriteLine("contents of both objects are same");
}
Alek said:
9 years ago
This is wrong, for example if Student is defined as:
class student
{
static int _last_id;
static Student () { _last_id = 0; }
int id;
student ()
{
id = _last_id;
_last_id++;
}
}
Then obviously their contents won't be the same.
The correct answer is : 'Program won't compile'.
Because keyword class is illegal in a statement.
class student
{
static int _last_id;
static Student () { _last_id = 0; }
int id;
student ()
{
id = _last_id;
_last_id++;
}
}
Then obviously their contents won't be the same.
The correct answer is : 'Program won't compile'.
Because keyword class is illegal in a statement.
Naresh said:
1 decade ago
@Indrapal.
s1 and s2 contains the address that where the content is stored.
So s1 and s2 are stored at diff memory locations so obviously if block won't execute.
@Paurush.
Exactly same means including addresses of the objects,
But its not true as I explained above,
So the answer is C only.
s1 and s2 contains the address that where the content is stored.
So s1 and s2 are stored at diff memory locations so obviously if block won't execute.
@Paurush.
Exactly same means including addresses of the objects,
But its not true as I explained above,
So the answer is C only.
Andrew Cope said:
1 decade ago
Slightly sneaky indeed. It shouldn't say 'Contents of..exactly the same'. It would be more correct to say 'The characteristics of the two objects will be the same'.
That covers off the scenario mentioned above where member data is being initialised to random or otherwise variant values.
That covers off the scenario mentioned above where member data is being initialised to random or otherwise variant values.
G.SRIRAM said:
1 decade ago
No issue.
A default constructor with dynamic allocation of objects is created a default constructor accepts no parameters. So the constructors that are created will have same characteristics.
A default constructor with dynamic allocation of objects is created a default constructor accepts no parameters. So the constructors that are created will have same characteristics.
Andrue Cope said:
1 decade ago
Yuk, sneaky question :)
I think a lot of C# programmers will assume that 'the contents of s1' mean the object pointed to it. I did. Have to say that it's more clear if you rewrite in C++ :D
I think a lot of C# programmers will assume that 'the contents of s1' mean the object pointed to it. I did. Have to say that it's more clear if you rewrite in C++ :D
Sidhu said:
9 years ago
BaseClass s1,s2;// = new Drived();
s1 = new BaseClass();
s2 = new BaseClass();
if (s1 == s2)
{
Console.WriteLine("contents of both objects are same");
}
s1 = new BaseClass();
s2 = new BaseClass();
if (s1 == s2)
{
Console.WriteLine("contents of both objects are same");
}
John said:
9 years ago
@Alek.
Yes same thoughts here, the code given won't compile, because the class keyword is used before the declaration of the 2 student objects s1, s2.
Yes same thoughts here, the code given won't compile, because the class keyword is used before the declaration of the 2 student objects s1, s2.
Kanika said:
1 decade ago
In terms of memory allocated to s1 and s2 they are equal i.e.
All objects created from a class will occupy equal number of bytes in memory.
All objects created from a class will occupy equal number of bytes in memory.
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