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Question: What is difference between deep copy & sallow copy?

Answer: Deep Copy-In Deep Copy it copies entire page or u can say all objects while in
Shallow Copy-It Copies the some of the object



Category C# Interview Questions & Answers - Exam Mode / Learning Mode
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Question: What is difference between deep copy & sallow copy?
Answer:

Deep Copy-In Deep Copy it copies entire page or u can say all objects while in
Shallow Copy-It Copies the some of the object Source: CoolInterview.com

Answered by: Oza Pratik N | Date: 10/17/2008 | Contact Oza Pratik N Contact Oza Pratik N

A "shallow" copy is when the member values are physically copied from one
object to another, *including* the values of any pointer or reference
members. If there are pointer or reference members, then, those pointers
or references refer to the *same* objects as the original object, which is
usually a bad thing. That's why you want to define a copy constructor and
assignment operator for objects that contain pointers or references.

It's called a "shallow" copy because only the values of the
pointers/references are copied, instead of making copies of those
referred-to objects and setting pointers to them. *That* is what would be
called a "deep" copy, because it's going "deeper" into the structure,
copying everything, not just the first "layer".
Source: CoolInterview.com

Answered by: 1 | Date: 10/21/2008 | Contact 1 Contact 1

Shallow and deep copy are used for copying data between objects.

Shallow Copy:
creating a new object, and then copying the nonstatic fields of the current object to the new object.

If a field is a value type --> a bit-by-bit copy of the field is performed
If a field is a reference type --> the reference is copied but the referred object is not; therefore, the original object and its clone refer to the same object.

in C# and VB.NET, shallow copy is done by the object method MemberwiseClone()

Source: CoolInterview.com

Answered by: kokilanaresh | Date: 10/23/2008 | Contact kokilanaresh Contact kokilanaresh


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