Microsoft .NET اسئلة واجوبة المقابلات
سؤال 51. Write some code to box and unbox a value type.
// Boxing
int i = 4;
object o = i;
// Unboxing
i = (int) o;
سؤال 52. What is a heap and a stack?
There are 2 kinds of heap – 1: a chunk of memory where data is stored and 2: a tree
based data structure. When we talk about the heap and the stack we mean the first kind
of heap. The stack is a LIFO data structure that stores variables and flow control
information. Typically each thread will have its own stack.
سؤال 53. What is a pointer?
A pointer is a reference to a memory address.
سؤال 54. What does new do in terms of objects?
Initializes an object.
سؤال 55. How do you dereference an object?
Set it equal to null.
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