Explain the use of this pointer.
Latest answer: The this keyword is used to represent an object
that invokes the member function. It points to the object for which this
function was called. It is automatically passed to a member function when it is
called....................
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Explain what happens when a pointer is
deleted twice.
Latest answer: If you delete a pointer and set it to NULL, it
it possibly cannot have an adverse effect. It is safe. However, if a pointer is
deleted an not nullified, then it can cause a trap....................
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What is a smart pointer?
Latest answer: Smart pointers are objects which store pointers
to dynamically allocated (heap) objects. They are like built-in C++ pointers.
However, they automatically delete the object pointed to at the appropriate
time...................
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What is the difference between an inspector
and a mutator?
Latest answer: The get() functions are usually refered to as
inspectors as that just retrieve the data values from the
source.....................
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What is pointer? Explain with examples
Latest answer: A pointer is a variable that holds a memory
address. This address is the location of another object (typically, a variable)
in memory. That is, if one variable contains the address of another variable,
the first variable is said to point to the second...................
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Pointer to constant vs.
pointer constant
Latest answer: Pointer Constant (or constant pointer) is a
pointer which you don’t want to be pointed to a different value. That is, the
location stored in the pointer can not change. We can not change where the
pointer points. It is declared as:....................
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answer
What are function pointers?
Latest answer: A function has a physical location in the memory
which is the entry point of the function. And this is the address used when a
function is called. This address can be assigned to a pointer. Once a pointer
points to a function, the function can be called through that pointer. Function
pointers also allow..................
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What is pointer to member?
Latest answer: not to a specific instance of that member in an
object. This type of pointer is called a pointer to a class member or a
pointer-to-member. It is not same as normal C++ pointer. Instead it provides
only an offset into an object of the member’s class at which that member can be
found. Since member....................
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What is const pointer and
const reference?
Latest answer: const pointer is a pointer which you don’t want
to be pointed to a different value. That is, the location stored in the pointer
can not change. We can not change where the pointer points. It is declared
as:..................
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answer
What is NULL pointer and void
pointer and what is their use?
Latest answer: A NULL pointer has a fixed reserved value that
is not zero or space, which indicates that no object is referred. NULL pointers
are used in C and C++ as compile-time constant. NULL pointer represents certain
conditions, like successor to the last element in linked list, while a
consistent structure of the list of nodes are maintained......................
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